What greenhouse companies/manufacturers would you suggest? What website(s) has the most bang for the buck? And how insulated should I get my greenhouse? Remember Winters can get down to the 10 degrees F in Winter and can get up to the 90s F in Summer.

Sounds like you've really thought this project out thoroughly! I think I follow what you have planned. The main criticism I have is with the 6-mil film you plan to use. Having used 6-mil myself for several years before arriving at the product I use now, I can say that it's flimsy and easily prone to tearing. Commercial gh's that use inflated film covering will use 11-mil on the exterior, and, if they're trying to cut costs, will use the 6-mil on the inside because it doesn't require as much durability. By attaching your film just on the edges of the structure, you'll be asking for trouble. 6-mil stretches, and no matter how tight you pull it, it'll still flap in the wind. Also, with so much potential force focused on a single attachment point along the edge, it'll be prone to pulling free...unless you somehow roll it a couple times around something to evenly-distribute the force. The problem with the wind blowing over it is the element of "lift." Depending upon the wind direction, even with the ends open, the covering will alternately want to rise, then snap back down against the frame. A few hours of windy conditions is all you could ask of 6-mil. Even though the cost is higher, I'd highly recommend the 5.2-ounce translucent tarp linked below. It's 12-mil, and has a woven fabric of fibreglas "tapes" inside the plastic for strength. It's like iron, doesn't stretch, and can withstand just about anything you throw at it. Since it's stronger, and heavier, you'll have less of an issue with it tearing free from attachment points. You also may be able to get away with wider spans, saving you on some rebar. Another plus is the light diffusion through it -- no possibility of burning tender plants/seedlings. I'd have much greater confidence in this material meeting your needs, only attaching it along the edges. The one weakness as I see it for your application is that the largest width available is twelve feet. FarmTek has two products that would be suitable for this purpose. The first one is their Super Tape Seaming & Repair Tape, which is $22.95 for a 3"x60' roll, or $32.95 for a 6"x60' roll. The second is the Premium Repair Tape (product #105383), which is $71.95 for a 4"x100' roll. I'd feel safest sealing both the outside and inside edge, with a 6" overlap of the tarp. Hope your idea for securing the framing against possible racking works OK. If it didn't for some reason, you could retrofit easily with a support line and stake on either end. If you can find a good source for purchasing the wrapping material (to cover the rebar) you described in bulk, that's probably a good bet. I know FarmTek sells something for this purpose, but I'll be darned if I can find it now. The only thing I'd suggest is to use a good-quality tape. I know duct tape is a popular do-all, fix-all, but it performs miserably whenever moisture and heat are present! For this reason, you may want to consider a wire-wrap over the packing material, as an inexpensive material to tightly secure it. Removing the covering in the summer will expose all your handiwork to the elements, so that's another thing to consider. All that work to wrap your rebar may not survive unprotected. Hope there was something helpful here. -Bruce Here is a link that might be useful: 5.2-ounce fabric at FarmTek

You can get different "additives" or treatments to poly that help in the GH. One is an anticondensate treatment that you mention above. Another potentially important one is UV treatment, which may extend the life of your film. Another feature of some films is IR treatment. Solar radiation exists as UV, PAR (the plants use this) and LIR. The heat that builds up in the GH during the day is re-emitted at night, but only as LIR. Regular poly is relatively transparent to LIR, so you lose heat more quickly at night. IR films are relatively opaque to LIR and so they will hold the heat better at night. Glass and PC are opaque to LIR, BTW.

May is not going to be a good time to plant shrubs for the landscape. They will not have time to establish good roots befor the heat sets in. If she has time to see that they are well watered, they might do OK, but if she can wait until the fall or next February or March, it will be better. The Great Southern Nursery and Hester and Zipperers are two good ones. Hester's has three different stores in Savannah. There are smaller ones. There are also specialized ones such as Joiner's Daylilies. Joiner's will have the display garden open in May. It's well worth a trip. Just be sure that you don't get anything from California, especially from Monrovia, as Georgia and other states have placed a quarantine on shipments from there. The Sudden Oak Death fungus seems to be spreading from there. There are other nurseries, but I think they are strictly wholesale. PB Here is a link that might be useful: Joiner Daylillies