What temperature for grow tent LEDs

Nugnewbie

Nugnewbie

Well-Known Member

The Downlow On Vapor Pressure Density — How Does VPD Affect Cannabis Plants?

Vapor pressure deficit (VPD) isn't a term you'll find in the first few chapters of a cannabis growing guide. Heck, there are plenty of experienced cultivators who don't fully understand the intricacies of VPD. Although monitoring VPD is an advanced growing technique, there are benefits to...
www.rollitup.org

Here's a thread that seems to explain VPD quite well.
 
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Kola_Kreator

Well-Known Member
It's great if you have the control to be able to hit the vpd range. But if you want something simple just aim for 27 degrees C all the time. And drop the humidity through each stage. 70 for seedling or 75-90 for clone then 70 when rooted, 55-60 for veg, 50 for early flower, 45 for late flower. If you learn how to run something close to this you will get good results.
 
DanKiller

DanKiller

Well-Known Member
pegboy said:
I would say find what works best/easiest for your set up. Seedling, veg, and flower will all be slightly different. The pulse website has great charts to reference. As a general rule though I would say 72 to 82F and 45 to 60% RH for veg and for flower. Anywhere in that zone would be running pretty close to optimum.

EDIT: This is just my opinion. Your mileage may vary
Click to expand...
Its far from optimum, but it's good and troubleless range to be in no doubt.
 
Reekwind

Reekwind

Member
Canopy: 25-28
Root zone +18

Most of us measure at a single point in our rooms/tents which is hardly a scientific approach but a good indicator, and temps can easily differ 5 degrees C from canopy to root zone.

When switching from HPS to LED you also change the way your lights put out heat.
HPS has a lot more irradiation heat than LED where most of the heat dissipates upwards through the heatsinks.
So, your leaf surface temperature and root zone temperature are affected by the change and you may have to adjust other grow parameters accordingly (:
 
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