Thorny
Kiowa Blackberry is a summer-bearing floricane variety that produces some of the largest blackberries you'll encounter, with individual fruits reaching up to 3 inches long. Hardy in zones 5 to 8 (some sources extend this to zone 9), these thorny canes bloom early in June and deliver their fruit within one to two years of planting. What makes Kiowa exceptional is not just its enormous berry size, but its heat tolerance and abundant 6-week harvest window, making it a standout choice for gardeners in maritime climates and across much of the country.
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Full Sun
Moderate
6-9
60in H x 48in W
Perennial
Moderate
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Kiowa blackberries grow to truly massive proportions, often producing berries so large you can make a fresh cobbler with just a handful. The canes are vigorous and upright, flowering early and yielding over a lengthy mid-to-late season harvest even when summer heat turns brutal. Self-pollinating and requiring only 200 to 300 chill hours, this variety thrives where other blackberries struggle, from the South through cooler northern regions, all while the thorny canes remain surprisingly manageable when tipped and trained.
Kiowa blackberries excel in fresh applications where their extraordinary size makes them showcase-worthy, particularly in cobblers and preserves where just a few berries go a long way. Their abundant harvest and excellent juice content also make them well-suited to wine and juice production, though many gardeners find the fresh fruit so compelling that preservation becomes the priority.
Transplant Kiowa blackberry canes in early spring into full sun locations with well-draining soil. Space plants 48 inches apart to accommodate mature width and ensure good air circulation around the thorny canes.
Kiowa blackberries ripen in early June and provide a generous 6-week harvest window. Pick berries when they are fully black and easily separate from the cane; at full maturity, individual fruits will reach up to 3 inches in length. The sheer size of these berries makes harvesting efficient, as you'll fill baskets quickly.
As a summer-bearing floricane variety, Kiowa produces fruit on second-year canes. In spring when new canes reach 3 to 5 feet tall, tip the sturdy, upright growth to encourage lateral branching and create a more compact, manageable shape; this single step eliminates the need for trellising while strengthening the plant's structure.
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