brown edges

  1. G

    My plant is sick - Any ideas on how to diagnose it?

    Newer growth yellow Older leaves browning from tips and edges inwards Ak47 (apparently, I wouldn't know) Germinated 25th feb '17 Miracle grow half strength Solo cups with heaps of holes covering the sides Growing in space bucket 20L 60w led ufo red and blue 3x pc fans 12v 80mm 18/6...