Garden State Bulb Chester Blackberry Bare Roots come directly from our farms and growers in the US. They are winter hardy with sweet blackberries up to 1 inch, just bursting with flavor! Excellent for eating fresh, as well as jams, jellies and pies. These thornless plants grow best in full sun with well drained soil. Please note, it can take 1 to 3 years after planting to reach full maturity size and yielding full production of fruit.