The only way I've found to grow your hair is not to cut it. Seriously, the number of people who would ask me how I got such long hair (before i chopped it) and say they had theirs trimmed every two months (on advice of their hairdresser ). was mad. Just keep away from scissors for a year at least. It's the only way! Xxx
I don’t think a trim encourages growth given that the hair is dead but you should keep the ends neat and tidy to prevent them from fraying further up the hair. I can’t see split ends on the photo but after 9 months I would say you are definitely due a trim.
Trimming gets rid of split ends. Split ends tend to split and break, leave the ends very thin. Trimming won’t make it grow but will make the ends look fuller. I think a trim of half an inch or an inch every 4/6 months does help with keeping it looking nice while growing out.