Blackberries Tasty, easy to grow and nutritious, it's no wonder more and more gardeners are planting blackberries. Cultivated berries are sweeter and larger than wild varieties—and usually grow in zones 5-9. Blackberries are chock full of nutrients, including antioxidants. While excellent for eating fresh, try them in blackberry jam, blackberry pie or cobbler. Gurney's carries a wide selection of blackberries, including several thornless varieties—making picking a breeze.