HEAT!!! how hot is too HOT?

[hillbillyIBL]

What would you consider too hot?
What's your grow room temp?

 

[Goatstroker]

My room gets into the low 90's in summer, I don't worry about it at all for these reasons:

-I have great air flow and it still feels comfortable in there.

-Outside gets into the 90's and every living plant does not wither and die.

-I have noticed no ill effects.

If my room gets into the upper 90's I'll do something about it, but that hasn't been an issue here for me. Some folks will say you NEED to have your room dialed in to a 5 degree temp range and anything outside of that will result in catastrophe. I'm not one of those people.

So I guess for me, too hot is anything over about 95 or so.

My temps lately have been between upper 60's at night - mid 80's during the day, which I think is lovely.

 

[Lapides]

80 degrees and higher is too hot for me.

I cherish the terpenes I take 68-85+days to cultivate too much to let my rooms get any hotter.

 

[stihgnobevoli]

i wouldn't let it get over 90-92 at the top zone. they're gonna be real thirsty and tend to dry out faster from the heat coming off the bulb.

 

[evertking]

If you get uncomfortable being in there, than its uncomfortable for them. Fresh air.. Keep em watered.. My tent with a HID tops 90 than goes back down.. Depends in the day.

 

[nickman]

In the summertime even with my ac running it still gets up to like 82-83 about ten inches under the bulb... That's why I like growing during the wintertime a lot better... I don't even use my ac during the winter... Terpenes and crystal production is always better during winter grows...

 

[thatonedude]

if you can keep the rootzone cool and good air circulation/exchange plants can handle temps up to 100 for a few hours a day with no ill effects. don't let the roots get over 75 and make sure they don't dry out. these are not ideal conditions mind you. but this is how plants manage to handle high temps outdoors. cool soil

 

[FromHolland]

Keep the temp 25-28c. If its getting too hot your plants will tell you so, their leaves will start to curl up (taco effect).

 

[mack 10]

Add Co2. Will work wonders for a hot room.

 

[krunchbubble]

Add Co2. Will work wonders for a hot room.

Fuck YA!

 

[stoned-trout]

if ya hit 100+ it gets ugly..i don't like over 92 max, I preferr mid 80s max..

 

[Goatstroker]

if you can keep the rootzone cool and good air circulation/exchange plants can handle temps up to 100 for a few hours a day with no ill effects. don't let the roots get over 75 and make sure they don't dry out. these are not ideal conditions mind you. but this is how plants manage to handle high temps outdoors. cool soil

Yeah I should've mentioned, I grow in fabric pots on a cool cement floor. Takes up small spills great and also keeps my root area cool. These things do matter

 

[teemu shalanie]

I like to have Ac kick on by 85-86 , but with Co2 , It soo true, too hot add Co2 , I have seen plants get stressed from heat cause I ran outta gas, then come back with the gas,.

TS

 

[stihgnobevoli]

Keep the temp 25-28c. If its getting too hot your plants will tell you so, their leaves will start to curl up (taco effect).

actually taco leaves is from mag def. when they're too hot the angle of the leaves change to be more vertical than horizontal.

 

[Dave Coulier]

actually taco leaves is from mag def. when they're too hot the angle of the leaves change to be more vertical than horizontal.

I myself have never seen a Mg deficiency manifest by leaf taco'ing, but according to NCU, leaf margins may curl upwards or downwards with a leaf puckering effect. In this case, I dont believe it has anything to do with Mg. Your right about how the angle of leaves change when there is too much light rays striking them including infra-red. Although leaves on mj and many other plants will curl their leaves in an attempt to limit water loss, but It's not the only reason why leaf curling can occur.

 

[stoney917]

Havent read the replys but...If u gotta ask its prob to hot.... i like mid 70s with the available cooling to get into low60s.... etra cooling available never hurts.... a fan breaks instead of gettin fuct u can survive.... low 80s is ok co2 makes huge difference so does growstyle... if u run higher temps make sure u got good great airflow lots a fans..

 

[Benjamin Check]

I keep it at 77/50 with no co2. With co2, 92/65. If it gets over 85 in my room without co2 enrichment the edges of leaves wrinkle and curl trying to transpire. No good.

 

[FromHolland]

actually taco leaves is from mag def. when they're too hot the angle of the leaves change to be more vertical than horizontal.

With mg def the leaves will start to become a little bit lighter and curl up. With heatstress they will only curl up, and agreed they'll go horizontal. I used to call it erection problem. lol

 

[Mikell]

If you get uncomfortable being in there, than its uncomfortable for them.

That is a terrible rule of thumb, and one that's popping up lately. I prefer 7-8 glasses of water spaced throughout the day, maybe I should start watering that way....

 

[Gry]

Today is too damn hot. I looked and it only made down into the seventies for 2 hours last night. I would not be surprised if it did not get out of the 80s at all tonight. Only run the AC three days so far this summer, but that thing has been running nonstop for the past 3 days.