Blueberry

Sun

Full sun for the best fruit crop; tolerates partial shade, especially in hot climates.

Water

Keep the shallow root zone consistently moist but not waterlogged, especially during fruit development. Rainwater is preferable where tap water is alkaline.

Soil

Strongly acidic, humus-rich, well-drained soil, ideally pH 4.5-5.5. Avoid chalk, lime and poorly drained ground.

Height

6-12 ft (1.8-3.7 m)

Spread

6-10 ft (1.8-3 m)

Flowers

Spring to late spring; small, hanging, bell-shaped flowers, white to pale pink.

Foliage

Oval green leaves turn red, orange or purple in autumn; bare stems remain through winter.

Growth

Slow to moderate; usually takes several years to develop a substantial crop.

Care needed

Medium

• Plant at its previous growing depth and keep the root zone free of competing grass.
• Water during dry spells; do not let container compost dry out while berries are swelling.
• Mulch annually with 2-3 in (5-8 cm) of composted pine bark or another lime-free organic mulch, keeping it clear of the stems.
• Feed lightly in spring with a fertiliser labelled for blueberries or acid-loving plants; avoid lime and excessive feeding.
• Plant two different cultivars with overlapping flowering times for more reliable yields; choose cultivars suited to your local winter chill.
• Protect ripening fruit with taut, wildlife-safe netting secured to a frame and closed at ground level.

Pruning. Prune in late winter while dormant, removing dead, damaged and crossing stems. Once established, remove one or two of the oldest canes at ground level each year to encourage vigorous replacement shoots; avoid shearing off the fruit-bearing tips.

Late winter

Prune established bushes, removing old canes selectively and retaining healthy young growth.

Early spring

Apply a light feed for acid-loving plants and renew the mulch.

Spring

Keep flowers accessible to pollinating insects; protect flowering container plants from forecast hard frosts where practical.

Late spring

Check soil moisture regularly as fruit sets, and install a netting frame before berries colour.

Summer

Pick fully blue berries once they release easily; harvest repeatedly as the crop ripens.

Autumn

Plant new bushes while soil is workable and moist, or wait until spring in very cold regions.

• Use as an informal edible hedge, allowing enough width for picking and renewal pruning.
• Plant beside an acidic woodland border with azaleas and ferns for spring flowers and autumn colour.
• Grow a compact cultivar in a large container near a patio, using ericaceous compost and reliable irrigation.
• Include in a mixed edible landscape or food forest, placing it on a sunny edge rather than beneath dense tree shade.

Garden styles it suits: Edible landscape, Potager (kitchen garden), Woodland, Wildlife garden, Food forest and Autumn colour.

Plant it with: Azaleas, Rhododendrons, Japanese pieris, Heathers, Cinnamon fern and Lingonberries.

Wildlife: The flowers feed bumblebees and other pollinating insects. Birds and small mammals eat the berries, and mature bushes provide cover.

• Yellow leaves with green veins usually indicate iron chlorosis from soil or water that is too alkaline: test soil pH, switch to rainwater where possible, and use an ericaceous container if the ground is unsuitable.
• Birds can take most of the crop: enclose bushes in taut, wildlife-safe netting before the berries ripen, and check it regularly.
• Mummy berry disease causes shrivelled fruit and can damage young growth: remove fallen and mummified berries, renew mulch and thin crowded stems.
• Spotted wing drosophila can put larvae in ripening berries: pick frequently, remove spoiled fruit promptly and consider fine insect mesh after flowering.

Not known to be toxic to cats, dogs, horses or people. The ripe berries are edible; leaves, stems and roots are not normally eaten.

Where it spreads. Can escape cultivation and spread into acidic heathland and peatland in northwestern Europe, notably parts of the Netherlands and Germany. Avoid planting beside sensitive bogs or heaths in affected areas and follow local conservation guidance.

• Lowbush blueberry (Vaccinium angustifolium)

  Usually forms low, spreading colonies under 2 ft (0.6 m) tall, with smaller leaves, rather than a tall, upright shrub.

• Bilberry (Vaccinium myrtillus)

  Has green, angular stems and usually solitary berries with dark purple flesh; highbush blueberries bear clusters of berries with pale flesh.

• Rabbiteye blueberry (Vaccinium virgatum)

  Often grows taller and flowers earlier in mild climates; unripe berries commonly turn pink before blue. Cultivated plants and hybrids can be difficult to distinguish reliably without a label.

The common name describes the blue fruit, while the Latin corymbosum refers to its clustered flowers.

Propagation. Take softwood cuttings in late spring or early summer, or hardwood cuttings while dormant, and root in an acidic, free-draining medium. Named cultivars must be propagated vegetatively to retain their characteristics; seedlings vary and take longer to fruit.

Accepted botanical name

Vaccinium corymbosum

In the US and Canada

Native in Canada and the lower 48 states.

Native range

Alabama, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maine, Maryland and Masachusettes.

Measured

Soil pH 4.7 to 7.5. Average height 250 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.