Greenhouse growing temps

[dmacch]

I grow catts and phals in my GH. I have the day temps set at 75 deg and nights at 64 deg. My question has to do with day temps and cloudy days. Should I just have a minimum temp set on the thermostat only and let the sun warm the GH or do I leave the setup the way it is so the phals arent chilled on a cloudy day. The problem with letting the sun do the work of heating the GH is that a couple of hours after the sun starts to heat the GH it gets blocked, for about twenty min by a nieghbors tree, then hits the Gh again. So my main concern is keeping temps constant. Any thoughts on this subject. Thanks

[BikerDoc5968]

Don't know where "home" is and it really doesn't make much difference....just my curiosity. My GH temps fluctuate all the time and I don't see much of a problem. I try to keep an average day of about 70 and nites about 58 to 64....all depends how much energy I have at the end of the day to go out and adjust the thermostat. I'm growing catts, phals, paphs, phrgs, cymb, and a small number of oncidium alliance stuff.

[Brooke]

I keep my thermostat at 60 which means the temps go from 60-62. It never gets adjusted even when the days, and days, and days of low gray clouds hang on all day.

If the sun is out, the temps go higher but I don't readjust the heat when the sun is MIA.

I grow many catts and phals plus lots of other things. The plants do great.

Brooke

[mojomick]

I grow catts, phals,phrags, and a lot of misc. orchids in the gh. I keep the low temp set at 58 which means it goes from 58 to 62. I don't control the daytime temps but let the sun heat it up if it is out. I do watch for the temps to get above 85 though and at that point start looking at a little ventilation. That usually doesn't happen until March at which point I put on the shade cloth. I was maintaining the night temps between 54 and 58 and began to have bug problems so raised the temp. My plants seem to be doing well. I have lots of spikes and new growth beginning. Betty