Blue
I have also seen a variation with actual white nursery covering and at the bottom a T is place sideways on the ends and regularly across the rest of the structure so a pipe can also go across the bottom - grommets are placed along edges of the cover and bottom and metal rings are used to secure to the hoop frame - this way the cover can be pulled up or lowered to allow the plants to back in the sun and moved back at night to protect from cold - this is great for areas where heat is a problem - also where there is heat and heavy sun a nursery shade cover can be raised to help the plants
Dennis
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