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 fertilise I always end up buring them and everything gets worse.. (1-2spatulas per 5 litres)

I'm growing under 400W MH, but soon to have a 400W HPS alongside aswell.

any advice on diagnosing my inherent problem, and fertilising tips - most appreciated.
derstig Reviewed by derstig 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