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Bog bilberry

Vaccinium uliginosum · Ericaceae

The gardener's calendar

The right move for September

In autumn, ease off feeding and take the chance to clean up around bog bilberry and prepare for winter.

JFMAMJJASOND Planting

ID card

Foliage
Deciduous
Flowering
Spring (April-May)
Adult size
0.5 to 1.5 m in height
Growth
Slow to moderate
Hardiness
Very hardy (down to -40°C)
Origin
Temperate and arctic regions of the North (Eurasia, North America)
Soil type
Acidic, peaty, well-draining

Care

Light exposure

Plant your bog bilberry in full sun or partial shade for optimal fruiting. It tolerates varying light conditions but produces more fruit in sunny exposure. Protect it from overly harsh drying winds.

Soil and substrate

Choose acidic soil (pH 4.5 to 5.5), rich in organic matter and consistently moist but well-draining. Improve your soil with peat, acidic compost, or pine bark. Absolutely avoid chalky or overly compact soils.

Watering

Keep the soil consistently moist during growth and fruiting, especially in summer. Reduce watering slightly in winter but never let the soil dry out completely. If possible, use non-chalky or rainwater.

Fertilizing

Apply a balanced acidic fertilizer in spring, or use a slow-release amendment (crushed horn, leaf compost). Bilberries have modest nutrient needs; excess nitrogen reduces fruiting in favor of foliage.

Pruning and maintenance

Prune lightly after flowering to maintain a compact shape and encourage branching. Remove dead or diseased branches in late winter. Avoid drastic pruning that compromises your harvest.

Diseases and pests

This hardy species is rarely affected by disease under appropriate conditions. Watch for powdery mildew in humid, overly warm weather; ensure good air circulation. Insect attacks remain rare if the plant is well established.

Did you know?

The bog bilberry is an arctic and boreal plant that ranges from the peatlands of Scandinavia to Siberia and North America. It has long been an essential food source for northern peoples, both for its nutritious berries and traditional properties. Its remarkable ability to adapt to acidic and wet soils makes it a valuable ally for restoring degraded areas or creating ecological gardens in cold regions.

Where to buy it

Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.

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Tips generated and checked by Viridia — adapt them to your local climate.