Blackberry Root Cuttings, Another option for your planting needs is to plant the root cutting of a Blackberry plant. The roots we use are from tissue culture Blackberry plants, these are the most vigorous and healthy rooting you can get. The root cutting has a live percentage of 60 to 80 percent. We only sell roots in lots of 100 cuttings priced at $70.00. Please note in the order comment option list the name of the variety you want, cuttings are available in these varieties. Apache, Arapaho, Ouachita, Osage.