CO2 during last weeks

i think the issue causing the debate here is simple a misunderstanding. CO2 cause the plant to take longer to finish flowering by inhibiting the ethylene production. This does not effect the final THC content, however, if a plant that would normally finish at 8 weeks is harvested at 8 weeks and has not finished flowering yet then yes it will reduce potency, how if the plant is left until it is finished it will have the same potency with an increased yield, in some cases the yield will even be greater when harvested early than a non supplemented plant would be at the same time.

A possible way to overcome this extended flowering period is to introduce ethylene in the final 2 weeks along with the CO2 to induce "ripening". many ppl in the past have suggested placing a banana peel at the bottom of each plant or an over ripe apple and letting them begin to decay. while most people, at the time, considered this an "old wives tale" there is in fact science to support it. As most fruits ripen and decay they produce ethylene which in turn stimulates the other plants in the area to ripen also.

Or, you reduce co2 to ambient levels somewhere around 2 weeks prior to harvest. I see what you mean and agree with that, but I do not support leaving co2 on all the way through flowering.

"one rotten apple spoils the whole bunch"

Not so much the apple but it's ethylene farts.

Alex Kelly said:

Or, you reduce co2 to ambient levels somewhere around 2 weeks prior to harvest. I see what you mean and agree with that, but I do not support leaving co2 on all the way through flowering.

Click to expand...

i hear what your saying but i run it nonstop and harvest a plant or 2 every 5-7 days without any lack of potentcy.my 8 week strains take 8 weeks with or without the co2.

That's fine, but you are not utilizing the co2 the best way that you can. If you are constantly running co2 at the same level through your plant's cycle, then you can't get to maximum co2 levels (around 1500 give or take) because your younger plants can't take it. Like I said, I agree that co2 does not effect THC production, but you will not be reaching your maximum yields. There's nothing you can do though if you're growing plants of different maturity levels in the same room. i have never noticed a change in finishing time with co2, but I have never done any research on that so I cant add any input. I would assume that if there was a cange it would be very very small, like a day. Peace.