How Much Longer Should I Veg?

Okay so I have a Shiskaberry and Chemdog both from clones. Since I have limited plants at the moment I wanted to know how much longer should I veg these? I want a large yeild, I'm willing to wait. I have a 4'x4'x6'5 grow tent with a 400w MH/HPS and have another one coming soon. So when do you think I should start flowering to get a large yeild?

Add c02 it will give your yield a boost...

I was planing on buying the temporary co2 packets until I can afford a tank with regulator, but any ides on when to flower?

looks like you revegged on that last pic

I can give you my reccomendations. 5 gallon pots. When do you get your HPS, and what lighting/times are you using now? Read up on FIM method pruning, and supercropping. After reading that, do it and veg for another week or two. Remember, you are trying to get as much root growth as possible during veg!

since you have 6.5 ft , i would say veg them until they are at least 2.5 or 3 ft tall
and then flower them, cause they double in size when in flower

keep em green

Base it on your grow area, keeping in mind the plant will double or triple in size during flowering.

You mean the one in the background? It was a friend of mine that harvested the plant and kept it alive so I decided just to take it, but I dont think I should re-flower her because doesn't stress them out to much? I will probably end up keeping her as a mother plant.

Oh, and for CO2, i use sugar, live yeast, and water. Its a cheap and effective method. Whenever you open up your room, just give the bottle a shake before you close up. Just make sure its above your plants, co2 is heavier than air, so it falls.

Around 18" tall would be good.. and during the vegitative stage i would use a 6500 florescent lights for growth

Im running a 20/4 light cycle right now about to drop to 18/6.

And Tree thanks for that info! I go and try it tomorrow!

go a month or 2, at leats 20 inches i guesa when it starts getting lateral stems