Probably Over-fert... Your opinion?

Hello, I've recently started utilizing the whole DNF fert. line (previously just used Gro/Bloom A & B) and I'm beginning to see the leaves start yellowing, and the tips are getting crunchy. I believe the problems are merely an over-fertilization problem, but I decided the make sure.

Any and all help will be GREATLY appreciated.

It looks like it could be a little over fertilization although overall your plants don't look very fertilized. I don't know what your soil situation is, but I would lay off the ferts with clones this size.

Thank you for the rapid response.

The medium is 4 parts Pro-Mix and 1 part vermiculite 1 part perlite.

I had been using a half strength fert solution meant for seedlings and cuttings. I will most probably flush with some Ph'd water for the next couple days and continue with the dilluted fert formula.

whats the soil temp? looks like they might be chilly is soil PH ok? don't worry too much unless it progresses good luck

I'm not sure of the exact temperature but I have a heat mat set to 75 degrees F. I believe the temperature could be a problem now that you mention it. We've had a cold snap and the veg room is against an outside wall. I will set up my space heater there until it warms up again.

I have not checked the PH in the soil recently which I should also be doing, but I have been giving a drink of plain PH'd water every 2 days or so to try to combat the problem.

I appreciate the responses.

If you haven't been PHing your fert mix, you should start doing that. Alot of ferts drop the PH alot, so that might be your problem. As mentioned, they don't look dark green like an overfert problem, so it could be high PH. It's also likely an overfert problem too, as they won't need any fert for quite awhile yet. You might want to gtive them a light flushing and wait for them to recover. Then wait another 10+ days to fert again, at low strength.