Variety selection will be based upon your specific location and variety characteristics differ and are to numerous to be covered here. But, remember that blueberry plants are not self-pollinating so you must purchase two cultivars and plant at least two plants.
The berries themselves should be firm, plump, free of foreign debris, and as close to ripe as possible. Reddish berries are not ripe and will have a bitter taste due to the low sugar content. (Blueberries will not continue to ripen after they are harvested.) Over ripe berries will be soft and may have a wrinkled appearance. Fresh blueberries should be stored in the refrigerator and washed just prior to using.