Hey, buddy! 👋😇
Such leaf finger deformities indicate a phosphorus deficiency in the plant's nutrition! You're already in the 7th week of growth, just one more step and it will be flowering, it's currently in the pre-flower stage! You should have already increased the phosphorus content in your watering!
For the soil, I recommend increasing the Mammoth P addition and setting it to 0.3ml/l
Next week, make it 0.4ml/l
After 2 weeks of flowering, make it 0.7ml/l
After the middle of flowering, make it 1.1ml/l
In the last week of ripening, before flush, make the Mammoth P addition 0.3ml/l 😇👌
Good luck, bro! ✊😇