Blueberry Bush (Duke)

📖 About This Plant

Blueberry Bush (Duke) is one of the premier early-season Northern Highbush blueberry varieties — a reliable, vigorous cultivar producing very large, firm, mild-sweet berries that ripen ahead of most other varieties in late June. Growing 4–6 feet tall in zones 4–7, Duke is exceptionally cold-hardy (surviving –20°F) and produces heavy, consistent yields even in cool summers. Its upright, compact habit makes it easier to net than sprawling varieties. Duke is self-fruitful but produces significantly larger crops when cross-pollinated with another variety (Bluecray, Patriot, or Bluejay are ideal companions). The berries hold well on the bush and in storage — firm-fleshed and crack-resistant even in wet weather.

📊 Quick Facts

📅 When to Plant in Your Area

🌱 Care Tips

Plant Duke blueberry in full sun in very acidic soil (pH 4.5–5.0) amended with peat moss, acidic compost, or pine bark — this is non-negotiable; blueberries will not thrive in standard garden soil. Test and amend soil 6–12 months before planting. Space plants 4–5 feet apart. Water consistently with 1–2 inches per week; blueberries are shallow-rooted and drought-sensitive. Mulch deeply with wood chips or pine needles to retain moisture and maintain acidity. Fertilize with an acid-specific fertilizer (ammonium sulfate) in spring. Plant two or more compatible varieties for cross-pollination and larger yields. Prune out the oldest, darkest canes at the base each late winter to encourage vigorous new growth. Net plants just before berries ripen — birds can strip a bush in hours.

🤝 Companion Plants

These plants grow well alongside Blueberry Bush:

🌿 Related Tree

More tree that grow in similar conditions:

❓ Frequently Asked Questions