Are you using the Riga foundation kit? If so, I can share the details on what we did with ours. We located where each corner was going to be and dug a concrete cinder block into the soil below each corner of the frame. The elevation should be such that the top of the frame is just a bit (2 inches?) above the soil line. Put the frame so that each corner rests on a cinder block. Check the level. Go to the highest corner and shave the dirt out below the cinder block. Repeat this process until things check out level. The cinder blocks under each corner should provide a firm and level place for the foundation. Getting the frame level is essential, as building it up will be next to impossible if it's not level and square. We took an additional step and dug a 16" trench underneath the foundation frame and put 4" thick styrofoam sheets in there. (Sort of like a deep, narrow moat filled with styrofoam) This gave us an insulated perimeter below the soil surface, which keeps the cold soil right outside the greenhouse from sucking the heat out of my warm soil inside the greenhouse. Happy digging! As you probably know, there are no shortcuts here, but the payoff is totally worth it. :)

I would give it a try with a couple, to see how you like it. They grow differently when wicked, it seems. At least mine do. The leaves tend to stick up more, and the new growth tighter. But, it grows at a more consistent rate, and I don't get the setbacks that not being able to water soon enough causes. So, the plants get to just keep on growing, rather than growing, stress out from lack of water, lose some leaves, and then recover. That whole cycle also delays flowering, for my plants. I got tired of it. But it's nice to test out wicking for yourself before converting them all. For instance, it shows you you've got your potting mix in the right proportion.

I have 3 orders ready to go! Next month, hopefully. I'm planting mostly Paste tomatoes this year, all colors, from white to black. And mild er jalapenos, going to can beautiful jars of salsa. Now is the only time I can see all those beautiful jars lined up!!! And, for the first time in years, I'm going to have a traditional garden too. Corn, winter squash, sweet potato's and onions. All fenced too tight for deer, rabbits and me!! Its planted--now grow! I have soo many seeds already--but still must try something different.

Curious about the aerobic system - We live in Houston Texas and have an aerobic system it works great and that is all that is allowed in Harris and Montgomery Texas. I did not know they would work in a climat that had a lot of freezing?