
Photo by Linda Lötjönen on iNaturalist · CC BY 4.0
Vaccinium myrtillus
The inside. A bilberry is purple-red all the way through and stains everything; a cultivated blueberry has pale flesh. Bilberries also grow one per stalk on a knee-high wild shrub, where blueberries hang in clusters on tall bushes.
July to September. They start in July in the lowlands and southern Britain and run into August and September in Scandinavia and the mountains.
On acid, nutrient-poor soil: pine, spruce, birch and oak woods, heath and moorland, often carpeting the ground in dappled shade.
To pick only from the low shrub with green, angled stems, and to bring you any other black berry first. Deadly nightshade has shiny black berries of a similar size, but they grow singly on a branching herb up to 1.5 m (5 ft) tall and sit in a green five-pointed star; a few can kill a child. Herb Paris holds a single blue-black berry above four leaves.
Found in these regions
Hardiness zones 3–7.
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Also ready in October

Castanea sativa
A big tree with long, glossy leaves edged with sharp, regular teeth, and bark that twists in spiralling ridges on old trunks. The nuts come in twos and threes inside a husk covered in dense, needle-sharp spines; each is glossy brown, flat on one side, with a pointed tuft at the tip.
How to know it & its look-alikes →Photo: John Powers · CC BY 4.0

Sorbus aucuparia
A slim tree with smooth silvery-grey bark and feathery leaves of many toothed leaflets in pairs; big flat clusters of scarlet-orange berries, each about 1 cm (⅜ in) across with a tiny black five-pointed star at the tip.
How to know it & its look-alikes →Photo: Therese Phillips · CC BY 4.0

Hippophae rhamnoides
A thorny shrub with narrow, silvery-grey, willow-like leaves and branches packed with bright orange berries 6–8 mm (¼ in) across, from late summer into winter. Only female bushes fruit.
How to know it & its look-alikes →Checked against these sources ·
Seasons are typical for the middle of the range and move by weeks north and south, and up and down hills.
Educational information only. Never eat a wild plant or mushroom identified from a single photograph or description — confirm with a regional field guide or an experienced forager, and know the poisonous species in your area first.