Easy to grow and a favorite for fresh eating, jams and cobblers, blackberry plants are a favorite for home gardeners. Cultivated blackberry varieties for sale usually produce larger, sweeter fruits than wild varieties. Many thornless blackberry varieties are now available—making picking easy. When selecting blackberry canes to grow in your garden, make sure they are suitable for your grow zone or hardiness zone. While most blackberries will grow in zones 5-9, some are better suited for hot weather. Blackberry plants grow best when planted in full sun, or six or more hours of direct sunlight daily, and in well-drained soil. Many gardeners plant blackberry bushes near a trellis, making them more manageable.