Greenhouse: considering a FarmTek Premium Solar Star GH, 1 by sandy0225

sandy0225 wrote:
zone 5 Indiana here. I have two farmtek greenhouses, both solar stars and I love them.
One's 20x20, one 26x36 and both of them are too small. Soon we're going to expand the 26x36 up to 96' long.

You don't need any foundation for them at all. You drive ground stakes in the ground, hook baseboards to them and then install the rest of the structure. You use good augers to secure them into the ground too. I use mine commercially with benches to grow plants in containers for sale, but many use them to plant their plants directly in the ground as it seems you're wanting to do.
The instructions are very comprehensive and easy to follow. Mine arrived in good shape, except there was one damaged polycarb panel on the larger one, and they replaced it with no problems. I think now you can even look at the instructions for installation online before you buy the greenhouse so you know what you're getting into.

18x32 will get small for you fast too! but you can expand them later on......