How big are the plants? What is the strength of the fertz? How often are you foliar feeding? What size pots are they in? To me it sounds like you have over fertilized them for sure.
Foliar feeding and fertz every week. Sounds like too much. If the PH is off, even if the nutrients are present, the plants won't be able to use them. As well, are they outside or in a window?
I would take the plants out of their current pot, rinse off the roots. Re pot in some new potting mix. I think you will see some improvement.