New leaves turned yellow

Hi
I am a somewhat novice grower. I have a plant whose new growth turned yellow. The edges of some of the bigger new leaves are green around the edge but yellow inside. See the attached pic. I am growing in coco. This all happened very quickly right around the time I fertilized. I don't think I over fertilized because only one plant was affected. I flushed the plant anyways because after 2 days it wasn't getting any better. I am using Pure Blend Pro 3 2 4 vegetative fertilizer. Any ideas?

Are you using any other nutes?

Also do you ph test your solution?

Just curious u adding any cal mag?

Looks like possibly an immobile nutrient problem. Do you know the pH?

Sorry I should have mentioned the ph. It was right around 6.0. After I flushed the plant the runoff water was ph 5.2. Yes I am using call mag 2.3-0-0 and zenzyme natural enzyme preparation.

If you're in coco, the flush did nothing to help you, and while I'm not a proponent of pH'ing run off, 5.2 is too low which will for sure cause you issues. You should be pH'ing your feed to @ 5.8, and this is what should be coming out of the bottom of your pot more or less. If not, mix up enough feed to run through your pot until what you're putting in, is coming out the bottom. Once you do that, relax and let the plant work. Also, your coco looks dry...you shouldn't let it run dry...ever. I'd get a handle on your feed, be sure it's at the proper strength and pH. Once you do that, feed your plants...every day. Good luck.

Thanks everyone for all the advice. If the PH was that far off you would think it would have affected the other plants as well, but they are all doing well. I will try CannaCountry's suggestion and run ph'ed nutes through until I see 5.8 coming out the bottom. Again thanks sooo much. I love this forum!

Ehjay111 said:

Hi
I am a somewhat novice grower. I have a plant whose new growth turned yellow. The edges of some of the bigger new leaves are green around the edge but yellow inside. See the attached pic. I am growing in coco. This all happened very quickly right around the time I fertilized. I don't think I over fertilized because only one plant was affected. I flushed the plant anyways because after 2 days it wasn't getting any better. I am using Pure Blend Pro 3 2 4 vegetative fertilizer. Any ideas?

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Hi there. Did you ever figure out what the problem is ? I’m having the same issue but in fox farm ocean Forrest soil