how fast would a 400w hsp grow plants

About this fast ..............:

Seriously though, if they are autos then the time it takes to flower is already set. They will veg much better under a MH.
 
Well I had a plant once that was growing slow and I started 5 threads about it and then it totally blew up!

Maybe the answer is...start a couple more threads ? Or add a CFL
 
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