So, by 6 months generally you will see the most of your results if you only transplanted the front. Let's say 85%. There will be further thickening and maturation of the hair, some multi hair grafts sprout at different times, and by 9 months you will probably be at your final result.
The crown takes longer due to less blood flow, so by 9 months you will see most of your results, 85%, and some further maturation in the next few months to come.