藍莓 should be sold in a box, it is very difficult to choose one by one. you only can choose the box with the bigger berry, no BAD/broken 藍莓 inside. Wash them before eating, otherewise they will damage soon. Normally end of Mar - beginning of May is the best season for all kinds of berry, e.g. strawberry, blueberry, rasepberry. hope this information can help you.