Abstract: A growing system and/or plant support structure may include one or more feet supporting at least one or more uprights, on which a plurality of plants and/or grow boards for growing plants may be positioned. A nutrient delivery system may be positioned between opposing uprights to provide nutrient supply to a root zone of plants, which nutrient delivery system may be positioned adjacent each opposing upright in an interior chamber of the plant support structure. A light system may be positioned between two adjacent plant support structures such that it simultaneously provides light to the exterior surface of the two plant support structures.

Abstract: An apparatus and system for growing plants in a controlled environment comprises an enclosure, at least one basket for receiving plant material to be grown in the apparatus, and at least one cassette for receiving a basket therein. The apparatus further comprises a drive mechanism, said drive mechanism operatively coupled to the at least one basket and/or the at least one cassette, that imparts a drive force to cause the at least one basket to rotate in the at least one cassette and in the enclosure. The apparatus and system also include a climate-control mechanism that may include a light source, a fan, a ventilation system, an air passage, and ductwork. The apparatus and system also include a trough with a sump for drainage of the trough, an intake aperture, a baffle, a closure, an air intake sleeve, and an intake fan.

Abstract: A modular vertical water storage greening unit includes a water tank (1), a planting groove (2), and a water supply device. The water tank (1) and the planting groove (2) are arranged on a facade of a building. The planting groove (2) is installed at a front wall of the water tank (1). The water supply device includes a main water pipe (14) and a capillary tube (15). A certain amount of water is supplied to the interior of the water tank (1) so as to water a plant in the planting groove (2). A modular vertical water storage greening system includes a plurality of the modular vertical water storage greening units. Compared with conventional facade greening techniques, the unit solves the problems, such as nonuniformity watering of plants, low watering levels, and high maintenance costs.

Abstract: A mixed media farm may include a tray for holding water at a prescribed water level. A cell may be placable on the tray, with the cell defining a cavity and having at least one opening in communication with the cavity. The cell may be sized such that when the cell is placed on the tray, a lower portion of the cell resides below the prescribed water level and an upper portion of the cell resides above the prescribed water level. Soil may be in the cavity, with the soil having a lower portion below the prescribed water level, and an upper portion above the prescribed water level when the cell is placed in the tray. A plurality of seeds may be planted in the upper portion of the soil, with the plurality of seeds defining a seed density of greater than 5 seeds per square inch.

Abstract: A planter may include a housing configured to house one or more growth units, which are individual positions in the planter for growing an individual plant. The planter may include one or more liquid supply lines embedded in an upper portion of the housing, and a drain line embedded in a lower portion of the housing. A drain that is configured to remove liquid from the planter and supply the removed liquid to a pump via the drain line may also be provided. An upper surface of the housing of the planter may include, for each of the one or more growth units, a through hole that passes through the upper surface of the planter housing into the inner chamber of the growth unit.

Abstract: An ecologically green unit to be mounted on an existing wall, includes a base frame; a securing arrangement for securing the base frame as a façade to a front face of an existing wall of a building; a plant root securing mat for securing roots of plants in the base frame; a plant guide formed of a mesh of wires at a front of the base frame for orienting and maintaining the plants in a desired orientation; a water supplying arrangement for supplying water to the plants in the base frame, the water supplying arrangement including at least one capillary member for wicking water to different areas within the base frame and an arrangement for collecting and supplying rain water to the base frame; and an arrangement for directing sunlight to an interior of the base frame.

Abstract: An aeroponic column comprises a base, a planter section attached to the base, wherein the planter section defines a hollow interior, a channel and plant holder openings adapted to receive a plant holder, a nutrient distributor attached over the planter section with fluid openings adapted to allow fluid to flow down the planter sections, and a conduit assembly operatively connected between the base and the nutrient distributor, and adapted to carry fluid from the base to the nutrient distributor. The conduit assembly comprises a conduit formed separate from the planter section, the conduit extends through the channel of the planter section, and the conduit has a male threaded first end and a female threaded second end.

Abstract: Growing systems may include a number of modular growing chambers with integrated support columns that eliminate the need for an external support frame and which provide a simple way to remove chambers from a stack for harvesting. Pins provided on the support columns ensure alignment and provide for easy removal of a lower chamber by first supporting the stack and slightly lowering it relative to the stack. The chambers may be provided with one or more removable access panels that provide access to the interior of the chambers for harvesting from the plant section inside. The chamber structure supports harvesting processes that permit harvesting of chambers in sequence by sequentially accessing the interior of successive chambers and harvesting a production portion from the plant section inside. Plant production can be made continuous and perpetual by sequentially harvesting from successive chambers and repeating the process after a plant section in a first chamber has regenerated another production portion.

