Fert burn or K deficiency?

[Rusty Trichome]

The only two things that I did was:
1- Stopped using mineral water (changed to tap with 48h rest)
2- Start balancing the solutions to PH 6.0, instead of 6.5/7.0 like before.

So do you still feed with every watering? How much and how often?
Ditching the mineral water is a good idea. Too many minerals and metals. Did you know some contain uranium...?

One thing about my soil mix that I think you guys maybe missed is that I'm using 50% of perlite with it. Doesn't this make it work more like hydro?

Why, are you watering them like they're hydro?
No, I didn't miss the perlite. And nope, it's not anything like hydro. And I suggest you keep your ph in recommended range, or you will risk nutrient lockout. How are you testing your ingoing water and solutions?
How are you testing runoff ph?

Rusty Trichome Reviewed by Rusty Trichome on 05-24-2010. Fert burn or K deficiency? Hello growers! :) This is my first post here in this great forum. I've been reading a lot and started my first grow, and until now I had no problems. Last week two of my plants started to develop burn tips on some of my lower leaves. It quickly spread to most of the leaves, some with more intensity and others with less. I read a lot and saw loads of pictures of problems and deficiencies, but could not deicide if this is a Nute Burn or some kind of deficiency (Potassium?). It's hard Rating: 5