lights off, temps @ 90F, will this be ok?

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bam bam

Active Member
During my dark cycle, with lights off if temps in my cabinet reaches 90F will this be ok?

I figure if plant stoma closes during dark cylcle it should be ok if temp get to 90f?

I have a lot of ventilation so hot stagnant air doesnt sit in the cabinet.

During day time it gets really hot so I turn the lights off during the day time.
 
B

bam bam

Active Member
GreatwhiteNorth said:
What kind of lighting are you using & how hot does it get when lights are on?
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When lights are on I run AC to keep temps below 80F. Iam using CFLs 6x42 watts. Its really hot in my area in the summer my room temperature reaches 90F during the day. Even at night without AC on the temperature in my room is about 85F during the summer months.
 
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chitownsmoking

Guest
90 degrese in the dark? how hot is it with lights on? you ideally want to keep it at like 72 f.
 
B

bam bam

Active Member
chitownsmoking said:
90 degrese in the dark? how hot is it with lights on? you ideally want to keep it at like 72 f.
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When lights are on I run AC to keep temps below 80F usually around 75F.

When lights are off I dont run AC so my temps get close to 90F because my room temperature during summer is around 90F.
 
GreatwhiteNorth

GreatwhiteNorth

Global Moderator
Staff member
Well, that sounds like you are on the high side of the scale, but if they don't get much higher than that then I'd be inclined to say they should be fine as far as temps go.
Peace.
 
Punk

Punk

Well-Known Member
This is a unique problem. It may cause your plants to hermmie, could cause odd bud growth. Might not do anything at all. IF you can't control the temp, at least try to control the humidity.

You want the temps to be lower when the lights are off, especially during flowering. Just like in nature, when you get towards the end of the season, the nights don't usually hold the heat, so it's a normal occurance to have lower temps at night.

Keep in mind, you're playing role of god when you grow plants inside, so you have Intensity of the light, the duration of the light, but also in that mix is tempurature. Chitownsmoking is right, indoors, you're going to want those temps down into the low 70s.
 
B

bam bam

Active Member
Punk said:
This is a unique problem. It may cause your plants to hermmie, could cause odd bud growth. Might not do anything at all. IF you can't control the temp, at least try to control the humidity.

You want the temps to be lower when the lights are off, especially during flowering. Just like in nature, when you get towards the end of the season, the nights don't usually hold the heat, so it's a normal occurance to have lower temps at night.

Keep in mind, you're playing role of god when you grow plants inside, so you have Intensity of the light, the duration of the light, but also in that mix is tempurature. Chitownsmoking is right, indoors, you're going to want those temps down into the low 70s.
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I just dont want to run my AC for too long.
 
GreatwhiteNorth

GreatwhiteNorth

Global Moderator
Staff member
angelsbandit said:
Just curious - how do folks come up with the "perfect temperatures" being quoted here?
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Difference in day and night temperatures
Difference in day and night temperatures

Most vigorous plants do well in 75F-85F for light hours and 65F during dark periods.
The difference in day and night temperatures has been coined "DIF". If the DIF is opposite (cooler days warmer nights) some studies have shown plants with closer internodal spacing.
This might help increase results in some varieties of plants. It may have to do with the activation of certain hormones and enzymes in the plants at certain temperatures. Get a high-low type thermometer and record daily temperatures and see which give you the best results.
A breeder should know their plants. They likely know "the little things" about the plant, understanding those special needs and attributions can produce the optimum yields. Seed breeders must also promote their product, so also be aware of exaggerated claims. Remember the strain has to work for you and the types of conditions that you are able to provide. Experiment with different temperatures, planting densities (this would include time in the veg cycle), levels of nutrients, planting mediums, etc. Only this way can you find these preferences on your own.
 
tech209

tech209

Well-Known Member
seems like everywhere ,everyone is taking on heat issues.....starting to grow a.m.s in my garage with nothing fancy than just soil and a fan and some cfl's to keep cost down during this recession....temps are 91-98 so far so good.....just make sure you give em plenty of water and they'll be fine....dont give in to all the hype bout "oh temps suppose to this and that" dude its a weed....it grows anywhere/everywhere it wants ....:joint:

-not trying to rag on anyone cause if the money was right and everything was cool then why not get an a.c but all im sayin is i for one not going to kill myself trying to lower temps
 
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angelsbandit

Well-Known Member
I am just curious - take Jamiaca for instance:

Daytime temperatures are above 80 all year round, and above 90 in the summer months.
Night temperatures never go below mid 70s and summer temperatures don't drop below hight 70s / low 80s.

Yet everyone seems to say that problems will arise from these temperatures - seems strange to me.
 
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chitownsmoking

Guest
90 degreese is fucking hot. but your shit will still grow. shit some pure sativas might even thrive in that. i had a similer problem with my last indoor harvest was waay too hot in the 90's twords the end of bloom. and thats the reason i belave my buds werent has dense has they were geneticly bred to be
 
tech209

tech209

Well-Known Member
chitownsmoking said:
90 degreese is fucking hot. but your shit will still grow. shit some pure sativas might even thrive in that. i had a similer problem with my last indoor harvest was waay too hot in the 90's twords the end of bloom. and thats the reason i belave my buds werent has dense has they were geneticly bred to be
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you got a point right there....STRAIN....... it plays a key role on how much it can handle, outdoor strains can take this abuse (summer heat)but for indoor strains at these temps....its a toss up.....a/m/s is more of a sativa from what ive read
 
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