is there a way to change a deals rotting specifically to a deal and not just through editing the pipeline deals section?

My deals are with contractors which they may make a decision in one month or in 8 months.

I want to be able to contact them when needed but not too often.

This way I can visually know for each specific job when to move it into the next stage from the deal view area.

Currently everything is set solid with a rot date.