joe macclennan
Well-Known Member
well now that makes sense really. and kind of reinforces my earlier opinion on it being beneficial when vegging trees. I mean if the plant is that big it's roots are large enough for the space most likely.Co2 stops root growth if you don't know that already so if your using high levels of co2 in veg it's unnecessary. 600-700 ppm is ok for veg below 250 will stop plant growth. Reason why they bump it so high in flower is you figure you don't want your plants root to stretch causing root bound in flowering which isn't good so stunting root growth making for constant root generation makes for constant flower growth cause its soil is never bound. Hope that makes sense. My plants never loved high levels in veg roots were always tiny, you have to do it by periods. First 2 weeks of flower 1000 ppm to help with stretch, week 3-7 1500 ppm of co2 to pack weight and last 2 weeks you'd drop it to 800-900 to build higher thc levels and to finish properly
I don't use it in veg.