Anyone here have very long hair with this issue? If so …

Comment on How Often Should i Wash my Hair if I Have Dandruff? by Rainie.

Anyone here have very long hair with this issue?
If so how often should the hair be washed to keep scalp healthy?
Since my hair got so long I’ve only been washing once or twice a week..
I thought it would be better..
Any help would be greatly appreciated..
And which if any brand dandruff shampoo works best with the least fragrance , side effects.
Rainie