Northern Highbush
Duke Blueberry is an early-season Northern Highbush variety developed by the USDA in Beltsville, Maryland, and released to gardeners in 1987. It grows as a compact shrub reaching 6 feet tall and 4 to 6 feet wide, thriving in hardiness zones 4 through 8. The plant produces large, firm berries with a tangy-sweet flavor starting around 2 to 3 years after planting, and continues bearing fruit generously for at least a decade. Plant it in full sun with acidic soil (pH 4.5 to 5.5), and you'll have a landscape shrub that delivers spring flowers, summer fruit, and striking autumn color.
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Full Sun
Low
4-8
72in H x 72in W
Perennial
Moderate
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Duke earned its reputation as an early-season workhorse by combining large, firm berries with exceptional productivity and cold hardiness. The fruit has a distinctive tangy-sweet flavor with a crisp texture that holds up beautifully whether you're eating fresh, canning, or freezing. Developed specifically for northern gardens, it handles cooler climates better than many blueberry varieties and produces 5 to 10 pounds of fruit annually once established. The plant itself is ornamental year-round, offering white spring flowers, colorful summer berries, and excellent fall foliage that makes it as attractive in the landscape as it is generous at harvest.
Duke Blueberries excel fresh off the bush, delivering a tangy-sweet berry that's equally at home on the breakfast table as in a dessert. Their firm, crisp texture and excellent flavor make them superior candidates for canning and freezing, holding their shape and taste through processing better than softer varieties. You can also enjoy them as a beautiful landscape shrub, combining spring white flowers with summer fruit production and striking autumn foliage.
Transplant Duke Blueberry plants in early spring, around the beginning of March, according to your hardiness zone. Space plants 4 feet apart and ensure the soil has been tested and amended to the proper acidic pH (4.5 to 5.5) before planting. Plant in full sun with moist, well-draining soil.
Begin harvesting Duke Blueberries in the 2nd or preferably 3rd year of growth, with berries ripening from late June through late August. Harvest regularly throughout the season as berries mature; they are ready when completely blue and feel slightly springy when squeezed gently. Fruit ripens over several weeks, so plan on multiple harvests to capture berries at peak ripeness. Refrigerate berries shortly after harvest, and do not wash them until you're ready to eat or process them.
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“Duke Blueberry emerged from deliberate breeding work at the USDA's horticultural research station in Beltsville, Maryland, where plant scientists focused on creating blueberry varieties suited to northern growing regions. Released to the public in 1987, Duke represented a significant breakthrough for gardeners in colder climates who wanted reliable, high-yielding blueberries. The variety was specifically developed to be an early-season producer with the firm texture and cold tolerance that northern gardens demanded, making quality blueberry cultivation accessible far beyond traditional growing regions.”