peter out

verb, ‘peter’ [fol. by out] decrease, diminish or fade gradually before coming to an end (COD)

“I mean, we used to have dances here all the time.”
“But then it just petered out, eh? It sort of petered out for my wife and I after we got married and started a family. There were a lot of young families in our area or in our age group.”

“You kind of petered out of the asparagus, right?”
“Yeah. It petered out commercially.”