hugobee, I'm in southern Colorado in the Rocky Mountains. The altitude here is 7,763 feet. Garlic & onions, yes, we are kindred spirits! :) I added some cheap potting soil from Family Dollar (all I had at the time) and mixed it into my sandy garden soil. I put chicken wire beneath the tires to prevent moles, although, I think they might be small enough to go through that, in retrospect. The soil here is very alkaline, so I'm surprised they did so well, without any correction of the ph. Perhaps they like alkalin soil? Who knew? I just mulched with the grass clippings so the snow and ice wouldn't be too hard on them, and when they came up I was excited. I watered them when they got dry, and later on not as much. I probably could have given them more water, but they seemed to develop nicely without more. I guess it depends on the weather, though, really. The sun's really a scorcher at this altitude. In fact, my son told me I probably wouldn't have to heat the greenhouse this winter. I'm preparing to, anyway, though. I found a way to heat it, with solar, without solar panels and with very little electricity (just a little fan) by heat exchange. I found it by accident - but are there really accidents where the Lord is concerned? Anyway, for you and my friends here, this is a great way to heat a greenhouse in the winter... http://www.youtube.com/watch?v=a62mZMIMpc0&feature=related