co2 ??

When should I be using it ??

Week 3 in veg is it too early?

What

I think it's better spent on flower

C02 was/ is used by large confined growers in order to exceed the standard 25c/77f temperature limits of growing weed

in most cases the cost of the setup and the running is too expensive for the average grower

I did try it in the day, and

as above to costly and too much sheer hassle .. for the effort

good luck