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Old February 1, 2018   #107
Join Date: Mar 2016
Location: NC
Posts: 511

Originally Posted by Nan_PA_6b View Post
So if covers make for lower than outside temps, does this mean things will get colder under a row cover? (Which is supposed to extend the season). And when it's going down to near freezing, does this mean we should not cover our plants to protect them, if they'll only get colder under cover than out in the open?

So far any evidence points to row covers helping.

Has anyone done a long term study on this effect?

Back in March of 16 I noticed the temp. issue as well. I said this:

This morning I noticed the temp. in the GH was 40. The outside temp was 45.
When I first heard about this, I wrongly assumed it had to do with wind being sealed out, and not bringing in warm temps. I recall leaving the end door open one night, walking in and the moment I crossed the "threshold" you could feel the temp. change.

After that, I started leaving the sides rolled up. Problem solved. Or, use backup heat.

Either way, a real solution would be nice.
FourOaks is offline   Reply With Quote