BLACKBERRIES (Black Satin/thornless) For best results plant in early spring as soon as possible, if not, store in cool place keep roots moist. The first year, the canes grow to their full height, the next year they leaf, flower and produce fruit. They are dormant for the winter. These are considered one of the easiest fruits to grow. They are native to the United States and grow as a small shrub or vine. The fruit can be used for eating, syrups, jams, jellies.