Im preparing my hop yard, and also learning how to wash yeast, and also working on capturing wild yeast. Is it possible to capture yeast from a mix of berries and flowers? Also could we mix yeast, per example saison washed yeast with wheast beer yeast?

Most of my brewskies have a thin layer of yeast (?) on the bottom of the bottles. I was wondering… Assuming this is yeast.. should I be able to use this deposit to make a new yeast starter? Or is this yeast completely dead after, say 6 months? Do any of you guys have any expedience with this...