i have a couple plants im growing and they all resently started getting light brown and yellow spots on the lower leaves and some leaves have shrivled up brown and dry. most of the plants havent ever been fertilized, they are growing inside in soil under a couple random florecint lights.some plants are about 1 1/2 months one is about a year and even a spot has appeared on one that is only a week(its on one of the first round leaves). im thinking maybe the pH?
id guess some type of root mite they look malnurished in my opinion, and if something is eating the roots thats just what it will do
they need feeding and they are streching badly and need way more light & lower the flouro's about 3-4inches above the plants. whats your lite cycle? are these clones or seedlings To rule out PH related issues complete a soil runoff PH test.......& test your tap water with PH corrected water (6.5-6.8PH ) pour enough water in the pots so the water runs out the bottom of the pot ...test the PH of this water....
the plants are on 18/6 and they are seedlings not clones.was the other guy right about the bugs?do u think it could be that?