Anyone know why a healthy plants leaves are clawing down

Hi does anyone know why leaves do this? Plants been this way for a while but has stayed healthy.

Built said:

Hi does anyone know why leaves do this? Plants been this way for a while but has stayed healthy.

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Update, so i just checked ph and it was acidic around 5 so i added just a little calcium carbonate to raise it slightly aiming for 6-7 maybe that helps? All trial and error

Possibly nitrogen toxicity clawing

Some strains hate excess N, that’s my guess. How do you check ph?

green_machine_two9er said:

Some strains hate excess N, that’s my guess. How do you check ph?

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I just use a ph meter in the soil, probly not the most accurate but it gives a rough idea, it was around 5, so i added some calcium carb, its now reading 6.5 to 7. i used a fair bit of worm castings in the beginning but it wouldnt think that could do it, maybe it was a bit too much, other than that im always pretty light on the fertz. Still growing ok though thats the main thing