A type of blackberry, boysenberry grows on shrubs or plants. The fruit has more of an acidic or tart flavor than the blackberry, and the berries are larger and dark purple to black in hue. Plant boysenberries in the spring after frost danger passes for your region. Purchase plants with strong, sturdy-looking canes. Young boysenberry plants can be damaged in cold winters; gardeners may need to cover plants with burlap or provide other frost protection.
Choose a location that offers full sun, well-draining soil and protection from wind. Boysenberries need full sun to ripen; the plant's canes can become damaged in heavy winds. Boysenberries aren't particular about soil pH or soil type, so gardeners should not need to make amendments.
Dig a hole twice the size of your boysenberry plant's root ball. Remove rocks and weeds from the hole so the plant can get established without competition.
Pull your boysenberry plant from its container. Wear garden gloves to avoid pricks from thorns. Break apart the plant's root ball by working it between your fingers. Unwind tangled roots and break apart any dry soil clods that cling to roots.
Set the plant in the ground at the same level as it was planted in the container. Backfill the hole with soil, pressing the soil gently around the roots. If you're planting more than one boysenberry plant, leave 4 feet of space between plants.
Water the newly planted boysenberry to compress air bubbles in the soil. Add water until the soil is saturated.