Started to notice around 2nd week of flower. Worsening but only on a few of the old fan leaves which don’t get any direct light. Strain: Biscotti Mintz from Barney’s farm. Grown in soil, solution ph’d to 6-6.5 every time, organic grow. All additional details in diary.
Solved
Leaves. Veins - yellow between
Feeding. Deficiences