Diagnose my claws

2 days ago I supercropped 5 of my 7 plants, yesterday they were good but today some of them (not all) show some symptoms of claws. Non-cropped 2 plants also have claws, so I think supercropping is not the real reason of claws. Claws looks like nitrogen toxicity but I'm always careful about the NPK values and believe less is more.

So I suspect 3 different reasons.

1-Diatomaceous earth.
This time I sprinkled 1 table spoon of diatomaceous earth in each pot to help them recover supercropping since silica would help them repair their stems. But it doesn't make sense because people add %10 diatomaceous earth on their potting soil, 1 tablespoon is nothing.

2-My new fertilizer.
After cropping, I watered and fed them with 20-20-20 fertilizer. (diluted 35 times, so it is 0.57-0.57-0.57). This is actually %20 more diluted than the manufacturer's instruction. My plants are just at the begining of flowering, that's why I used equal amount of NPK. This is the first time I used this product, produced by a well known brand in my country. I also used many products of this brand and had no issue. This fertilizer was marketed with the slogan of 'greener leaves' and produced in my city. I personally met the producer and asked her which micro or trace elements are responsible for greener leaves in this fertilizer and she said nothing is different except higher NPK values, micro elements are pretty balanced so I bought it.

3-I haven't drained out water for the last 4 weeks. I usually let the good amount of water to come out of the drainage holes to clean the soil and get rid of the excess materials and salts, but the last 4or 5 watering I was so lazy to do that. So this is currently my prime suspect.

Since number 3 (not draining out) is the most possible reason to me, tonight I'm planning to rewater them without fertilizer and clean the soil. My drawback is soil is still wet and I don't want to cause an overwatering issue. The soil has a lot of coco coir and it is fluffy, but I already watered it 2 days ago.

So what is your diagnosis and what do you suggest me to do?
Thank you.



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Nitrogen toxicity. It appears to be a recent thing and still quite slight, so it's easily resolved.

Lower the amount of whatever bottle has the N in it slightly for two waterings. If the problem is gone, you're good. If not, reduce even further for another two watering
So how about flashing as an emergency? Will it help or cause overwatering? I had nitrogen toxicity before and the leaves never recover. So maybe flashing solves the problem before it gets too late, right?
 

spek9

Well-Known Member
So how about flashing as an emergency? Will it help or cause overwatering? I had nitrogen toxicity before and the leaves never recover. So maybe flashing solves the problem before it gets too late, right?
Do you mean flushing? I've never done it, and I don't foresee me ever doing it.

Reducing N will always fix an N tox issue, unless of course you're doing something else wrong (incorrect pH, over fertilization of other nutrients that cause more N uptake etc).

Do you have an EC or PPM meter?
 
Do you mean flushing? I've never done it, and I don't foresee me ever doing it.

Reducing N will always fix an N tox issue, unless of course you're doing something else wrong (incorrect pH, over fertilization of other nutrients that cause more N uptake etc).

Do you have an EC or PPM meter?
No I don't have. I only have PH papers but haven't used them for the last 3 years, I never experienced PH issues since then. It is consistently something like 6.5
 

spek9

Well-Known Member
No I don't have. I only have PH papers but haven't used them for the last 3 years, I never experienced PH issues since then. It is consistently something like 6.5
"consistently something like" isn't how I work. If one doesn't know what their pH is, you're working blind, and if pH is off by enough of a margin (it doesn't take much!), any advice given to you may make things worse.

I highly recommend you get a meter. If not, at least break the strips back out.

You haven't stated what medium you're in either, so it's only a guess as to what your pH should be.
 

spek9

Well-Known Member
Sorry I didn't mean literally flushing, I mean watering until it drains out a little. Still don't?
That's called "watering to runoff". I usually see a few drips come out of my pots. That's all. Some people water until they get 10 to even 20% runoff. I've never found the need. Mostly I've found growers who run that kind of runoff are in coco.
 
That's called "watering to runoff". I usually see a few drips come out of my pots. That's all. Some people water until they get 10 to even 20% runoff. I've never found the need. Mostly I've found growers who run that kind of runoff are in coco.
Yeap it's called runoff, I was looking for this word. I use %30 coco coir, %10 perlit, and the rest is commercial soil. I usually get %20 runoff and didn't know I don't have to do this.
 
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