Varies according to weather conditions and variety.
Recommended planting for a family of five
Blackberries are used fresh, frozen, canned in syrup, jam, juices, and components of baked goods.
For optimum flavor, harvest berries when they are fully ripe. They develop their maximum sweetness just as they begin to turn their characteristic color - usually from bright red to blackish red. Ripening usually lasts for about two weeks beginning in mid-May for early varieties and into the fall for late-ripening varieties.
Handle the tender berries carefully.
Storage and Preservation Methods
Fresh, frozen, bottled, or dried. Fresh blackberries must be stored in the refrigerator if storage is necessary. They soften and bleed at room temperature.