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Entire healthy mature blueberry plant in a real garden bed, showing growth habit and scale.Primary identification image. 90–180 cm tall, 90–150 cm wide at maturity.

Blueberry

Vaccinium corymbosum L.

Also called: Highbush blueberry

Family
Ericaceae
Season
Perennial hardy perennial shrub
Best grown in
Portland, Oregon

A long-lived shrub that needs acid soil (pH 4.5–5.5); in most gardens that means a dedicated bed or a large pot of ericaceous compost.

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Life cycle & growth stages

  1. 1. ShrubPlant in acid soil or ericaceous compost.
  2. 2. EstablishmentRemove flowers in the first year.
  3. 3. FloweringBell-shaped flowers in spring; bees pollinate.
  4. 4. Developing fruitGreen berries colour over 2–3 weeks.
  5. 5. HarvestPick over several weeks; net against birds.
  6. 6. PruningRemove oldest stems in winter from year 4.

Growth stages are ordered chronologically; timing varies with cultivar, temperature, light and care.

Planting calendar for Portland, Oregon

transplant 4 weeks before to 2 weeks after last frost; 730–1095 days to maturity from planting. Windows are derived from the region's average frost dates (last Apr 5, first Nov 5) and are estimates until you confirm your own dates in the calendar.

BlueberryVaccinium corymbosum
PlantStart indoorsDirect sowAutumn sowTransplantTendHarvest
Blueberry——Sep 10–Oct 8 (estimate)Mar 8–Apr 19 (estimate)Apr 19–Mar 8 (estimate)Mar 8–May 17 (estimate)
  • Transplant outdoors: Mar 8 – Apr 19
  • Tend and monitor: Apr 19 – Mar 8
  • Autumn sowing: Sep 10 – Oct 8
  • Harvest: Mar 8 – May 17

Spacing & support

In-row 120–150 cm; rows 240–240 cm. Planner footprint: 9 cells of 30 cm.

Side-profile diagram of mature blueberry: canopy 90–180 cm tall, 90–150 cm wide, shallow root zone, support and harvest-access envelope.

Soil & water

Soil
Acid, organic, moist, well-drained soil
pH
4.5–5.5
Fertility
low
Water
Constant moisture with rainwater; shallow roots dry fast.
Frost
very hardy; tolerates frost

Support & training

No support structure needed.

Blueberry mid-season before harvest, showing branching, vining, rosette or upright habit and space occupied.

Harvest signs

  • Berries fully blue with a dusty bloom for several days
  • Roll off the cluster with light pressure
Blueberry at harvest readiness, showing the visual cues: berries fully blue with a dusty bloom for several days; roll off the cluster with light pressure.

Common problems

Pests: birds, spotted wing drosophila, vine weevil

Diseases: mummy berry, Botrytis

Appearance alone is not a diagnosis; confirm with a regional extension guide.

Side-by-side: healthy blueberry leaf or fruit and an example of mummy berry.

Container growing

  • Minimum 40 L (40 cm deep)
  • Use quality potting mix and water more frequently
  • Ericaceous compost; rainwater only.
Mature blueberry in a correctly sized container (40 L or more) with drainage visible.

Companion overview

1 reviewed relationship record (evidence: low).

Supported or conditional

None reviewed

Avoid or separate

None with evidence

1 popular pairing reviewed with no verified relationship.

Full companion profile

Crop rotation

Blueberry is a permanent planting; rotation does not apply, but do not replant it where a related crop failed from soil disease.

Crop rotation hub

Sources, reviewer & update

Sources

Reviewer: Garden Planner editorial team (pending independent horticultural review)

Last reviewed: August 15, 2026 · version 1

Found an error or have feedback? Let us know.

Growing blueberry

Blueberries are planted as 2–3-year-old shrubs in spring or autumn into acid, moist, well-drained soil; in neutral or alkaline gardens they fail, so grow them in 40 L pots of ericaceous compost watered with rainwater. Plant two cultivars for cross-pollination and larger crops.

Blueberry planting material (crown, set, clove, slip or tuber) beside a ruler or coin for scale.
Blueberry seedling at cotyledon and first-true-leaf stage, in soil, distinguishable from common weeds.
Blueberry mid-season before harvest, showing branching, vining, rosette or upright habit and space occupied.

Shrubs reach 1–1.8 m, fruit from the third year and need netting against birds. Their soil needs are incompatible with almost every vegetable, which the planner reports as a fertility/soil conflict rather than a companion issue.

Two or more mature blueberry plants with a tape measure showing in-row spacing (120–150 cm).
Blueberry flower detail or bolting stage.
Immature fruit of blueberry developing on the plant.

Edible parts and safety

Edible: fruit.

Hands or tool harvesting blueberry correctly (cut, pull, twist or pick) without damaging the plant.

Pests and diseases

Common pests: birds, spotted wing drosophila, vine weevil. Common diseases: mummy berry, Botrytis. These vary by region; a photograph is an example, not a diagnosis. See the pest and disease guides and your local extension service.

birds on blueberry, with a wider damage-context view.

Timeline

Season timeline for blueberry: sowing, transplanting, flowering, harvest and bed occupancy aligned to frost dates.Text alternative: Transplant outdoors Mar 8–Apr 19; Tend and monitor Apr 19–Mar 8; Autumn sowing Sep 10–Oct 8; Harvest Mar 8–May 17.

Related plants

See also: Ericaceae family page · crop rotation · regional calendar · guides

Our Methodology & Sources

We synthesize peer-reviewed research, university extension publications, and trusted horticulture resources. Our evidence levels help you understand how strong the science is behind the guidance.

Evidence tiers

Supported evidenceConsistent results from multiple robust studies
Traditional claimHistorical use reported, limited scientific support
Context dependentMixed or variable results across conditions
No verified relationshipNo reliable evidence identified

Primary source types

  • Peer-reviewed journal articles
  • University extension publications
  • Government & research institute reports
  • Systematic reviews & meta-analyses

Last updated

August 24, 2026

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