Super cropped marijuana with brown tips

A question from a fellow grower:

the tips of the leaves on my flowers are turning brown. They have looked really good I super cropped them. I have them in potting soil and I don’t know if I over watered or to much miracle grow.

Over watering, over fertilizing, and getting too close to the lights can all cause parts of the plant to turn brown. If you’ve over fertilized you need to flush with plain water, if you are over watering, you need to let the soil dry out a bit.