8 x 6. The Growhouse Lean to greenhouse is a finest top quality growing area for your garden. Lean to greenhouses have many benefits the sun heats up the wall the lean to is attached to & when night comes heat is slowly released back keeping plants & seedlings warmer than traditional apex greenhouses, lean to greenhouses are also a great way of making the most of the space in your garden. This lean to has been constructed using some of the finest materials from toughened glass to cedar wood which is an almost maintenance free wood. Manufactured by Growhouse.