Co2 Veg ..

I was wondering if using co2 on my ladies while Veg state will make them happier .. or it is only efficient at Flowering state ?

I had the same question... guess I'll wait for the answer with you.

For small grows Co2 is not necessary...only for closed off rooms with LOTS of plants.

The Co2 intake from a plant is more benefical during veging then flowering.

since co2 is necessary for lots of plants....should i use co2 on a crop of 15? or is it fine without co2?

you have to check the PPM in the room first b4 making that decision, I am bringing in 250 PPM at the moment so I need to add this amount in my grow room of 2000 PPM to 3000 PPM.