Blackberry 'Chester' is a vigorous, thornless blackberry variety developed by the USDA and introduced in the 1980s. It was bred for superior disease resistance, cold hardiness, and large, sweet fruit that holds its shape well. As a late-season cultivar, it ripens later than many blackberries, extending the berry-picking season into late summer. The plant produces long, semi-erect canes that typically require some support, especially when heavily loaded with fruit. Canes can grow up to 10 feet long, forming an arching habit. Chester’s berries are glossy black, firm, and medium to large in size. They grow in clusters and have a mild, sweet flavor with just a hint of tartness when fully ripe. These berries are less likely to leak juice or become mushy, making them excellent for fresh eating, baking, and preserving.