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Duke Blueberry
Duke Blueberry
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USDA Zones/Minimum Temperature
USDA Zones/Minimum Temperature
It grows in USDA Hardiness Zones 4-7 and is hardy to temperatures as low as -20°F (-29°C).
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Duke is one of the most popular early-season blueberries in the country — and once you taste the berries, you'll understand why. This northern highbush variety produces large, firm, mild-sweet berries that ripen in late June to early July, weeks ahead of most other varieties. Duke is also celebrated for its exceptional consistency — it produces reliable, heavy crops year after year with very little fuss, making it an outstanding choice for both first-time growers and seasoned gardeners.
🌱 WHAT YOU RECEIVE
• One healthy, well-rooted Duke blueberry plant
• Grown in a 4x2-inch container
• Approx. 6–12 inches tall at shipping
❤️ WHY YOU'LL LOVE IT
• Early ripening (late June–early July) — first berries of the season
• Large, firm, mild-sweet berries with excellent shelf life
• Exceptionally consistent and reliable yields year after year
• Upright, easy-to-maintain form — great for hedges and rows
• Beginner friendly and adaptable to a range of soils
• Cold hardy to -20°F, USDA Zones 4–7
🌿 GROWING INFO
• Zones: 4–7
• Sun: Full sun
• Soil: Acidic, well-draining (pH 4.5–5.5)
• Mature Size: 4–6 ft tall x 4–5 ft wide
📦 SHIPPING
• Ships within 1–2 business days
• Carefully packaged for safe delivery
• Ready to plant upon arrival
Plant Highlight
Plant Highlight
Common name: Duke Blueberry.
Height x Diameter: 4–6 ft x 4–5 ft.
Minimum temperature: Hardy to -20°F.
USDA zones: 4–7.
Light: Full sun.
Uses: Edible landscape, hedge, row planting, backyard orchard, beginner garden.
Deer Resistant: Moderately resistant.
Water: Regular; keep soil consistently moist.
Soil pH: Acidic (4.5–5.5).
Fruit season: Early season (late June–early July).
Pollination: Self-fruitful; cross-pollination increases yield.
Pollination and Ripening
Pollination and Ripening
Duke Blueberry is self-pollinating, meaning you can expect a good fruit set without the need for multiple plants. However, planting more than one blueberry variety can enhance overall fruit production. It typically ripens in mid to late summer, making it a delightful addition to your summer harvest. The plant reaches its full bearing age at around 2 to 3 years after planting.
Shipping Restrictions
Shipping Restrictions
Cannot ship to GA., HI., MI., OR., WA.
Planting Guide
Planting Guide
Planting Guide for Blueberries
Site Selection: Choose a location with full sun (at least 6–8 hours daily) and well-draining, acidic soil with a pH of 4.5–5.5. Blueberries do not tolerate waterlogged roots.
Time of Year to Plant: Plant in early spring or fall when temperatures are cooler. In mild climates, blueberries can be planted year-round.
Spacing: Space blueberry plants 4 to 6 feet apart. Plant multiple varieties nearby for best cross-pollination and fruit production.
Planting: Dig a hole twice as wide and just as deep as the root ball. Mix in peat moss or acidic compost to lower pH if needed. Backfill, firm gently around the roots, and water thoroughly.
Watering: Keep soil consistently moist, especially during the first year and during fruit development. Blueberries have shallow roots and dry out quickly.
Mulching: Apply 2–4 inches of pine bark, wood chips, or pine needle mulch to retain moisture and maintain soil acidity.
Pruning: Prune in late winter or early spring before new growth begins. Remove dead or crossing branches and older canes to encourage productive new growth.
Chill Hours
Chill Hours
Duke blueberries require high chill hours, generally 800–1,000 hours. Proper winter dormancy helps ensure early bloom timing and steady early-season production.
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