Lower Co2 ppm & lower temps. ???
- Thread starter Remi1
- Start date
SharpEdges
New Member
I don't think there is a correlation, pot can tolerate higher temps at higher co2 levels, but lower temps don't require lower co2 levels.
You want to raise your co2 ppm level as the plants grow and flower. 1250 ppm is pretty low for max ppm in flower. You should be more between 1500-1800ppm at peak. Some think 1800 is high but I've been using that as a max for around 10 years now with great results.
Yes, the plants will metabolize higher levels of co2 more effectively with warmer temps in the 82-85 range. The cooler you go the less ability the plant to metabolize at it's highest potential.
Keep in mind though that ambient temp is different from plant canopy level temp. The temp at the plant canopy level under the lights will always be warmer by 5-8 degrees approx than your ambient air temp if you have good cooling and air circulation in the room.
Yes, the plants will metabolize higher levels of co2 more effectively with warmer temps in the 82-85 range. The cooler you go the less ability the plant to metabolize at it's highest potential.
Keep in mind though that ambient temp is different from plant canopy level temp. The temp at the plant canopy level under the lights will always be warmer by 5-8 degrees approx than your ambient air temp if you have good cooling and air circulation in the room.
Remi1
Member
Ok so im gonna use these numbers just for an example.
at 83 degrees the plant transpires enough to use 1250 ppm of co2 at max efficiency.
then as you lower the temps i'm assuming the ppm co2 that the plant uses will lower also because it's transpiring less......?
Whith that in mind.... what would be the ideal ppm that the plant will use at 75 degrees?
at 83 degrees the plant transpires enough to use 1250 ppm of co2 at max efficiency.
then as you lower the temps i'm assuming the ppm co2 that the plant uses will lower also because it's transpiring less......?
Whith that in mind.... what would be the ideal ppm that the plant will use at 75 degrees?
They will only use what they need. It's just their growth will differ with how efficiently they metabolize it.
At 83 you should be higher like 1500-1800 like I mentioned in my previous post.
Just set it for that and the plants will use what they want. If you have a regulator you will see what they are using and how often it is turning on and off. Are you growing in a sealed room or air exchange?
At 83 you should be higher like 1500-1800 like I mentioned in my previous post.
Just set it for that and the plants will use what they want. If you have a regulator you will see what they are using and how often it is turning on and off. Are you growing in a sealed room or air exchange?
budleydoright
Well-Known Member
I have run 800-1000 at lower temps but like yoda said, they will only use what they need. If there's more than they need no worries as it isn't toxic at those levels.