New Grower Trans Siberian Auto leaf tips

[Misanthrope82]

Hi guys. Got a trans siberian auto here that is 33 days old today. I had a question regarding some of the leaf tips being discolored. I don't think it's nutrient burn, as I only feed them every 4 days and I'm using a quarter of the dose listed on the box (using general organics nutrients):

http://www.amazon.com/General-Hydro...&sr=8-1-spell&keywords=general+organicsgo+box

I'm using fox farm ocean forest soil in 3 gallon pots and I'm using 24 hours of light. 600 watt hps light but it's dialed back to 75%. It is barely hot to the touch and I keep it about a foot and a half away from the top of my plants.

Hopefully these 2 pictures can show you what I'm talking about. Any advice would be appreciated. Thanks, everyone.
.

 

[Grey Bear]

hmm,
It looks like nute burn, I don't know how hot the OF is on its own.
I would give it plain H2o on the next cycle and see what the new leaves do.

 

[Joedirt]

OF is a hot mix for autos.
next time mix it 50/50 with some lighter soil like happy frog.

 

[Joedirt]

jared a ts 4 weeks ago.
still has a fruity smell and the stone is more like a bolder!
WHAM! hits like a truck.