I don't know from experience... but it took me all of 30 seconds to find this :thumbsup:

Quote Originally Posted by stinkyattic
BTW if you top, you MUST wait 3 weeks before flowering.
Normally I wouldn't just quote random posts... but she knows what's up. With her experience I think she could plant a beet seed and grow it into some chronic. :jointsmile:

I don't think the preflowers matter completely. Although any cutting will stress the plant, so doing it right matters. :hippy:
As for the different growth rates of the plants... are they assorted bag seeds? Various known strains you purchased?
You gotta throw us a bone here... to help, people need to know the facts. :jointsmile: