i recently went back to soil from coco and the canna A+B was just burning the shit out of my plants so i switched to a bottle of tomato nutrients from the pound shop(99p store, tomato nutrients, red plastic bottle made by doff) and the plants have bounced back and are lovely and green now so it may be something you want to test out an see if it works for you, also this one im only using in flower, for veg im using the green bottle from the same store/manufacturer but its a green bottle and is a general vegetable nute