The black is cheaper, so that's what we use
I can't afford aluminet or white yet!
We use anywhere from 30% to just shade on the big house where we grow production, to 50% for hostas in the shade house. We use knitted because if it gets a hole in it or you need to cut it, there's no sewing involved.
The 30% shade along with the fans and the roll up sides mean that it's usually about 10 degrees or so warmer in the greenhouse than outside. We also run misters that come on for 2 minutes every other hour or so starting at 11, 12, then 1, then 3 to keep the humidity up and lower the risk of spider mites.
The last shade I bought was from greenhouse megastore (online) but I've gotten it from growers supply/farmtek too.
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Sandy Burrell
Northern Tropics Greenhouse
1501 East Fuson Road
Muncie, IN 47302
www.northerntropics.com
specializing in bananas, heirloom tomatoes and water gardening plants~
check out our new online store at our website!