I see several things.
1. Over fertilization.....don't give any more nutes.
2. Incoming pH too high. Use molasses (unsulphered) to lower. CHECK PH EVERY WATERING.
3. Rocks in bottom of pot, no good. Next time use pots sized to plant and let them grow into them. As you repot this adds new mix and essentially fertilizer.
4. If it is still moist on top, you may be overwatering.

Again, pH can vary greatly in just one day. Check every time.