FUE hair transplant post 8 months: crown area results, I am not happy with the results. (Photo)

It may take 6 to 12 months to see the results of a hair transplant surgery.  If you are concerned it is best to discuss it with your doctor.

I wish you had a pre-op picture to compare however you may get more growth up to a year. Definitely ask your hair restoration professional.

Without a before picture it is impossible to judge the results. Often crown cases require more time (up to 12-18 months) for the full effect.

Actually takes 10-13 months for hair to become full mature , as thick and bright  as native hair. But you would better to plan a second session of hair transplant  for crown area to increase the density.

It is too hard to tell without all of the details how you are progressing. The best person to discuss all of this with is the doctor that performed the procedure. They will have before pictures to compare as well as have a better understanding of an estimate of your particular timeline. Everyone is different and hair will grow at different stages for everyone. 

If you are not happy with crown growth, return to see your surgeon and have a discussion with your surgeon about your disappointment