Abstract: A hydroponic plant cultivation apparatus including a reservoir having a base defining a first portion of the reservoir and a cover defining a second portion of the reservoir. An upper opening is defined in the cover. A planting column with a hollow interior is positioned above the upper opening. At least one planting port is defined in the planting column. A conduit can pass through the hollow interior of the planting column, the conduit fluidly communicated with the reservoir. A fluid distributor is positioned atop the planting column, the fluid distributor in fluid communication with the conduit. Fluid is selectively circulated from the reservoir through the conduit in the planting column to the fluid distributor, where the fluid is redirected down the hollow interior of the planting column and back to the reservoir. A hydroponic plant cultivation apparatus including a reservoir positioned on a plurality of rollers.

Abstract: A hydroponic growing system uses a plurality of vertically supported pots suspended one above the other, each pot being removably held on a supporting ring attached to a plurality of vertically extending chains, or the like, supported from above. The hydroponic growing system includes a water delivery system which feeds the water to the top-most pot which drains to each next pot and to a bottom reservoir where it may be pumped back into the water delivery system.

Abstract: An assembly for coupling to a downpipe of a building, including an elongate base support structure, said base support structure having a direction of extent that is coaxial the downpipe; and a series of receptacles coupled in spaced apart positions to the base support member in the direction of extent, wherein each receptacle of the series of receptacles is shaped to hold soil for growing plants therein.

Abstract: A hydroponic plant cultivation apparatus including a reservoir having a base defining a first portion of the reservoir and a cover defining a second portion of the reservoir. An upper opening is defined in the cover. A planting column with a hollow interior is positioned above the upper opening. At least one planting port is defined in the planting column. A conduit can pass through the hollow interior of the planting column, the conduit fluidly communicated with the reservoir. A fluid distributor is positioned atop the planting column, the fluid distributor in fluid communication with the conduit. Fluid is selectively circulated from the reservoir through the conduit in the planting column to the fluid distributor, where the fluid is redirected down the hollow interior of the planting column and back to the reservoir. A hydroponic plant cultivation apparatus including a reservoir positioned on a plurality of rollers.

Abstract: The present invention is directed towards an improvement to hydroponic systems using vertical platforms to cultivate plants. A horizontal platform, and system using the horizontal platform, designed to provide for plant growth in a soilless growth medium using an ebb and flow system to cultivate plants within the horizontal platform is provided. The horizontal platform uses a floating valve system to control the amount of fluid cycled through the horizontal grow platform. The present invention further provides for a device that converts a hydroponic vertical tower to a hydroponic device using a vertical tower platform which is designed to circulate nutrients for plant growth in a soilless growth medium and a horizontal platform designed to provide for plant growth in a soilless growth medium using an ebb and flow system to cultivate plants within the horizontal platform.

Abstract: A device for growing plants is provided. The device has a panel assembly on which a one or a plurality of nutrient flow channels is supported to provide nutrient flow passages from an inlet at an upper region to an outlet at a lower region of the support panel. A plurality of grow pockets is supported on an opposite side face of the support panel, the grow pockets in alignment with the nutrient flow channels. Each grow pocket has a plant access opening. A fluid aperture in the support panel is disposed at a lower region of each grow pocket for fluid communication between an interior of the grow pocket and the aligned nutrient flow passage.

Abstract: The invention relates to an assembly for arranging plants vertically, with a built-in watering system, applicable to plants contained in plant pots (11), consisting of a framework with individual supports for plant pots, a water container provided with a trickier in the upper part, a support with a drainage collector in the lower part, and plant pots, used to carry water to the upper container where it passes through the trickier and falls to an relief (8.1) in the body of the plant pot just below. From there, it is guided to an inner cavity (8.2) which finally allows the water to enter the plant pot. The excess water is ejected via a drainage opening with a conduit used as an extension and falls to the relief of the plant pot directly beneath, in order to repeat the process in the plant pots. These elements create a supporting structure for arranging plants vertically, with a watering system that operates under gravity.

