Headlights kush, blueberry, lemon haze

All the strains are doing great the lemon haze is flower beautiful and no height problems , isn't a heavy feeder either some of the girls especially the headlights kush auto (N) level has steadily decreased the past week leaving to a slight fade in the plants bottom leaves losing colour. The blueberry seems to be getting on okay but still seems like a harder strain with higher requirements and less nutrients required also I'll update this weeks with more information and more photos 📸