Temperature fluctuations!what’s acceptable ?

I am adding another light to my room and I’m looking at aircon is thier anything you need to be aware of and what types are bad I’m already on the high side of temperature and I have a graph of my fluctuations can I please have some advice
 

.Smoke

Well-Known Member
I'm not really seeing an issue if you're using led. Your leaf temps are most likely a couple degrees less than air temp which at your high point puts you around 85F which is great, and lows @ 69F which isn't bad.
That's pretty much how I run my room and it doesn't seem to cause any issues so long as you keep humidity in check.
 

weedstoner420

Well-Known Member
That really big humidity spike would be more of a concern for me. Did you spray water on the probe or something?
 
I'm not really seeing an issue if you're using led. Your leaf temps are most likely a couple degrees less than air temp which at your high point puts you around 85F which is great, and lows @ 69F which isn't bad.
That's pretty much how I run my room and it doesn't seem to cause any issues so long as you keep humidity in check.
Thanks mate I think the led will raise the temperature by two degrees atleast and I’m about to flower and I’ve read that it likes to be a couple of degrees cooler for flower and I’m in the middle of a dry Australian summer and this is my first grow so like John snow I know nothing
 

Bud man 43

Well-Known Member
It is best to avoid large variations in temperature. Stay within 10 degrees or so daytime to nighttime. This helps avoid humidity spikes also.
 

calvin.m16

Well-Known Member
Optimal Temperature & Humidity Growing


StageTemperatureHumidity
Seedling69.8 – 77ºF65-70%
Vegetative62.4 – 82.4°F40-70%
Early Flowering68 – 78.8°F40-50%
Late Flowering64.4 – 75.2°F30-40%
Storage (Curing Stage)64.9 – 69.9ªF60-65%
 

Thai Fox

Well-Known Member
My tent runs around 85 degrees during lights on and 65 at lights off.

My outdoor plants experience 30 to 40 degree day to night differences.

@bk78 15.55c - 32.22c difference in temp for the illiterate of the world ;)
Illiterate that's also smart enough to use a metric system unlike one of the last countries on earth still using an imperial system
 

1212ham

Well-Known Member
Optimal Temperature & Humidity Growing


StageTemperatureHumidity
Seedling69.8 – 77ºF65-70%
Vegetative62.4 – 82.4°F40-70%
Early Flowering68 – 78.8°F40-50%
Late Flowering64.4 – 75.2°F30-40%
Storage (Curing Stage)64.9 – 69.9ªF60-65%
What is the source of the chart?
 

kwigybo88

Well-Known Member
25c (78f) ambient temps in early flower under LED is definitely too cold imo. And veg should be up around 85.

You cant really use the same metrics for led as you do for hps. This is well documented.
 

Dameon187

Well-Known Member
Illiterate that's also smart enough to use a metric system unlike one of the last countries on earth still using an imperial system
And in my region we go from starting seeds at around 14 C, germinating just fine. Proceeding into the summer we had about 30 at a high and some nights are 16 through the summer. Heading into flower this time of year I've been seeing 16 during day and nights at 4 the worst yet, my date for doesn't look like it's changed. Lota of humidity. As fog and dew is heavy. Cant say this is not without its issues.. but this looks like good gear.. solid buds. insane OG or xxx crazy whatever you want to call it.. look like insane OG to me..
 

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calvin.m16

Well-Known Member
25c (78f) ambient temps in early flower under LED is definitely too cold imo. And veg should be up around 85.

You cant really use the same metrics for led as you do for hps. This is well documented.
I like cooler temps and lower humidity versus high temps high humidity. To each their own though, I just did a test run with high temps high humidity 85 °F : 60% RH and some of my larger colas produced botrytis (bud rot) even with adequate airflow.

When you run hotter temps you need higher humidity for proper transpiration (vpd).

To each their own, just sharing what works and has worked for me for 5 years.
 
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