Back to Grow Questions

High heat in greenhouse, how hot is to hot?

Crpehdmstarted grow question 6y 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

Solved

Setup. Ventilation

likes

NobodysBudsanswered grow question 6y 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.

likes

Complain

Selected By The Grower

the_canna_scientistanswered grow question 6y ago

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

likes

Complain

GMSgrowsanswered grow question 6y 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

likes

Complain

Similar Grow Questions

Solved

Ventilation. For 2x2 help please, do i need a carbon filter set up? Please explain my best route.Im currently waiting for a 2x2 grow tent & light... ive read i dont need a carbon filter For one plant.... if i have a fan in tp simulate wind and strengthen my plant.... would i need a fan of new air coming in? Or just leave the fan by the hatch to suck new air in Help please!!

Other. General questions

Other. Other

Setup. Ventilation

6y ago

3

4

Solved

Fan vs Fanless LEDs How effective are heatsink LEDs? I'm not sure if I should go with fanless (like Mars Hydro SP150) or with a fan (Mars Pro II Epistar 120). I struggle with heat, when the tent is closed it gets to 29-30 degrees with humidifier in full swing (HID lights) and I want to close it soon

Setup. Lighting

Setup. Ventilation

6y ago

3

3

Solved

PortkeyCannabis

Humidity I’ve been seeing a lot of people have a much lower humidity. I’ve been keeping mine at 75-80 with around the same temps. Is that to high?

Setup. Ventilation

4y ago

1

1

Solved

GoodVibeSpreader

Light and Tent, Indoor Grow ?Hi people, One of my friend planned to grow indoor, he has the perfect room for it but since he's starting and we're growing cannabis on a budget I wonder what light and tent should we start with (for everything else i can help him since I already grown weed outdoor) Thanks !

Setup. Lighting

Setup. Ventilation

6y ago

1

1

Solved

NEGATIVE / POSITIVE pressure Hi fellow growers.. I wont pretend to be a Pro nor an Amateur. Just willing to learn and progress.. 🙏😌 First question I have is one I've struggled with finding an answer too.. ......NEGATIVE / POSITIVE Pressure..... Which should I have? Why!

Setup. Ventilation

6y ago

2

2

Solved

Lights airstone c02 What light to plant distance would you set it at? The only test I've done is at 25 inches its stable at 80°f and 75% humidity. When I lower it to 18 inches, the tent read 85°f and 73 humidity. Other question I have is what's your favorite air stone(disk)? Lastly, add c02 yes/no

Setup. Strain · Autoflowering

Setup. Lighting

Setup. Ventilation

5y ago

2

2

Solved

BooBoosHotBoxCornGrow

Temp tent issue Nice! Thanks guys for the quick help! I’m also kinda sort of having a temp issue, I’m trying to make it the best I can, I’m way down south and the temp reads 86-88 a lot. If I blast the fans and humidifier it does get down but I’m worried about the electric bill going up.

Setup. Ventilation

6y ago

3

3

Solved

hi guys hey, guys, sorry to bother you, but for a grow 40x40x120, this suction will work?https://www.amazon.it/dp/B07CYRF958/ref=cm_sw_r_wa_apa_i_p.cUEb7SZTBHC

Setup. Ventilation

6y ago

4

Solved

Ventilación y Luz en plantulas I was inspired by McGyver and set up an improvised cabinet... How important is ventilation at this seedling stage?🌬️ (I left the door slightly open just in case)🤔 I also added another auxiliary light... will it make a difference in growth or is it a waste of light?🔌🔋

Setup. Lighting

Setup. Ventilation

Setup. Seedling

5y ago

3

2

Solved

Co2,Hey growers! I'm having a hard time keeping the heat down in my room with outside temperature above 20*c, my room will reach 30*c. Just looking for good recommendations for a good setup and automated system.i am using a A/C unit atm.

Setup. Ventilation

6y ago

4

Solved

Retailer saying I need a bigger fan 1st post here going to be starting a diary soon, went to buy a complete set up today 240x120x200 tent 2x600w light kits 6" fan rhyno hobby 6" filter & all the rest, but retailer now saying fan & filter in that package won't be sufficient & I need to upgrade to a 8"fan n filter?

Setup. Ventilation

6y ago

1

5

Solved

Belüftung Hey Ho, so far I've been using my 2 small fans at the entrance and the exhaust in the middle. Since there's no air reaching the back and the circulation takes quite a while (smoke lingers for about 1 minute until it's ventilated), I wanted to ask which fan I should install there?

Setup. Ventilation

5y ago

1

Solved

Clip fan question Should i turn on the clip fans on low power and let them blow on the girls, or just leave the big fan blowing under the light?

Setup. Ventilation

5y ago

2

2

Solved

Humedad dentro del cultivo The humidity is reaching 80% and even 90% in my grow, I've bought a humidity reducer that they sell at the supermarket, one of those that reduces humidity and has some stones inside. Will this harm the plants??

Other. General questions

Other. Other

Setup. Ventilation

4y ago

1

2

Solved

Autos week 3 veg but only 4 nodes – could humidity swings be the cause?In a 60×60 cm grow box I’m using a single-membrane mist maker with an STC-3028 humidity controller. Even with the exhaust fan at the lowest speed, RH swings every 2–3 min (67%→63% in ~90s, then back in ~90s). Is this fluctuation OK? My plant has only 4 nodes in week 3 of veg.

Leaves. Too few

Setup. Ventilation

6mo ago

2

1

Solved

Newbiegrower420

Humidistat levels vary wildly between Inkbird and ETI humidistats..I have two humidistats, one is an Inkbird 200 for control, the other is ETI 810-195 just for display.. The ETI is showing roughly 9-10% higher humidity levels compared to the Inkbird. Does anyone know which is more accurate? I want it get these humidity levels just right 👌🏼

Setup. Ventilation

6y ago

2

3

Solved

Yay, I ordered a growlight + tent + accessories! I'm planning to install all of this in my basement. I have a small window that I could use to send the filtered exhaust air to. but will it suffice to just get intake air from the basement itself? Or would I need an air purifier?

Setup. Ventilation

5y ago

5

5

Solved

How to keep spacebucket cool Even when lights are off, bucket temperatures can reach upto 40*C rarely seeming to dip below 30, icepacks help lower temp and raise humidity for a bit, i worry the 2 passive intakes i have arent large enough, although the room itself is very warm too, air con only option?

Setup. Ventilation

6y ago

2

2

Solved

Debutant_dream23

Extracteur et intracteur Hey, I’d like to go with the cloudline range from Ac Infinity! My setup: 4×4 tent! 120×120×200! LED: 800w! What type of exhaust and intake air extraction do you recommend? I’ve looked into the different calculations but to no avail, enlighten me 🙏🏽🙏🏽

Setup. Ventilation

6y ago

2

2

Solved

Controlling environment in closet with no intake fan?I'm growing inside my closet, and I'm having trouble controlling temp/humidity. I have an AC Infinity exhaust fan and a cheap amazon fan + wet towel blowing air in from the outside. Are there any cost-effective ways for me to control this? It can get a little warm/dry sometimes

Other. General questions

Setup. Ventilation

5y ago

2

2