Bog Blueberry

Vaccinium uliginosum

Ericaceae · broadleaf deciduous shrub · native

Last updated March 9, 2026

Data Coverage 3 of 6 dimensions

Site Data

Threats

Cultivars

Phenology

GDD Thresholds

Puget Sound

Bog blueberry (bog bilberry) is a native broadleaf shrub reaching 2 ft with multiple stems and semi-erect form. It produces urn-shaped white to pink flowers and blue edible berries with dark green foliage.

Bog blueberry is hardy in zones 2a-8b and thrives in sun to part shade with well-drained, acidic soil (pH 4.5-5.7) and moderate moisture. Growth is moderate with low drought tolerance, suiting it to naturally moist conditions. Large quantities of fruit may cause headaches due to fungal infestation.

Quick Facts

Height

2 ft

Growth Rate

Moderate

Light

Sun to Part Shade

Soil

Well Drained

Water

Moderate

Hardiness

Zone Zones 2a–8b

Bloom Time

Jun 1-Jun 30

Origin

Pacific Northwest native

Phenological Calendar

Stage	Typical Window	What to Look For
Bud break BBCH 07	Feb 15-Mar 15	Buds swelling and beginning to open; first green tissue visible
Leaf emergence BBCH 11	Mar 1-Apr 1	First leaves fully unfurled on new growth
Bloom start BBCH 61	Jun 1-Jun 30	First open flowers visible; flowers purple
Bloom end / petal fall BBCH 69	Jun 15-Jul 15	Last petals falling; flower structures fading
Fruit/seed development BBCH 71	Jun 1-Aug 31	Fruit or seed structures forming; fruit color: blue
Leaf drop BBCH 93	Oct 15-Nov 30	Leaves yellowing and dropping; no significant fall color display
Dormancy BBCH 97	Nov 15-Feb 28	Leafless; no active growth; dormant buds set

Diseases (42)

Alternaria spp Alternaria Fruit Rot Armillaria ostoyae Armillaria Root Rot Pseudomonas syringae pv. syringae Bacterial Canker Botrytis cinerea Botrytis Blight Abiotic Chemical Injury Rhizobium radiobacter (formerly Agrobacterium tumefaciens) Crown Gall Godronia cassandrae Fusicoccum Canker (Godronia Canker) Non-pathogenic (abiotic — soil pH imbalance) Incorrect soil pH Monilinia vaccinii-corymbosi Mummy Berry Xiphinema americanum Nematode, Dagger Pratylenchus penetrans Nematode, Root-lesion Paratrichodorus renifer Nematode, Stubby-root Colletotrichum spp. Ripe Rot (Anthracnose) Symptom category — not a single disease Root Rot Thekopsora minima and Naohidemyces vaccinii Rust The blueberry Scorch The blueberry Shock Chondrostereum purpureum Silver Leaf Botryosphaeria corticis Stem Canker Diaporthe vaccinii Twig Blight Sporocadus lichenicola Twig Canker Verticillium dahliae Verticillium Wilt Blueberry mosaic virus and related viruses Virus Diseases Gymnosporangium juniperi-virginianae or similar Witches' Broom Rust Botryosphaeria spp. Botryosphaeria Fruit Rot and Berry Speckle Abiotic (symptom) Cottonball Phyllosticta cotoneastri (primary); Entomosporium maculat... Early Leaf Spot Cranberry false blossom virus False Blossom Phytophthora cactorum Fruit Rot Nematodes are Nematodes Phytophthora spp. Phytophthora Root and Runner Rot Pyrenobotrys compacta Pyrenobotrys Leaf Spot Phyllosticta cotoneastri Red Leaf Spot Phytophthora spp. or environmental Red Shoot Environmental/nutritional disorder Rose Bloom Diaporthe vaccinii (asexual: Phomopsis vaccinii) Upright Dieback Raspberry bushy dwarf virus and related viruses Virus Abiotic or fungal Leaf Gall Symptom category — not a single disease Leaf Spot Phytophthora ramorum"filthy five\" genera are inc Ramorum Leaf Blight and Shoot Dieback Three viruses generally considered as \"latent\" in apple... Diseases Diaporthe vaccinii (asexual Phomopsis vaccinii) Leaf Spots and Twig Blights