My plants are 2 months old and some of the tips are burnt also the leaves on the bottom are yellow. They are under 400 whatt hps that 16 inches away.What am i doing wrong.
How tall are the plants and what size pots are they in? Sounds to me like it may be too small a pot, and they're complaining from no root space. Transplanting would help greatly with that. As for the burnt tips, my plants have always had the very tips of their leaves burnt. There seems to be no problem stemming from this, though if it's more on yours than it has on mine, it may be early signs of nute burn. ~Lycanthropy
Thanks for the replys .Ihave only fertilzed them once .The plants are about one foot tall and they are in gallon containers.