Yellow tips, normal?

[fragemcorals]

This is a Northern Lights plant, on day 9 since the first buds started showing up. From what I've read I think it will be ready for harvest the first week of February. Just today quite a few of the leaves had yellow tips, you can see one in lower foreground of the pic. I've read that this is normal as the plant nears harvest but it seems a little early. The yellow is only on the tips of the leaves, I couldn't find one that had it anywhere else. I know it's not heat burn, I've been getting some of that but only on leaves close to the CFL's. These popped up all over. What do you think?

 

[KingJohnC]

your leaf damage appears to be from nutrient burn. I would slightly reduce the amount of nutrients you are feeding your plant.

here is a nutrient availability chart

here is a cannabis leaf deficiency chart

here is the Cannabis Plant and Pest Problem Solver and the Plant Abuse Chart

Cannabis Plant and Pest Problem Solver - Pictorial

Plant Abuse Chart

 

[CronicHempHog]

What KJC said
doesn't look too bad tho id just follow his suggestion cut back a bit