Plant showing signs of both underfeeding AND overfeeding.

Some of the older fan leaves on my plant are showing classic overfeeding signs with the tips curling down. This has been the case since I last fed them around 5-6 days ago. My plan had been to let them dry out properly and then give them only water for the next week or 2. But as the day approaches for me to water them I'm noticing that many of the newer fan leaves near the top of the plant are actually showing signs of underfeeding with the slightly yellowing leaf tips. How is it possible for the plant to be showing signs of both overfeeding AND underfeeding? And how should I approach dealing with this issue? Any input or advice would be well appreciated comrades.

This might help;


Is your ph off?

Pictures speak a thousand words

Thanks for the reply I'll try to get some photos tomorrow, the plants are in their dark period right now. I've been PH'ing at 6.3-6.4 in soil.

Sounds like N tox to me ...not under feeding .......N tox causes the tips to point down and if left unchecked it will burn the tips yellow as well .....stay with you plan of just some water feeds and lower you feedings in future feeds

Thanks Indacouch. I better rein in the ppm's once i get back to feeding them in a week or 2. These critical kush have gave me a monster yield in the past but they've also proven to be temperamental little buggers at times too.

N toxicity shows itself by turning the plant overly dark green. If you have tip burn on a very dark green plant it may be n toxicity but need pictures because you could also be lacking calmg and oversupplying other nutrients.

Hey guys. Here's a few photos of what I'm talking about. You can see the downward curl in the first 2 and I tried to get a close up of the tips too. You can see the slight yellowing there. As far as the plant being dark green... I'd say it's just slightly darker green than what I would consider normal but maybe you'll have a different opinion on that. Really appreciate the input again peeps.

They look slightly overfed to me. Nothing major.

It's just gonna be water for the next week or so then. Although I was thinking of throwing some cal-mag in there but now I'm not sure if I should. The magna-cal+ I use from Plant Magic has an N of 2... do you reckon I should forget about using it for now?

GreenGoblin88 said:

It's just gonna be water for the next week or so then. Although I was thinking of throwing some cal-mag in there but now I'm not sure if I should. The magna-cal+ I use from Plant Magic has an N of 2... do you reckon I should forget about using it for now?

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I would use just water. Those plants dont need even a little n right now.

Just over fed those spicks could be bringing from the light when the droplets landed on the leaf but the tip is nute burn and the clawing us 2 much n add water next time maybe with a little cannazyme or rizotonic or even just straight water tbh

new growth can just be a lighter green especially compared to a plant with a nitrogen issue so the lighter new growth is likely completely healthy. Someone mentioned, no additives for a week then on the following watering reassess. Likely it will be ok to feed it, idk what you're feeding but might be smart to cut it down by half. The goal is to find what the plant can handle and get on a schedule. For me and what i use i can generally just feed once a week and water one time in between plain water. I never feed twice in a row and i may add or remove additives depending what they Are looking like. Also the tip burn is not a problem. It happens, some get light light tip burn at some point and that's when you know you have hit the plants capacity to take in nutrients. Then you can adjust slightly based on that but it won't have a long term negative effect of any kind. Now if it starts to travel up the leaf that's a different story.

Thanks for the advice guys. The plants got straight water last night and they seem to be loving it. Although I've noticed something today you might be able to help me with. I see some shiny residue on some of the leaves which has the look of thrips about it. I'll start with the neem oil when the lights are about to go out today. The only thing is I've been all over the plant and haven't spotted a single thrip or anything else moving. Could anything other than bugs be causing little patches of shiny/silvery residue on the leaves? Here's some photos. They aren't the clearest photos but the marks you're seeing here are definitely shiny/silvery residue.

None of those pictures are focused.. Check the underside of leaves and take a small handful of soil and sort through it looking for little worms also take note if anything is flying around... If all is good.. LEAVE THEM ALONE LOL you're worrying and picking too much. common beginner trait that leads to problems instead of solutions.

lol You're right, I do worry too much about them. All part of the learning process. But do you think giving them a few sprays with the neem oil could be detrimental? I was thinking to do it just in case.

I'd just leave them be, Less is more man..i would not spray them unless the damage continues on new growth. If it's only large leaves with issues it likely isn't bugs, only the lower half of the plant and either not bugs or it was one or two and they died. you shouldn't even own neem if you haven't had bugs for sure yet, not worth spending the money just because and anyway neem is only mildly effective.. Do one good search for bugs and if you look hard and don't find any, they aren't there.

Plus if you do have a pest and just neem the plant and it stops it, you will still not know how to find it in the future. You will be stuck on this mindset of, "maybe bugs? Must use neem"...