Temperatures

Hey guys I have my tent temp set to 22°c for when the light is on my issue here is temperature when the lights go out l, can I keep it at 22°c or does it have to drop?

You can keep it steady. Won't hurt anything.

3rd Monkey said:

You can keep it steady. Won't hurt anything.

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Sound, thanks mate, as my heater I got to manually set the temp and the lights go out at 3am

you can keep it the same but if it does drop i believe you don't want the range to be too drastic. i forgot why maybe it causes shock?

Lethidox said:

i forgot why maybe it causes shock?

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I believe if the temps drop too much, you'll have problems associated with high humidity.

Timezone said:

I believe if the temps drop too much, you'll have problems associated with high humidity.

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yea humidity but i think it has to deal with shock as well kinda of like hardening basically. shock can fuck your plants up big time

22 is a fine temperature. I usually am at 25c during the day and 21c at night. I run a MH 400 watt and only run the extractor fan at lights on.

If im not mistaken you should be fine as long as your temps dont go near or below 15C.

The ideal range is 18C - 30C with a temperature swing between your high and low of less than 10 degrees the greater the temperature swing the greater the humidity swing as well.

JJSG said:

Hey guys I have my tent temp set to 22°c for when the light is on my issue here is temperature when the lights go out l, can I keep it at 22°c or does it have to drop?

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From what I've read, you'll probably see slower growth with no temperature swings. Positive differentiation (cooler nights) causes stretching of the stem. Negative differentiation (nights warmer than day) will bring plant growth to a halt

It would better if you could atleast drop it a few degrees at night. 22 Celsius during the day is fine.

JJSG said:

Hey guys I have my tent temp set to 22°c for when the light is on my issue here is temperature when the lights go out l, can I keep it at 22°c or does it have to drop?

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Man I'd raise that during lights on. Kudos to you for keeping it that cool lights on. I'd say 25 on 22 off. Titan Controls has a good controller called the Zephyr 1 that will control temp for you with an ac

Skoal said:

22 is a fine temperature. I usually am at 25c during the day and 21c at night. I run a MH 400 watt and only run the extractor fan at lights on.

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This right here is perfect

I keep it at 26 lights on and don’t like more than a 3-4 degree change at lights off.

T macc said:

From what I've read, you'll probably see slower growth with no temperature swings. Positive differentiation (cooler nights) causes stretching of the stem. Negative differentiation (nights warmer than day) will bring plant growth to a halt

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That means getting up at 3am to turn the temps down think I could drop it around 12ish? 3 hours before lights go out ?

JJSG said:

That means getting up at 3am to turn the temps down think I could drop it around 12ish? 3 hours before lights go out ?

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That'd be fine. What are your night temps?

They say max of 10 degree variation f between day and night, mine drops about 6 - 8 degrees f at night

JJSG said:

That means getting up at 3am to turn the temps down think I could drop it around 12ish? 3 hours before lights go out ?

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You can always change your light schedule to better match your availability.

Lethidox said:

you can keep it the same but if it does drop i believe you don't want the range to be too drastic. i forgot why maybe it causes shock?

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That's correct, You want to avoid a temperature swing greater than 10C, however at the same time you want a slight change in temperature to help plant growth. Plants like to be slightly warmer while absorbing energy and slightly cooler when respiring. So a swing of 2-3 degrees between day and night in most plants will help growth. Its a very minute difference, but 1% a day over the course of 40 days (just throwing out random numbers for thought I cannot provide evidence with accurate numbers because I haven't read too deep into the subject). More of one of those extra steps you take if you can, but wont really harm you if you don't. I have read though that cannabis like to be slightly warmer, around 24 - 26C during daytime. but if you get closer to 27,28 you can start heat stressing.

Actuosity said:

That's correct, You want to avoid a temperature swing greater than 10C, however at the same time you want a slight change in temperature to help plant growth. Plants like to be slightly warmer while absorbing energy and slightly cooler when respiring. So a swing of 2-3 degrees between day and night in most plants will help growth. Its a very minute difference, but 1% a day over the course of 40 days (just throwing out random numbers for thought I cannot provide evidence with accurate numbers because I haven't read too deep into the subject). More of one of those extra steps you take if you can, but wont really harm you if you don't. I have read though that cannabis like to be slightly warmer, around 24 - 26C during daytime. but if you get closer to 27,28 you can start heat stressing.

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Do you mean 10° Fahrenheit?

Beachwalker said:

Do you mean 10° Fahrenheit?

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No 10 degree C, I think thats approximately 15 Degrees F.