Bryonia alba (white bryony)

White bryony is native to Europe and western Asia. All parts of the white bryony are poisonous, especially the roots. The plant grows fast, with climbing tendrils, and can reach up to four meters in height. The species is perennial and flowers from May to June with small white or greenish-white flowers. White bryony was historically used to treat kidney stone since the plant is highly diuretic.

This plant is monoecious at northern latitudes, meaning individual flowers are either male or female but found on the same plant. White bryony is beepollinated and can grow in semi-shade or shade and neutral or slightly alkaline, moist but well drained soils.

The seeds are best sown as soon as they are ripe, or in late winter in a cold frame or a tray outdoors. The seeds might need a cold period to germinate. Initially sow the seeds in tray substrate and cover the seeds slightly. When large enough to handle transplant the plants into small individual pots in pot substrate.

The pots can be placed in an unheated greenhouse, or outside when the risk of frost is over. When fully rooted in the pots, plant outside in field. The vine produces a berry fruit, initially green, that blackens when it ripens. Always harvest in dry conditions. Seed harvest will probably be obtained August/September during the second year of cultivation. Harvest the berries when they are fully black.