Abstract: The apparatus provides a method for assembling a vertically oriented structure for plants and flowers. A planter assembly which accepts soil and plants is attached to a base assembly which supports the planter assembly. The attachment of the planter assembly to the base assembly is via a plurality of rigid panels inserted into slotted cavities on both the planter assembly and the base assembly wherein the panels are aligned and attached uniformly and directly adjacent to the outer surfaces of the planter assembly and the base assembly sides. When upright, the assembled structure descends in width from top to bottom.

Abstract: A growing medium for a plant production apparatus utilized in greenhouse crop production is provided. The growing medium comprises a fibrous, non-woven matrix media material wherein the media material is constructed from a plastic material.

Abstract: This invention concerns apparatus for growing plants comprising a column (100) of pots (102) stacked one above the other to define an enclosure for housing plants. Each pot (102) defines a chamber (104) for holding a plant. Separators for separating pots of the column are provided and the separators define an enclosed headspace around a top of at least two of the pots where plants project from the chamber. The chamber comprises a passageway (106) that provides a continuous flow path for air through the column (100) without requiring the air to flow through the chamber (104). This flow path includes the headspaces above the at least two of the pots (102).

Abstract: Embodiments include a containment unit for a living wall that includes a rear wall with two side walls, a top and a liquid collection trough at the bottom with several ribs extending down the front of the containment unit between the side walls, where the ribs are angled and arranged relative to each other to define vertically stacked openings between sequential ribs that forms horizontal growing surfaces when the containment unit is filled with loose plant growth medium.

Abstract: A green wall planting support apparatus includes at least one hanging plate, a plurality of containers and a water supply system. The hanging plate includes a channel portion that is elongated in a lengthwise direction of the hanging plate and that has a first channel, and a hanging portion that is made in one piece with the channel portion and that is disposed in the lengthwise direction. The containers are detachably connected to the hanging plate for receiving plant and each includes a hanger portion that is detachably connected to the hanging portion. The water supply system includes at least one water dispensing unit that is mounted on the channel portion for conveying water to the container.

Abstract: The stackable plant container module of the present invention is adapted such that a plurality of plant container modules will nest together for storage and/or shipping while allowing the plant container modules to be stacked vertically into a multi-level plant tower. The stacked plant tower includes a water bowl, defining a reservoir for receiving water, carried by the upper most plant container module, and a water tray disposed between stacked plant container modules. The stacked plant tower is adapted such that the water bowl is in fluid communication with each water tray, such that the stacked plant tower incorporates structure for managing the flow of water through the stacked plant tower.

Abstract: Method and apparatus for growing plants in vertical stacks by providing vertically stacked, interconnected pairs of plant platforms and light trays carrying growth promoting light sources. Each light tray is suspended below the underside of the next above plant platform. The stack is vertically raised in succession whereby the plant platforms are suspended and vertically spaced from each other. Thereafter, plants are placed between suspended platforms under the light trays which are regulating during periods of plant growth and non-growth.

Abstract: A flowerpot assembly is provided a support including a plurality of equally spaced openings from top to bottom; and a plurality of flowerpots each disposed on the opening and including a container and a conduit wherein the container includes a storing section for anchoring a plant and a water distribution device on a bottom of the storing section, the water distribution device including a coupling, a wall, an inlet, and an overflow exit; wherein a bottom of the conduit is connected to the water distribution device; wherein the inlet communicates the conduit with the storing section; wherein the wall is around the coupling; and wherein the overflow exit is between the water distribution device and the wall and extends out of the container.

Abstract: A vertical planting tray comprising a plurality of substantially horizontal shelves held together by outer side walls and a plurality of vertical struts located therebetween with the struts connected to and supporting the shelves, the struts being substantially thin and narrow an defining a plurality of planting stations with the horizontal shelves in which vertical plants may be grown. The substantial open wall structure between stations permits improved plant performance.

Abstract: Provided is a cylindrical container for plant growth substrates in which plants of diverse species may be grown all over its external surfaces, and for water, air and nutrients to be supplied to their roots through systems of pipes or cavities internal to the cylinder and embedded in the substrate.

