HeirloomSupplySuccess Heirloom Giant Blackberry Seeds (Thornless 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. Just enjoy tons of sun-sweetened berries each summer. Self-pollinating. Zone 2-10 The Giant Blackberry Butte Seeds are (unstratified) and will need to be refrigerated for the necessary cold term. It is not conducive for us to start the germination process prior to shipping as many buyers may delay planting the seeds even after they have received their order. It is our experience that a delayed period of time between after stratification and planting may cause the seeds to return to dormancy state. So it is best to only stratify the amount of seeds that you intend to immediately plant. For colder regions we recommend direct planting in the ground in the fall. However for warmer regions, the use of the refrigerator is necessary to initiate the germination process. 100% Open Pollinated, 100% Non-GMO, 100% Non-Hybrid, 100% Heirloom Bonus Sample pack of seeds with each pack of seeds purchased Genuine HeirloomSupplySuccess TM products may only be purchased from us the Official Brand Owner and only retailer of "HeirloomSupplySuccess products. All other claims to such are false, misleading replica of our authentic products. We do not and will not ever utilize another party to market or sell our Genuine products