Doyle's Thornless Blackberry Plant, 1 Plant, Save $$$ buy one of ours or 10 others, Non-GMO, Natures Best, 10 Times As Much Fruit As Ordinary Blackberry Plants. Trailing Blackberry, Large Bush with up to 5 Canes That Can Grow As Much As 40 Foot Long and with Branches Total Growth Can Be As Much As 600-800 Foot of Vine Annually. Produces in Usda Growing Zones 2-10, All 50 States and Canada 10 Times as much fruit as other blackberries 10-20 Gallons per plant per year possible Produces in all 50 states and Canada Large sweet, juicy blackberries thornless and does not sucker, large bush with canes growing up to 40 foot long