Abstract: An apparatus for a vertical or angled arrangement of hydroponic cultivation of plants includes at least one module defining an inner space containing at least one nutritional substrate and plant. The module includes a front wall and a rear wall secured to the front wall. At least the front wall includes at least one opening for the plant to pass through. The front and/or the rear wall includes an attachment area for attaching the module to a mounting. The front wall and/or the rear wall has overlapping edges enabling, when the apparatus is installed on a green roof or a green wall with at least two adjacent modules, overlapping of the modules, at least partially.

Abstract: Disclosed is a containment unit for a living wall that includes a rear wall with two side walls, a top and a liquid collection trough at the bottom with several ribs extending down the front of the containment unit between the side walls, where the ribs are angled and arranged relative to each other to define vertically stacked openings between sequential ribs that forms horizontal growing surfaces when the containment unit is filled with loose plant growth medium.

Abstract: A garden module for a vertical garden system, the module comprising: a body having a back portion providing a mounting arrangement in the form of one or more vertically extending recessed portions. A vertical garden system comprising: a plurality of garden modules; at least one upright; each garden module having a back portion providing a mounting arrangement in the form of one or more vertically extending recessed portions for accommodating a respective one of the at least one upright.

Abstract: A plant develop device includes a tubular structure, a water supply device, and a soil package. The tubular structure forms a plurality of growth holes, and a plurality of water conservation grooves are formed at a bottom of an internal surface of the tubular structure. Growth medium is wrapped by the soil package therein, and a through hole corresponding to one of the growth hole is formed on a surface of the soil package. The plant develop wall of the present invention includes the plant develop device, a rack, and a positioning ring which is used to fix the tubular structure on the rack. Thereby, the present invention can provides sufficient room for plant growing, improved fixation, and water regulation.

Abstract: A vertical gardening apparatus for supporting the growth of a plurality of plants in a vertical array. The apparatus includes a hollow, plant growth chamber for receiving a planting medium. A plurality of planting ports are formed in the wall of the growth chamber to provide aeration and access for plants to be planted in the planting medium. A water distribution system is provided for delivering water and plant nutrients to the planting medium and includes an external water line assembly that distributes water from a water source to an internal conduit housed within the plant growth chamber.

Abstract: A planting container body (1) has a bottom wall (3) and side walls (4) forming a planting space (2) and also has a water-holding section for holding planting water supplied to the planting space (2). The water-holding section has a water discharge opening (12) for overflow. In a horizontal position (A) in which the planting space (2) opens upward, the bottom wall (3) and the side walls (4) form a horizontal water-holding section for holding planting water. In a vertical position in which the planting space (2) opens sideways, a vertical water-holding section for holding planting water is formed by the bottom wall (3), side walls (4), and a dam section (8) formed facing the bottom wall (3) on the side wall (4) that is the bottom surface. A water discharge start section of the water discharge opening (12) is located at a position a predetermined distance away from the bottom wall (3) and a predetermined distance away from a side wall (4).

Abstract: A tower planter growth arrangement comprising towers (2) allowing plant/crop production to be commercially competitive with commonly-used field cultivation for selected crops and ornamental plants. It has risers (12) of different lengths that permit a variable number of growing pots (4) in stacked array on a center support pipe (6), a new pot (4) design configured for improved drainage and reduced shipping damage, modified tower rotation plates (8) adapted to accommodate the new pot (4) drainage design, optional protective sleeves (20) for pots (4) that extend their useful life, an optional ground pot (18) that can collect excess water/nutrient drip for growing bonus plants/crops, an optional weighted support pot (52), an optional overhead nutrient distribution system (24), optional internal ground supports/stakes (14), optional support plates (10), and optional use of a nutrient distribution pot (22) above the top growing pot (4) in each tower (2).

Abstract: A planting container is suitable for forming planting columns by using ones with the same structure three-dimensionally stacked. The planting columns are arranged around a center line parallel to the gravity direction to set up a planting tower. The planting container includes a bottom wall and a side wall. The side wall extends from the peripheral of the bottom wall and both walls define a containing space. The side wall has a planting opening communicating with the containing space. The side wall has a top end and a bottom end. When two containers with the same structure are three-dimensionally stacked by each other, the bottom end of the upper container engages with the top end of the lower container. The side wall laterally tilts towards the center line relatively to the bottom wall, so that the planting column tilts towards the adjacent column and tilts towards the center line.

Abstract: A plant hanger with a watering system includes a weighted base adapted for stable placement on a ground surface and an upwardly-extending support post. A plurality of adjustable hanger arms extends perpendicularly outward from a central hub affixed to the post. A watering system is connected to an existing water source, which delivers water to an inline plant food reservoir for introducing plant food into the water. The water is distributed to each arm through a water distributing manifold attached to an upper end of the post and in fluid communication with the water source.

Abstract: A device for growing plants on a substantially vertical surface includes a carrier and a flexible curtain wall substrate suspended from a track of the carrier. The curtain defines an array of pockets for receiving the plants to be grown and a growing medium, each of the pockets having an opening proximate a top end thereof. A water irrigation system is integrated into the flexible curtain and includes a water emitter for each of the pockets, the water irrigation system being one of connected to and connectable to a water supply. A control system includes moisture sensors connected in each respective pocket. The control system is adapted to activate the water emitters of the pockets.

Abstract: A green wall planting support apparatus includes at least one hanging plate, a plurality of containers and a water supply system. The hanging plate includes a channel portion that is elongated in a lengthwise direction of the hanging plate and that has a first channel, and a hanging portion that is made in one piece with the channel portion and that is disposed in the lengthwise direction. The containers are detachably connected to the hanging plate for receiving plant and each includes a hanger portion that is detachably connected to the hanging portion. The water supply system includes at least one water dispensing unit that is mounted on the channel portion for conveying water to the container.

Abstract: A vertical planting tray comprising a plurality of substantially horizontal shelves held together by outer side walls and a plurality of vertical struts located therebetween with the struts connected to and supporting said shelves, said struts being substantially thin and narrow and defining a plurality of planting stations with said horizontal shelves in which vertical plants may be grown. The substantial open wall structure between stations permits improved plant performance.

Abstract: A vertical planter and gardening wall comprised of base planter blocks that are identical to each other and end blocks that are identical to each other. The blocks are stackable and interlock. The invention can be used by gardeners to cultivate and display their gardens indoors or outdoors in a restricted area.

Abstract: A power-saving flowerpots capable of serial connecting with other flowerpot includes a planting tank having a horizontal plane and an inclined plane at an upper side thereof for planting; a water tank connected to a lower side of the planting tank; the connection of the planting tank and the water tank being formed as an L shape; an interior of the water tank being formed with a water draining channel; an upper side of the water draining channel being formed with a communication hole so that when the water level in the water tank is over a lower edge of the communication hole; water will flow into the communication hole from the water tank. A plurality of flowerpot can be installed as a first row by a retaining rod to pass through all hooks of the flowerpots; and the water tubes of the flowerpot are connected one by one.

Abstract: A plant develop rack includes a base, plural soil packages, a water supply device, and a water collecting tank. Plural rack units are disposed on the base and are arranged vertically. Each soil package encloses growth medium and plant and forms plural openings for the plant to extend outward. The water supply device is located above the rack units. Thereby, when the water supply provides water to the most upper rack unit, water may enter the soil package on that rack unit to nourish the plant. Thereafter, excess water may flow downward via draining holes of the rack unit to reach lower rack units. Thus, the soil packages on all rack units can acquire sufficient water for growing the plant.

Abstract: Various embodiments provide systems and methods for a vertical planter. Systems and methods according to various aspects of the present invention may comprise a planter system configured for growing plants in horizontal rows wherein each row is arranged vertically with respect to each other row. The planter system may comprise a planter container, a container support, and a vertical support. The vertical support may be coupled to a structure. The container support may be coupled to the vertical support and configured to support the weight and form of the planter container.

Abstract: A structural module (10) for use in water irrigation, water drainage, water retention and water filtering systems, comprises a load bearing base unit (10) and porous material (15), wherein the base unit has a top wall (11) and a bottom wall (12) spaced therefrom by one or more supporting elements (13, 20) so as to define a volume between the top and bottom walls. The base unit being provided with apertures (17, 18, 19) to permit the flow of liquid into and out of the volume. The porous material is a block (15) foamed polymeric material which occupies a substantial portion of the volume within the base unit and absorbs and retains water that passes through the apertures.

Abstract: A watering/drainage arrangement for a multi-layer horticultural structure wherein during watering, water from a series of water release outlets is sprayed through an aperture of a flood tray which fills to a selected level and maintained at this level by the continued supply of sprayed water through the water release outlets and the drainage of overflow via a weir edge of the flood tray and during drainage, supply of water to the release outlets is terminated thereby preventing water being sprayed into the aperture of the flood tray thereby allowing the discharge of water through the aperture of the flood tray.

