Probably because you've been feeding them and they're burned. They don't need it yet.

You flush the plant by watering twice/three time the volume of the pot with ph balanced water.

Like LIP said and I told you in the other post, this is basic, basic stuff and is readily available. Read my entire grow log so far, I'm a month ahead of you and I'm going ok so far. You can see what I've been doing, a lot of the basic topics are covered in that thread too. Good luck.
Zoidberg Reviewed by Zoidberg on . please help a first time grower im on week one of my first grow i went for the nft system but found out once i bought it that it didnt fit in my cubbord so there is mistake one. i started my seeds off in jiffy pellets and once they came through i gave them some light im useing a 500 watt sodium light with reflector so any because i cant use my nft system at this time i opted for the natural way in soil so i went out and bought some mirical grow soil and transfered my seedlings into 5 4 inch pots sadley after two days 3 of Rating: 5