13- staggered roof greenhouse plan. build your own greenhouse with these greenhouse plans that feature a staggered roof for optimum light reception. the sturdy wood frame is covered with clear plastic and the large interior space will enable you to grow plenty of vegetables and flowers.. This article is about free wood greenhouse plans.if you want to build a construction to store your plants during the cold winters or to grow your own vegetables, we will show you all you need to know before starting the project.. These 8