Need help

My monster crop leaves are turning yellow a d drying. I can't figure out what is going on.

What week are they in bloom? What's the ph? Are you in soil or hydro? How do the roots look do they smell bad? Looks like it can be a few issues. Like why you only have one leaf on the cluster instead of 3+. Could be over nutrients, ph is off, nutrient deficiency. Deasease like tobacco mosaic virus. Do you smoke around or touch your plants bare handed before washing?

One leaf happens in the beginning of a monster crop. Its weird buy yea. It ended up being spider mites.