Sheldon wrote:
On Jul 6, 10:02?am, "Bob F" wrote:

"Sheldon" wrote in message

I was recently told by someone using it, that that stuff passes air
and moisture.


All I've seen is just plain old plastic sheeting. I buy lots of stuff
from Lee Valley. They say to punch holes by hand so water can pass.
I think this red plastic is a gimmick, and an expensive gimmick
because it wont last long... adn constant exposure to the sun's UV
will change the red to chalky pink.

There is no way any of the plastic stuff can pass air and water. It is
a mystery to me how the plants get any water I guess enough moisture
seeps over from the uncovered areas and none can evaporate from the
covered areas.

I assumed the red was a gimmick also and only a side by side test will
prove it. We will do that next year but there is some logic to the red
light being reflected up to the bottom of the leaves but it needs to be
proven.

js

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