High heat yield question

Bugeye

Bugeye

Well-Known Member
This is a theoretical question, but the basis for it is my understanding that mj shuts down photosynthesis above 90 degrees and basically goes into survival mode. I'm trying to figure out what improving my greenhouse cooling could do to yield so I can know when to plant so I don't overgrow my space.

I'm estimating that I may be above 90 degrees for 25% of the daylight hours between June and mid-September. If I could get this down to 5%, is it reasonable to expect a 20% improvement in yield all else equal?

Obviously I will have less watering needs with cooler temps, but growing organically with AACT so not sure it matters. Any thoughts appreciated.
 
same. I see people growing in 90f. as long as the sun is very bright on those days. the plants may take an advantage to it and get bigger yield. as long as your under 95. no added co2. then your ok , put it this was no added co2. from 80 to 90 same yield. your buds may be more loose air e . if the plants are in late flower into heat. see I always have the temp in the 85 to 90 indoors. with 2000ppm c02. yes its over 1500 ppm. rec amount. 2000 adds way more yield , any ways if your spend big bucks on ac units for 5 degrees your wasteing your money. as long as you have good water supply. and ventilation fresh air and some wind moveing around in that green house the plants will love it .
 
No AC thoughts. Now have the water supply to add a misting fan which the sellers claim can take 15 degrees off my highs. Maybe I don't do that well but the ones I've seen make a pretty noticeable difference.
 
Don't some varieties come from regions with temperatures that well exceed 90f?

But even so, those types of strains probably wouldn't finish in our climate.

Just dabbed, thinking out loud
 
My outdoor temps soar above triple digits for weeks at a time. They seem to love it, as long as watering is closely monitored. My buddy has a swamp cooler on his hoop house.
 
Garden Boss said:
My outdoor temps soar above triple digits for weeks at a time. They seem to love it, as long as watering is closely monitored. My buddy has a swamp cooler on his hoop house.
Click to expand...

I keep my plants very healthy through my high temps with increased waterings in large quantities of dirt and lots of air movement and exchange. I notice a slowdown in growth though, not yours? Did your buddy get increased growth by adding his swamp cooler?

Thanks for the responses, sorry for any confusion on the health of my plants, they never even wilt and I see highs of 115F. Just slower growth.
 
He runs his without water so i guess i should have called it an over sized squirrel cage fan lol. He keeps it going during light deprivation also.
 
You must log in or register to reply here.
Back
Top