Cant figure it out :(

This is the 2nd grow i have had a plant do this. Because of this it is stunted, so it's probably the furthest from the lights, so it's not light burn. I bought a new PH meter, it re-afirmed my waterings are 6.5.

I use fox farm 3 piece ferts. I also hit them with cal-mag a couple times throughout the grow.

What am I screwing up here?

Are you leaving run off water in the drip trays?

Looks like nutrient burn. Have you checked your PPM?

bandit08 said:

Are you leaving run off water in the drip trays?

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Out of curiosity what is the potential con of doing that? Sometimes I'll be lazy and let my runoff sit in the drip tray till the following day.

Looks like an almost mature plant that is going through it's last gasp.

Guccizillaa said:

Out of curiosity what is the potential con of doing that? Sometimes I'll be lazy and let my runoff sit in the drip tray till the following day.

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Toxic salt build up in the roots/ over fertilisation, that's why we water to run off, to leach out salts. Keep them trays empty bro.

bandit08 said:

Toxic salt build up in the roots/ over fertilisation, that's why we water to run off, to leach out salts. Keep them trays empty bro.

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That's only assuming your plant isnt elevated high enough out of your tray however. If the plant is kept high enough off the tray the roots will never sit in the runoff. I see what you mean though.

How far along are you in flower? At some point the plant chooses to cannibalize itself for the production of Bud.