PH spotting generally from wild PH swings, nitrogen is already locked out, you need to get this under control ASAP, this will stop bud resin production

To rule out PH related issues complete a soil runoff PH test.......
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....

If the PH reading is out of optimum range 6.5-6.8 PH, you need to flush your plant.
Flush with PH corrected water, till in optimum PH range, 3 times the volume of the pots rule of thumb but may require much more flushing if the rootball is thick & sour

EG: 1 gal pot = 3 gal. flush

add 1/2 strength nutes to the last gallon of the flush.


your buddy needs to start ph correcting EVERYTHING that goes in the pots