End of July to end of August
Pick the dark blackberries that come off the cane very easily. If you have to pull hard or there is some red on a blackberry, it is not ripe yet.
Store covered in the refrigerator. Blackberries are very delicate, and should be eaten quickly.
There are only 62 calories in a one cup serving of blackberries. They are a good source of dietary fiber, vitamin C, vitamin K and manganese.