I think you fried them, 3.5 weeks old probably only need small amounts of fertilizer. Too much pearlite will cause your soil to not retain as much water either.
Purple Daddy Reviewed by Purple Daddy on . Who can help diagnose my issue? Situation basics: Plants are 3.5 weeks old (in veg), bubble gum strain. The room tends to stay in the low 80s and into the high 70s at night. Humidity is typically around 50% Under a 400W MH 24/0 in soil which is local hydro shops "pro mix" plus about 33% (by volume) perlite. Plants are given a half gallon of water twice a week. 1 time is the botanicare directions found here -> with ph'd and the other is ph'd water with 10ml cal-mag per gallon. Rating: 5