You have pics on my last grow, had same questions.
I cant see whats PH since I dont have PH meter.
Its in soil. I used 0 nutes in veg, and I use phosforus now. 2,5ml per litre.
she has been growing since half of april. its photoperiod and shees outside so temperatures vary. we had drought summer, very hot but last few days were cold, now its sunny again. I have no aphids only some predator bugs but I rarely see them, underneath of leaves look ok