will blow drying my 4b hair weekly and putting my hair in a poinytail daily stunt my hair growth
I don't think it will! That's based on my opinion though... If you haven't experienced any breakage, then there isn't anything to worry about!
Ive heard of putting your hair in frequent ponytails can put a little tension on your edges and can cause breakage there. And for the blow drying that seems like alot of heat especially with summer coming.
As soon as your hair starts breaking you've done too much. Make sure you use a heat protector and deep condition!!