Firmly pull up the stem of a blackberry cane, with heavy duty garden gloves, to loosen some of the roots. Expose about 6 inches of the root and cut it with the pruning shears.
Prune off the cane so that there is only about 6 to 8 inches left, pruning just above the site of a bud.
Grab some of the soil where the wild plant was growing and wrap it around the root of the plant, wrapping it in plastic or paper to keep the root moist.
Plant the wild blackberry plant as soon as possible in your yard where it can get about six hours of sun during the day and have plenty of organic matter in well-drained soil. Dig a hole large enough for the size of the roots about 3 inches deep and fill it back in with the same soil. Water the cutting well for the first few weeks to encourage new growth.
Space other wild blackberry plants at least 2 feet away to give them enough room to grow.