A structure to hold a plurality of potted plants and other objects in aconicaltree-shaped formation. The structure includes a plurality of horizontallyextendinghoops, vertically spaced apart one from the other and concentric about acommonvertical axis, the hoops supported in a vertically spaced apart stack bygenerallyvertically extending struts attached to the hoops. Also included are:arrangementsfor covering the structure so as to obtain a greenhouse effect； arrangementsforrotating the structure； arrangements for watering plants on the structure；plant potshaving features particularly suited for use with the structure； and variousitems forinstallation on or in the structure.
