Thanks for replying Dave....I think you may have hit the nail on the head with the soil being rich. It was brand new soil-promix- when I planted them, and they are on a regular feeding schedule....probably they are all set with nutes. I'm using 15-30-15 at 1/2 strength once a week during flower...and it's then, in the 6+ weeks of bud, that this condition shows. Tips and margins start to brown and dry out, some leaves are easily knocked off....It's only happening to the WW and the Sativa Spirit.
The WW was started from seed, got around 6 in tall then was cloned,sexed and went straight to the bud room. The others went back to veg. (I got 8 females) She's a nice plant. Untopped, on 12/11/09, she was 40 in tall, and the bud was 6 in wide. I have pics, but can't remember how to post 'em...supposed to go from my card to photobucket to this site somehow....
She is in her 7th week last Sunday(12/20) from the time I put her in the bud room. I'm not sure if I should start counting then, or count when I see they've flipped....
By the way, you guys are growing some splendid plants.