Abstract: A plant enclosure for outdoor use has a hollow body with open upper and lower ends and ventilation and drainage openings. In order to permit a desired amount of water to be conserved within the base of the enclosure, the openings are positioned such that a portion of the body may be buried in the soil, with the openings spaced above the soil surface. The base of the body has plant root openings, positioned to be buried beneath the soil surface. These openings are sized to permit plant roots to grow laterally outwardly close to the soil surface, beyond the perimeter of the enclosure. A lid is engageable to the upper rim of the body. The lid have a recessed portion on its upper surface to that capture rain or sprinkler water. Apertures within the lid permit the captured water to drain into the enclosure. Preferably, the body and lid are clear or translucent to create a greenhouse effect during daylight hours.