About
Hyoscyamus niger, henbane, is a branching, hairy, highly poisonous biennial to around 80 cm producing coarsely toothed, softly hairy, grey-green leaves and funnel-shaped, creamy-yellow flowers with purple veining and a dark-purple centre in summer. Historically important as a medicinal and narcotic plant, and an atmospheric addition to a poison or apothecary garden.
About the genus
Hyoscyamus, the henbanes, are annuals, biennials and short-lived perennials with hairy, often sticky foliage and funnel-shaped flowers in yellow, cream or white, usually veined with purple. All parts are highly toxic. Grown as botanical or historical curiosities.
Growing conditions
SunlightFull sun, Partial shade
Soil typeChalk, Clay, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectNorth-facing, East-facing, South-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH3
Plant details
Plant typeAlpine Rockery, Shrubs
HabitBushy
FoliageEvergreen
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height5-10 years
Suggested usesCity and courtyard gardens, Coastal, Cottage and informal garden, Gravel garden, Patio and container plants, Rock garden
Native toMediterranean
ToxicityFruit are ornamental - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Fruit are ornamental - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Care notes
CultivationGrows well in moist but well-drained soil in sun or partial shade
PruningPruning group 8
PropagationPropagate by seed in autumn or by softwood cuttings in summer
Pest resistanceGenerally pest-free
Disease resistanceMay be susceptible to a rust and honey fungus (rarely)