I would like to heat it but as of right now it all seems to be working out. Everything has sprouted but it did snow last week which dropped the temp to 20 one night and a couple cukes died. Light hits the greenhouse about 9am and goes away in late evening. My worry is that summer will make it unusable :(

Robert: The spinach is just growing in topsoil. As for the timbers, the pictures make it look like the timbers are flush with the ground, but they are buried at this point and have about 6 inches of soil/clay packed over them. With the weight of the greenhouse, timbers, and soil I didn't feel the need to also drive anchors into the clay... lets hope that I never have occasion to find I was wrong! Julia: Exaco Trading has roughly an hour's worth of Riga assembly videos on Youtube that cover just about everything. They will also mail you a video in advance of receiving the greenhouse. There were some slight variations between the Youtube videos and the DVD, but the vast majority went together the same. I did have one or two issues putting it together where the parts did not match the directions (the door handle is one example that comes to mind) and I was able to talk with Alan at Exaco to walk me through the updates. Alan said they were working on an updated DVD to reflect the parts changes. For the above mentioned door handle, the parts list and the video both show a small metal door handle with some additional pieces, and what was received was a rather large plastic "loop" handle with no additional pieces. The variations were minor, though. Just make sure you open up all the boxes if you cannot find the instructions in English! They send the original instructions (printed in German) with the DVD packet, but I found an English translation at the very end when I opened the last box containing the window kits! Oh, another tip I'd suggest is to have some duct tape (or other easily visible tape) to mark the UV-coated side of the polycarbonate panels when you are removing the film prior to installation. Once you remove the film, it's very difficult to tell which side of the panel has the UV coating. I did not get the sun shade cloth with mine. I am planning on making my own based on another thread found here that should work fine with the automatic openers: http://forums2.gardenweb.com/forums/load/strucs/msg081228458217.html?1 The shade panels will go on the inside and will not cover the vents.

If you're looking to farm in there, plant some things that don't need a lot of heat. 1 plant of a hundred things is not a good way to do it until you learn what your greenhouse climate is. Keep in mind that good air circulation is as important as any heat you may be trying to capture. Lettuce is easy, but also prone to aphids. You could really extend your season if you pick plants like Brussel sprouts that can take heavy frost without turning into a brown worthless plant. The other members of the Cole crops are also useful (cauliflower, brocolli, etc). Leafy greens and radishes are quick and will grow in cool soil. Since you will gain about one zone, even without heat, when you see us planting outside, it will be time for you to sow indoors (springtime). If you heat it even a little, you will be surprised at the gain. Mine is glass (poorer insulation than a double wall plastic), and I figure that the temps have to drop to very low 20's F (about 22°F) before it would freeze inside. So even without heat, I gain about 10 degrees F.

I don't think you will get nearly enough light to grow what you want without supplemental lighting. Especially vegies of any sort, without more hours of direct sun, they will be too etiolated grown indoors with just a few hours of direct sun. A south facing location with the same limited light due to tree shading would be preferable, as it is getting some light all day long, and not just in the afternoon.