What is a greenhouse base?
It is better described as an upstand on which the greenhouse sits, as opposed to the foundation or floor on which the greenhouse is sited. This upstand base is normally about 5″ tall and raises the greenhouse to an acceptable internal level. This creates a step. More importantly an upstand base allows the lipped edge of the greenhouse frame to fit over it perfectly. Do I need a greenhouse base? In most instances the answer is yes. But you do not have to buy the pre-formed version, you can build it yourself out of bricks. This is more solid. If you wish to do this you will need to obtain BASE DIMENSIONS. Do I need a foundation or floor? A prepared concrete or slabbed foundation is ideal. What if I want to plant in the soil under the greenhouse? You can excavate the ground around the perimeter of the greenhouse to create a strong foundation. Dig out a spades width to a depth of 5-6″ around the edge. Fill the bottom 3-4″ with rubble, hardcore, stones etc. and crush it in. Either add 2-3″
