Twisting, curling, crispy leaves

Nutrient (nitrogen) toxicity............you are feeding way too much or too often.........or both.

Hi, when the leaves of a cannabis plant are pointing upwards and take on the claw shape, it can be a sign of heat or light stress. This often happens when the lighting is too intense or the plant is too close to the light source. It could also be triggered by high temperatures or low humidity. To fix this, you should check the following: Light intensity: Make sure the lighting isn't too strong or the lamp isn't too close to the plant. Temperature: Keep the temperature in an optimal range (around 20–28 °C, depending on the growth stage). Humidity: Ensure that the humidity meets the plant's needs (e.g., 40–70%, depending on the stage). Watering: Make sure the roots aren't under dry stress, but avoid waterlogging. What I've also noticed is that they are very dark, which can also indicate over-fertilization with nitrogen, but I lean towards the first point. With nitrogen, the claws tend to point downwards.

Cannabis leaves can curl up or down for a few reasons. Sometimes it's because of too much heat or light, or overwatering. Other times, it could be a sign of nutrient problems, like too much nitrogen. Pests or diseases can also cause curling. Okay, here's a few more reasons. It could be due to pH imbalance in the soil, windburn from strong fans, or even the plant's genetics. Honestly I think some of the problem might be to much nitrogen the leaves are very dark also I think heat could be a cause aswell when I put my plants really close to lights like when I’m using a weak light and have to put the plant only a few inches away that can cause some stress from the heat from proximity to the light it self Also next time you water I’d make sure to check the ph level of the run off it could be off causing problems Also make sure your rh is in a good zone it’s possible your humidity is to low causing stress to some of the stigmata