Lonicera edulis, commonly known as blue honeysuckle, sweetberry honeysuckle, fly honeysuckle (blue fly honeysuckle), blue-berried honeysuckle, or honeyberry, is a deciduous shrub native to boreal forests and forest edges in the cool temperate Northern Hemisphere, including regions of China, Japan, and Russia. It typically grows to a height of 1.5–2 m (4 ft 11 in – 6 ft 7 in) and is known for its yellowish-white flowers, which are 12–16 mm long with five equal lobes and produced in pairs on the shoots. The plant’s most notable feature is its edible, blue, somewhat rectangular berries that mature early and are high in vitamin C. The fruiting season coincides with early summer, and the berries are known for their frost tolerance, as is the plant itself, which can withstand temperatures as low as −47 °C (−53 °F).

The blue honeysuckle is valued for its winter hardiness, early fruiting, and the nutritional value of its berries, which are rich in vitamin C and have seeds that are not noticeable when eaten. It is commonly used in edible landscaping and for fruit production, with the berries being harvested in late spring or early summer, just before strawberries for Russian varieties, and at a similar time for Japanese types. Cultivation requires high organic matter, well-drained soils, and plentiful sunlight for optimum productivity. While Lonicera caerulea plants can tolerate wetter conditions than most fruit species, they perform best in full sun to part shade with medium water requirements and soils with medium drainage. The berries are ready to harvest when the inner layer turns dark purple or blue.CC BY-SA 4.0