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Grow QuestionsHigh heat in greenhouse, how hot is to hot?

High heat in greenhouse, how hot is to hot?

Crpehdmstarted grow question 4 years ago

I built a 16x20 greenhouse with dual vents and a 24” exhaust fan. I hit a max of 122 (it’s 92 outside). I typically reach 105-110 on regular days. Everyone looks happy other than an nutrient burn issue. Can weed plants handle this kinda heat?

Crpehdm

Crpehdm

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Setup. Ventilation

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NobodysBudsanswered grow question 4 years ago

If you add CO2 it helps, but i don't think any amount ameliorates 122F or even 110F. There are charts to consult for that. Do what you can.. probably quite limited. You put in the effort so far, stick with it.

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the_canna_scientistanswered grow question 4 years ago

Evaporative coolers can work wonders on a greenhouse for really hot days.

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GMSgrowsanswered grow question 4 years ago

Not great for them but their outdoors where there is plenty of c02 and light so they can handle a lot of heat. Cheers

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