Abstract: A vertical gardening system includes at least one sheet of geosynthetic material hung generally vertically, and forming vertical channels extending top to bottom of the sheet on a rear side and including a plurality of small upwardly-open individual pockets on a front side and growing medium on both sides of the at least one sheet and located in both the channels and the pockets. A related method includes providing a portable stand and supporting on the stand a sheet with vertical channels and pockets as defined above, growing plants in the pockets with their roots extending into the channels, and moving the stand to promote plant growth, including one of moving the stand to orient the plants toward sunlight during daylight, or moving the stand between a first location of optimal sunlight and a second location of optimal protection against freezing.

Abstract: A planting container is suitable for forming planting columns by using ones with the same structure three-dimensionally stacked. The planting columns are arranged around a center line parallel to the gravity direction to set up a planting tower. The planting container includes a bottom wall and a side wall. The side wall extends from the peripheral of the bottom wall and both walls define a containing space. The side wall has a planting opening communicating with the containing space. The side wall has a top end and a bottom end. When two containers with the same structure are three-dimensionally stacked by each other, the bottom end of the upper container engages with the top end of the lower container. The side wall laterally tilts towards the center line relatively to the bottom wall, so that the planting column tilts towards the adjacent column and tilts towards the center line.

Abstract: A planter device includes an upper planter pot and a lower planter pot attached to a supporting device, the planter pots each include a port coupled to a tube, the upper planter pot includes an outlet conduit coupled to the tube of the lower planter pot, a water supplying pipe is connected to a coupler for supplying a water to the tube and the port of the upper planter pot, the coupler includes a bore for supplying the water from the water supplying pipe to the tube, and includes an outlet channel communicative with the bore of the coupler for supplying the water out of the coupler and into the upper planter pot and for easily and automatically watering the plants contained in the planter pots and for economizing the water.

Abstract: In a preferred embodiment, a freestanding vertical horticultural apparatus for commercial and/or home use for growing of plants in containers includes a plurality of containers arranged in a plurality of mutually vertically spaced groups which are rotatably supported in brackets by an elongated vertical spindle through which is routed a pressurized fluid supply line which is coupled to a spray emitter by way of a flow adjustment valve. At a flow rate determined by the valve, the emitter sprays irrigation fluid inside a hollow distributor body positioned at the top of the apparatus. The lower portion of the distributor body is segmented into a plurality of sumps, each of which feeds a substantially uniform quantity of the fluid under gravity to each respective one of the containers by way of a respective fluid delivery tube, one of which is coupled to the lower portion of each sump.

Abstract: Methods and apparatus for vertical hanging plant container according to various aspects of the present invention comprise a container comprising a moisture impermeable reservoir and an air and moisture permeable zone. The reservoir may be disposed along a bottom section of the container to serve as a moisture storage region allowing moisture to be wicked upwards by the soil in the container. The air and moisture permeable zone may be located above the reservoir in at least one sidewall of the container and allow for the transfer of air and moisture between the soil and an exterior environment surrounding the container.

Abstract: The invention includes a box, vertical and horizontal dividers, a plant-growth mat, and a mounting bar. The dividers are permanently linked to form an insert, which slides into insert grooves inside the box. Insert grooves have upper and lower rails. At the insert groove openings rail ends feature upward bends. The plant-growth mat is secured against the box inner-back by the insert which is prevented from sliding out by the upward bends of the lower rails. A support mount and a fastener on the back of the box and compatible groove surfaces on the mounting bar prevent box movement when mounted. The invention increases the rigidity of the dividers and reduces their deformability. It facilitates inserting the integrated dividers into the box with convenient insert grooves. The plant-growth mat can store water, prevent soil erosion, and provide aeration to plant roots. The mounting bar stabilizes the module for easy installation.

Abstract: This invention concerns apparatus for growing plants comprising a column (100) of pots (102) stacked one above the other to define an enclosure for housing plants. Each pot (102) defines a chamber (104) for holding a plant. Separators for separating pots of the column are provided and the separators define an enclosed headspace around a top of at least two of the pots where plants project from the chamber. The chamber comprises a passageway (106) that provides a continuous flow path for air through the column (100) without requiring the air to flow through the chamber (104). This flow path includes the headspaces above the at least two of the pots (102).