123Growanswered grow question 3 years ago I am going with Cal-Mag first in gallon of water
Then going to have you add 1 TBSP of molasses to the cal-mag water.
Only cal-mag and molasses, make sure it’s unsulphered please ( molasses) in ph balanced water. Add that mixture to your plant
Rather err in caution than blast your plant with unnecessary nutrients furthering the issue
It looks to me like a magnesium deficiency due to the veins of the leaves remaining green, but the yellowing is happening.
It also is happening on older leaves first , which means it’s pulling from older leaves to supply life to younger leaves. That means it’s a mobile nutrient, not immobile.
Magnesium is mobile, while calcium is not.
Coco-coir uses cal-mag very readily unless you are using organic nutes and then that issue is resolved.