Leaves are dying and tips turning almost purplish black. Whats wrong? (pics) +REP

Didnt water for maybe 2 days...got them about 7 to 10 inches from light...could just be heat stress / burned tips?

As far as i know I havent been using any nutes for the past week or two because I've been meaning to transplant in to bigger pots.

They are overdue for a transplanting
in Happy Frog
400w ceramic metal hallide (makes for good pics)

Please help

Some one please help~!

Transplant, water with a root booster 5 15 5 or somthing like that. My guess, root bound probably

Awesome i was hoping that's all it was thanks so much. been meaning to transplant anyway only had enough soil for one 5 gal and that one is still healthy as ever. Thanks

A week or two without nutes? That will fuck up any MJ plant.

Repot and use a better medium next time with more perlite and start monitoring the ph of feeds/water 6.5 or they will yellow again.