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Old June 9, 2014   #2
PaulF
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Join Date: Jan 2006
Location: Brownville, Ne
Posts: 3,276
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The University of Nebraska Extension has done studies about using milk cartons as protection from late frosts. Their conclusion was that the temps inside the milk cartons was actually lower than the outside temps. They do not recommend milk cartons other than for wind protection.

I'd bet the black pipe would work better. With all the tomato protection being done with milk cartons, I know the study opened lots of eyes in this area.
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