Blackberry Thornless Evergreen A thornless specimen; the Blackberry Thornless Evergreen finds it easy to harvest fruits, & produces large yields of berries each August. In Summer; white flowers develop on this hardy shrub, sprinkling its evergreen foliage with the promise of what’s to come. As the fruits of this Rubus appear, they turn from green to red, & then to glossy-black, looking plump; signaling the time has come for these berries to be picked. Height & Spread: 300cm (118”).;