Have you ever done a soil pH test on your mix? I'm wondering if you may be too acidic. As for burning your plants with too-heavy fert, what are you using for a vegetative growth fert? As a starting adjustment, I'd suggest fert at half your usual strength.

Also are you puttings seedlings under your HID lamps? They might not be liking it. Are you seeing negative phototropism (leaves turning away from the light)? Also what are your temps? Seedlings can be really fragile under HIDS. You might try putting them under floro until they get established, then put them under HID. I'm mentioning this because you mentioned growth slowing down...It could just be nutes, but it could be alot of other things as well. Good luck.


Dboy
dboy Reviewed by dboy on . Adding fert to soil mixture Hi, Ive got some Bahia Blackhead (KC Brains) germinating, and I'm using 50/50 compost and sharp sand mix as a potting medium (drains really well). I always seem to get some defficiencies after 1-3 weeks of growth, starting with the bottom leaves going pale and then brown and crispy, and then the tips of the upper leaves go brown and crispy too and growth slows down alot. Is it worth mixing some small amount of ChemPak no.2 (npk 25:15:15) into my soil mixture, as when I try and liquid Rating: 5