Raspberries, both red and black, grow wild in many parts of the United States. Raspberries are members of the Rosaceae family, and you may propagate these delicious plants from cuttings or suckers and grow them in your garden. The method you choose to start your new raspberry plants will depend upon the time of year you take the cuttings.
Select robust wild raspberry plants for propagating. If you can return to the bramble later, mark the healthiest plants with a small tag for identification after the leaves are gone in the winter.
Dig root cuttings in mid-winter when the wild raspberry is dormant. Take cuttings approximately 5 inches long. Store the root cuttings in a cool, dry spot until early spring. In March, plant the cuttings in rows, in a sunny well-drained spot.
Select sucker cuttings in early spring and transplant directly into your garden. The long root system of the wild raspberry sends up small, independent shoots, called suckers, in the spring. Dig these up, with the small attached root ball, and a section, approximately 3 inches, of the main root and plant immediately in your raspberry patch.
Snip off a 4-inch section of a wild raspberry cane during the summer and place the cutting in sterile, damp sand. Although this method of propagation is not as successful as taking root cuttings, it's worth a try if you can't return to the plant in the winter. Place the cutting out of direct sunlight and mist the leaves with water daily.
Prune your wild raspberries in the spring to produce vigorous growth. Although no one prunes them in the wild, by removing the canes that bore fruit during the previous summer, the new canes will receive more of the plant's energy and may produce more raspberries.
Support your wild raspberries with a sturdy trellis to keep fruits off the ground, or just let them grow and spread into a bramble patch to provide a haven for birds and small wildlife.