Lonicera caerulea (Blue-berried Honeysuckle or Sweetberry Honeysuckle) is a honeysuckle native throughout the cool temperate Northern Hemisphere.
It is a deciduous shrub growing to 1.5-2 m tall. The leaves are opposite, oval, 3-8 cm long and 1-3 cm broad, glaucous green, with a slightly waxy texture. The flowers are yellowish-white, 12-16 mm long, with five equal lobes; they are produced in pairs on the shoots. The fruit is a blue berry about 1 cm diameter.
Propagation of Lonicera caerulea:
Stored seed requires 2 months cold stratification and should be sown as soon as possible in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Cuttings of half-ripe wood, 7 - 10cm with or without a heel, July/August in a frame. Good percentage. Cuttings of mature wood of the current season's growth, 15 - 20cm with or without a heel, November in a cold frame. Good percentage. Layering in autumn.