purple stems

the stems on my fan leaves have a purple tint to them
2 weeks into flower
they get 15/30/15 bloom booster once a week 2 tablespoons per five gallon pot?
I know its some kind of nute def i have read it on here before but cant seem to find it right now
maybe it was the cannabutter that is making it hard for me hahah
~Ph

purple stems is a phosphorus deficiency

s0cK3y3 said:

purple stems is a phosphorus deficiency

Click to expand...

It can also be genetic.

Usually it's genetic, or it can be a P deficiency, but not after only 2 weeks of flowering. Especially since you are feeding a bloom booster that shouldn't be given until the 4-5 week of flowering, they are getting plenty of P.

I've also seen purple petioles caused by cold temps.

HTH