A seedling tray includes a top body member constructed of a rigid solid plastic material having a plurality of planting cells formed in an upper surface with each of the cells converging downwardly and inwardly to define an opening at the bottom thereof. A plurality of air chambers are formed between adjacent ones of the cells which are closed at the bottom by a bottom plate member constructed of a rigid plastic material which is fixedly attached to the body member and which has openings therein corresponding in number and alignment with the openings of the bottoms of the cells which are sealingly engaged with the openings in the bottom plate member.
