A question of a fellow grower:
I’ve started a hydro set up with 2 plants and a 600w hsp lamp. I’ve only had the plants for 2 weeks and because I started them off so late in the season I’ve left them in light for 24 hours a day l. Is this going to stunt them? They are growing ridiculously fast
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No, they’ll be fine. For the first couple weeks of my plants life, I leave them in 24 hours of light
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You can do any plant at 24 . You’ll get rapid growth. I do 24 for 30 days vegetation and the 12/12 for flowering!
I agree, shouldn’t be too big of an issue. You can reduce them to like 18 hours of light until ready to flower and save some on your electric bill.
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Awesome! Thanks guys. I didnt read anything in the GROW BIBLE that said anything like that but me old boy was telling me ladt night its no good. Thanks everyone 
Some Auto growers will do 24 hr until the last. And, some regular growers will do 24 hrs till flower.
I think every plant needs the rest and regeneration that darkness brings…sleep.