When my first crop of blueberries came in last year, Betty commented that we probably could get at least a half a muffin from the harvest. While my eight bushes look a little scrawny, they did survive the tough winter and they have a lot of blooms.
I remember hiking on on Charlie's Bunion last year in the Smokies and seeing blueberry bushes more than 6-feet tall. They probably had never seen the first pinch of fertilizer, compost or iron soil supplement.
Here's hoping for a full muffin this year.