On Feb 9, 10:26 am, "jadel" wrote:
On Feb 9, 10:07 am, "Ray B" wrote:

When I lived in SC - usually very sunny in the winter, even if it did get
pretty cold at times - my "benches" were bread flats on top of 55-gallon
drums filled with water and painted black to help solar gain.

That technique worked so well that it was tough to get phals to bloom - it
just wouldn't cool enough unless I opened a vent. Of course I did have 30
drums in a 14' x 14' greenhouse.


Hmmm... according to my hasty calculations, those drums, including
the space between them, took up about 90 square feet of the 196 sq/ft
area. Did you put them all in the center and work around them?

J. Del Col