Just switched over to 15-30-15 for flowering

and my question is what do i need to look for when ive given my plant too much phosphorus??? thanks in advance. Happy Growing

Basic signs of over fertilization, tip burn, tip curl things of that nature.

If you over feed. You'll know within 24 hours..the leaf tips brown first then the whole edges of the leaf s....i have never ever ever given more than half strength..they just don't need that much