Hair plateau and hair masks.

I wish to have ankle/floor length hair someday. My hair is till tailbone length right now, thin and full of split ends. So it's not very healthy. If I use hair masks every week then it does look healthy but split ends doesn't go away. Last 1 month I didn't use hair mask at all and it became rough and was breaking.

I tried trimming it to get rid of split ends, but even that didn't help much. However my hair did grow an inch after trimming it and now again it has meet an plateau. Not growing any further.

How many times a week/month you use hair mask? And how to get rid of the plateau?

Hair plateau and hair masks.