Locally, there are some foods that are only available fresh duriing the summer months. One of those foods are blueberries. Check out this information in the link below.
(Oh, and just to let you in on my own favorite way to eat blueberries during the summer . . . try freezing them as described for later use, but then eat them frozen as a snack. Better than popsicles!)

https://www.foodhero.org/sites/foodhero-prod/files/monthly-magazines/web_blueberry_monthly_july_18.pdf