What is the most likely cause of this leaf discoloration on the edges? (PICS!)

Thats classic burn, but not something that's going to ruin you. Flush out real good and lower or eliminate the nutes for a short time until you see new growth coming in ok.

I got a couple of plants in my 12/12 tent that got seriously burned, old leaves still look like crap but the buds are bursting.
 
Back
Top