nute burn? or...

Hi

Can anyone tell me if this is nute burn or a deficiency of some sort. I checked the plants yesterday and saw this, flushed them with ph'd water but it looks the same or a little worse this morning.

I'm using nft system and switched from 1/4 strength to 1/2 strength nutes about a week ago. The yellow bits on the leaves appeared a couple of days ago and looked bad yesterday hence the flushing. Looks pretty sick this morning. Thanks

I'm not an expert and have problems of my own, but logical thinking leads me to think that the increase of nutrients has caused this. My deduction comes from this "1/4 strength to 1/2 strength nutes about a week ago."

It looks like the yellow spots are on the foliage that just grew out in this past week. Instead of adding nutrients wait for deficienty this does however have a time sensitive go to it. If you wait to long then its harder to cure and so forth.

I hope that this helped.


BTW the leaves on the plants seem like a very dark green and that might be N overdose...

thanks for your reply. How long should I keep the plain water in the tank for, ie when can I feed them again (back to 1/4 strength).

Looks a little like Fe deficiency, I'd keep giving it plain water for a few days until you see some "normal" new growth then ease back onto the nutes. How do your roots look? White, crisp, nice nutty smell? Those leaves probably won't recover.

Plain water untill new foliage looks fresh and strong. If you have time to mess around, you can increase the dosage of your nutrients day by day little by little and watch what happens. The best way to learn is by doing and experimenting!

I'm a soil grower so hydro is a little over the top for me, O2 levels are very importan in hydro from what i'VE read. And tbh for my nutrients I eye ball it all like a cook who knows what he's cooking.

GL with your grow lets hope yeild will be great!