Leave edges yellowish/brown

Hello, taking care of my friend's crop who's incapacitated currently. Can you help what's the issue? 2 out of 20 have this kind of leaves.

I can't tell too much from the picture but some of it looks like nitrogen toxicity. The dark green leafs with the tips turned down is a good sign of it.

What happens is the leafs start turning dark and then the tips turn down. eventually the tips turn brown and the edges of the leaf turn brown. Kind of bad but can be fixed if caught early. If that's what it is at this stage you might be better off checking out your nutes, and maybe reduce your N.

Since a good many of the brown tips aren't turned down it could be just overfed. That could also account for n-toxicity. Hard to tell from just one picture.

Wow, you have a lot of trichomes. So many that it's hard to tell if heat could be an issue. (looks like a good smoke)

If you take a few more pictures it would be easier to tell. Distant to see the whole plant, fairly close to see an area, and closeups of serious issues. Top and bottom of the plant. That's really a little more than necessary but you can't have too many. That would make a lot easier to make a good diagnosis. I'd be glad to come back in, just reply and I'll be back.

Thank you man. Tomorrow (in about 13hours), I'll go and take more pictures. It's just weird that it's 2 plants out of 20 like this.

DancesWithWeeds said:

I can't tell too much from the picture but some of it looks like nitrogen toxicity.

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is it better?

Good pictures. In this case I think it's best for me just to set back and watch. I'm not so good a recognizing problems on the more mature plants. Sometimes there can be a couple of small issues. Too much for my fuzzy brain.

There should be someone that can tell you online but no one has caught it yet. Thru the day I'll see if I can post here and you answer. That will draw a little attention. If it doesn't I'll try to send someone over.

We can just start a little conversation about your plants and someone will jump in. Just hit the "Reply" button so I know when to come back in.

It's just weird that it's 2 plants out of 20. Maybe its nothing serious, idk. There's automatic irrigation, same water goes to every plant. I'll bump the thread tomorrow if no one reply. Thanks a lot

Scorpionwincheater2 said:

It's just weird that it's 2 plants out of 20. Maybe its nothing serious, idk. There's automatic irrigation, same water goes to every plant. I'll bump the thread tomorrow if no one reply. Thanks a lot

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That's funny. I just called some one in to help. I thought your whole grow was going south. Anyhow, it will be a good opportunity to meet people. You'll find this is a good place to be.

See if you get an answer pretty soon. If not we'll go a different way.

Bump

Scorpionwincheater2 said:

Bump

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You'd have to share a lot more information, substrate, nutrients, lighting, environment

Yeah the more info you can share the better, but it looks like a possible nutrient/nitrogen burn, but are those autopots? I did some consulting for a grow running in autopots with coco, they had some somewhat similar issues with them- since its a bottom watering+feeding system that only brings water and nutrients to the plants and dosent allow for any runoff you need to be really carefull about your feed strength because you can get quite a lot of salt buildup in those bottom reserviors. I measured water in there with a 9+ EC on some of the plants, and ph was mostly in the 4's, suprisingly most seemed fairly healthy but others had various toxicity and lockout issues, similar to what your experiencing. What is your feed EC and PH in your main reservior? And can you take a sample of the nutrient solution thats in the bottom of the pots on the affected plants, and some healthier ones, and get ec and ph readings on those? If the readings you take indicate thats the issue I can tell you where to go from there.

This is just a grow im taking care of for a friend, im amateur, following his instructions.
The reservoir is 30l and in that is: 45ml Grow, 90ml Bloom, 150ml Bloom Booster. I also have instructions to add PH- 22ml, i will check what's the outcome PH in the main reservoir. Not sure if that's helpful. I put 30l everyday of this.
Light is in the picture. The soil is Coco i think. The watering is automatic from the bottom. I'll check the PH and EC in the water of affected if I'll find some tools here and learn to how.

Okay, yes see if you can find a meter to measure the ec and ph of the water in the bottom of the pots, that will really help figure out the issue. Good for you helping out your friend, im sure they will appreciate your effort.

theres a link to a video that should help explain what I am talking about with ph and ec and how to measure it.