Claws

[SimonPi]

Besides nitrogen toxicity is there another cause that makes my leaves claw?

 

[oldjarhead100]

it looks like it needs water ,heat can cause plants to wilt,claw
I looked at your picture and could barely see the soil but it looked dry ,what are you using for soil
Where do you keep the plant

 

[SimonPi]

The plant is in a large clay pot, earth is quite good, it lives mostly on my balcony and gets 6-8 hours sun, but for two weeks now we had a heat wave near 39C with hot winds and I brought it indoors.I have two other plants much bigger and healthier, no claws there.

 

[SoOrbudgal]

I think you answered your own question as to why.