Here is my new greenhouse, made from a old trampoline frame. I would probably call it more of a plant shelter as its aim is to keep inclement weather off my seedlings rather than a place in which to grow mature plants. The metal framework is held together with pressure treated rough sawn timber which was the only main expense at approx. £50. The polythene (3 sheets) I had lying around and the inside table was made from some old palettes. Wood chip was used for the floor as I have quite a large pile of this to use up. The ploythene is attached to the circular frame using small lengths of black plastic pipe cut into a ‘c’ shape so they just clip over the metal work holding the sheets in place. Staples, screws and large cable ties hold everything in place. The back was left uncovered so I would get good ventilation and to ease construction, with the structure placed against a wooden fence (to which I might fix it later). The door just lifts on and off and is covered with fine netting I found and a bit of polythene. If it lasts me a few years I will be happy and if I have to rebuild it then that will keep me occupied for a few hours when necessary.