If you vent your room once a day you won't have ethylene gas buildups. As to the use of CO2 in later flower, I always reduce my CO2, temps and light intensity during the last few weeks. This makes for denser nugs and better yields. No foxtailing and no fluffy buds.
WHAT????
Ethylene gas IS what ripens the buds! You WANT that in the last 2 weeks!
If your having ethylene build up problems
while your gassing. Your burners are fucked up and should be Repaired/replaced. Poorly burning propane does create an ethylene "build up"...
Something I used to monitor closely in greenhouse's, in the winter months.
It has been proper procedure with all gassing. To
stop gassing for the last 2 weeks!
Have to say that in one crop I used same sativa clones...and one of them was directly under CO2 tubes from yeast fermentation...I should have put the CO2 better distributed cause that clone was about 10 days younger than the others at flowering time...I was mad about the reasons…(looking for light leaks etc...) never had that problema. with those clones..Then I read about CO2 ethylene inhibition….then I noticed..the tubes providing The CO2 were just over this clone that was always younger than the others… I dont know if I was using too much CO2 cause I dont have a CO2 measuring unit… I used the CO2 until end of crop, and the flowering delay was noticed from middle flowering…
Just my two cents
Read the above and understand
WHY your plants took longer!
ALWAYS stop gassing for your last 2 week "ripening period"
Keeping in mind that I run about 2 weeks longer then any breeder report (on average). Gas was run during the "bulking" period but
stopped for the last 2 weeks to
ripen the buds!!!
I stopped gassing in my newer building designs. It was just not worth the cost vs. the return.
