Yes, hair transplants can grow in and around the scar, so as to completely camouflage it. I've had this done myself.
I would wait until you're a year out from facial surgery, so that the scar is fully healed and settled. Hair transplants (done well) are inserted at particular angles to the scalp to look natural, and you don't want a scar that's still changing messing with that aesthetic.
I hope you're healing well, and happy with your results!