Abstract: A tensile support device comprising a pair of rigid, elongated members which are horizontally disposed and attached closely together at their outer ends and held widely spaced apart by a cable or strap at their inner ends which rest against a supporting surface, such as a wall, a tree, a pole, or a plurality of balcony posts. A tensional support cable is fastened at its lower end to the outer ends of the members or to the connection between the outer ends of the members and at its upper end to the supporting surface, or to a window sill by using an auxiliary bracket, at a point substantially above the inner ends, whereby a compressive force is created along the rigid members when a plant container is hooked over the connection between the outer ends.