Turns out "harvest calendar" is the magic term, but I got what I was looking for even without that phrase. The fruit ripening calendar for Massachusetts is as follows:
Mid-June: Strawberries, Cherries
July: Blueberries, Blackberries, Raspberries
August: Blueberries, Nectarines, Peaches, Pears, Raspberries
Mid-August: Apples start
September: Apples, Cranberries, Grapes, Raspberries
October: Apples, Cranberries
For a more complete harvest calendar, check out the PickYourOwn.org website. This could be the summer where you reduce your carbon footprint... and support local businesses while you're at it.
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Photo courtesy of Tougas Farm in Northboro, MA.