CO2 in Veg Room or in Flowering Room?

If you had 2 large spaces, 1 for vegging and clone racks and another space for flowering. But only one of the spaces is well sealed and suitable for CO2.

Which would be best, CO2 for the Veg and Clones room, or CO2 for the flowering room?

Flower room

coreywebster said:

Flower room

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i can't remember who posted it but the advice was no co2 during stretch (2 wks 12/12) and last 2 weeks of bloom? is that accurate?

rkymtnman said:

i can't remember who posted it but the advice was no co2 during stretch (2 wks 12/12) and last 2 weeks of bloom? is that accurate?

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I've heard something along those lines too but where from I couldn't tell you

i use co2 in veg and flower i just keep it at 1500ppm the whole time wont hurt anything as when plants first evolved on earth the co2 concentration on the planet was around that level. yea i dont turn the co2 off during stretch thats a hassle moving a carbon filter and fan and opening dampers to change the room from a sealed room to an open room with negative pressure to save on a few pennies of natural gas. also i would not turn off the co2 during that last two weeks of flower thats when they put on the most weight should be hitting them with as much light as possible during that time