HeirloomSupplySuccess 25 Heirloom Giant Blackberry Seeds(Black Butte) Rubus Black Butte is a vigorous blackberry with long, trailing, thornless canes, white flowers in summer followed by large, dark blackberries in late summer. Height: 8ft (2.5m) Spread: 26ft (8m). Best in sun or partial shade. Soil Type: Any good soil, mulch in spring. Fruit size: Very large. Cropping: Heavy. Picking Time: Mid July Bare Root Plants are sometimes sold around May to June as bare root plants If you simply cannot wait for those first Blackberries of the summer. Keep checking our other listings around that time for Bare Root Plants Giant Blackberry is for you! Berries ripen earlier than any standard variety (mid June) and bear a smaller crop again in the fall. Plants are hardy and vigorous, with very few thorns and fruit spaced openly for ease of picking. Easy to maintain and disease resistant—just enjoy tons of sun-sweetened berries each summer. Self-pollinating. Zone 2-10 100% Non-Hybrid, 100% Open-Polinated, 100% Non-GMO