Blueberry ‘Duke’

Blueberry 'Duke'

Blueberry ‘Duke’ is a highly productive Northern highbush variety celebrated for its early ripening, cold hardiness, and consistent yields. It produces medium to large berries with a mildly sweet, slightly tangy flavor that holds up well during harvesting and storage. The berries are firm, making them perfect for fresh snacking, freezing, or baking.

‘Duke’ blooms late—avoiding spring frosts—but ripens early, usually by late spring or early summer. This makes it an excellent choice for growers in colder regions (USDA zones 4–7) who want a dependable, early harvest. The upright, vigorous shrub reaches 4–6 feet tall at maturity and features attractive foliage that turns yellow-orange in fall, adding ornamental value to edible landscapes.

Though ‘Duke’ is self-pollinating, planting it near other Northern highbush varieties can improve berry size and yield. Its reliable performance and cold tolerance make it a favorite among home gardeners and commercial growers alike.

Care Instructions

Planting:

Plant in early spring in full sun. Space 4–5 feet apart in well-drained, acidic soil. Ideal for zones 4–7.

Watering:

Keep soil evenly moist but not soggy. Water more frequently during dry periods and fruit development.

Pruning:

Prune annually in late winter to remove older canes and promote new growth. Thin the center for airflow.

Pest Control:

Protect from birds with netting. Watch for aphids and mites; treat with insecticidal soap or neem oil if needed.

Soil Tips:

Requires acidic soil (pH 4.5–5.5). Improve with peat moss or pine bark. Mulch to retain moisture and reduce weeds.