looks like P or K def, not sure which. Either because of a lack of nutrients available in soil or because over feeding has caused a lockout. If you have been feeding regularly then I would suggest just watering with ph'd water until about 10-20% runoff until they straighten back out.
If you have not been feeding, then I would start giving them some nutes about half strength what the bottle says. The damaged leaves wont recover but it should stop spreading/ effecting newer leaves. I'm assuming the pic is of lower leaves?
looks like P or K def, not sure which. Either because of lack of nutrients available in soil or because over feeding has caused a lockout. If you have been feeding regularly then I would suggest just watering with ph'd water until about 10-20% runoff until they straighten back out.
If you have not been feeding, then I would start giving them some nutes about half strength what the bottle says. The damaged leaves wont recover but it should stop spreading/ effecting newer leaves. I'm assuming the pic is of lower leaves?