Do outdoor growers need to add co2 to plants

[Learningkanaka]

Just asking

[Jaysittinback]

No there is enough, up to certian elevations anyway. Probably at 20,000 feet it might benefit.

[Docnraq]

If you added co2 outside ot would just dissapate into the air. In order to use co2 propperly the room should be sealed.