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Photo: Amédée Masclef, Public domain (via Wikimedia Commons)

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Bilberry

Vaccinium myrtillus

Also known as European Blueberry, Whortleberry, Blaeberry, Fraughan

At a glance
Family
Ericaceae (heath family)
Type
Deciduous woody shrub
Parts used
Ripe berries (fresh or dried); leaves used sparingly in traditional folk practice
Size
4 to 20 inches tall, low and spreading
Bloom
April to June, small greenish-pink bell-shaped flowers
Habitat
Acidic, peaty soils on moorland, heath, and in open coniferous woods across Europe
Acquisition
Forage or buy
This plant in HerbSense

Key benefits

Traditionally supports circulation
Historically used for eyesight
Traditionally eases mild diarrhea
Rich in antioxidant pigments

Traditional uses

Bilberry has been gathered from European hillsides and hedgerows for centuries, its juice so deeply pigmented that foragers finish a harvest with stained hands and lips. Folk herbalists dried the ripe berries and simmered them into a thick decoction for digestive upset, especially mild diarrhea, a use later borne out by the fruit's natural tannins. Across Scandinavia, the Alps, and the British Isles, bilberry jam and cordial were kitchen staples long before the berry was studied for its role in circulation and eye comfort. It has also traditionally been used to support the small blood vessels of the eyes and legs, a use tied closely to its deep anthocyanin color.

Growing guide

Sun
Partial shade to dappled woodland light suits it best, though it tolerates more sun in cooler climates
Soil
Acidic, humus-rich, well-drained soil, similar to what rhododendrons and heathers prefer
Water
Steady, even moisture; it struggles in drought and dislikes waterlogged roots equally
Planting
Set out young potted plants in autumn or spring, ideally into soil already populated with the mycorrhizal fungi bilberry depends on; it spreads slowly by underground rhizomes once established

Fresh to dried

Harvest
Pick ripe berries by hand in mid to late summer, once they turn a deep blue-black and come away easily from the stem
Drying
Spread berries in a single layer on screens in a cool, airy spot, or dry gently in a low oven, turning occasionally until shriveled and firm
Storage
Keep fully dried berries in an airtight jar away from light and heat, where they will hold their color and use for up to a year
Best forms
Dried whole berries for tea and decoctions, fresh berries for eating and preserves, syrups and extracts for a more concentrated traditional preparation

Traditional preparations

Featured preparation

Dried Bilberry Decoction

A traditional preparation reached for during occasional mild digestive upset or looseness of the stool.

How it's made. Lightly crush 1 to 2 teaspoons of dried bilberries and simmer in 250 ml of water for 10 to 15 minutes. Strain and drink, up to two or three times a day as needed.

Secondary preparation

Bilberry Syrup

A simple sweetened preparation used traditionally as a soothing, antioxidant-rich tonic and a way to preserve the berry's benefits beyond harvest season.

How it's made. Simmer 1 cup of fresh or dried bilberries in 1 cup of water until softened, strain, and stir the warm liquid with an equal part honey. Take by the spoonful.

Pairs well with
  • Hawthorn
  • Eyebright
  • Rosehip
Substitutes
  • Elderberry
  • American Blueberry (Vaccinium corymbosum)
Choose it when

For the deep-violet hedgerow berry that folk herbalists trusted, season after season, to steady the gut and support tired eyes and hardworking circulation.

Did you know?

During World War II, British Royal Air Force pilots claimed that eating bilberry jam sharpened their night vision before flights, a story many historians now believe was wartime cover for the newly developed radar technology.

Safety

Bilberry fruit is safe as food, though it may lower blood sugar and affect platelet function, so use caution alongside diabetes medication or blood thinners like warfarin or aspirin. The leaves, taken in large amounts or long term, have been linked to toxicity and are best avoided as a regular tea.