It really hit us yesterday. Freezing. Today won't get past 37. Just a few days ago I was running around figuring out how to cool the GH off.
Went down to 27 last night and I had to add a third 65 watt incandescent bulb to the "cathedral" popup GH. So there are now 3 of the 65 watts in there plus two strands of the incandescent red Chistmas rope lights. Have insulation board all around the side walls (about 3' tall) and have tented the plants with the mylar blankets. That's keeping it at 60. I have bees in there! And lemons, tomatoes and jalapenos (along with flowers) that are all producing !
They "big" GH is wrapped in the solar pool cover and with the T5 grow light, 3 of the 65 watt flourescents, and several strands of the rope lights, it is staying around 54 during the day. At night I have to run the heater - and on a higher setting. When it goes down into the twenties it's a whole different ball game.
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