Helleborus foetidus aka Stinking Hellebore

Helleborus foetidus, or stinking hellebore, belongs to the buttercup family. Its native range spans western Europe, central Germany, and southern Italy. It also grows wild in northern Morocco. It lives in woods, thickets, and banks on chalk or limestone. This evergreen perennial forms upright clumps and keeps its leaves through winter. Plants may live for four to five years.

Most garden plants reach 1–2 feet [0.3–0.6 metres] tall. Their spread is about 1–1.5 feet [0.3–0.46 metres]. RHS gives a broader height range, reaching 3.3 feet [1 metre]. The stout stems may be green or purple. Dark green, leathery leaves grow at the base and along stems. Each leaf divides into seven to ten narrow, toothed segments. Some leaves span over 0.67 feet [0.2 metres]. Crushed leaves give off an unpleasant smell. The whole plant does not smell bad when left undisturbed.

Flower clusters rise above the leaves from February to April. The nodding bells range from pale green to greenish white. Many have purple edges, with pale green bracts below them. The flowers can also have a slight, unpleasant scent. Honeybees visit them for food and help pollinate them. Green, fleshy seed capsules follow the flowers. These form clusters with long beaks and lasting sepals. Plants can spread by seed once they settle into a garden. Seed-grown plants take about two years to flower.

Partial shade suits this plant best, though it accepts deeper shade. RHS also lists full sun as an option. NC State warns against strong winter sun and high heat. Choose moist, fertile soil that drains well and contains organic matter. Neutral to alkaline soil suits it. Established plants can cope with drought. Shelter helps protect them from cold winter winds. Sources list USDA zones 5–9, though survival in zone 5 can vary. RHS rates it H7. Use it in shady borders, woodland gardens, or containers near patios. Groups can form evergreen ground cover beneath trees or shrubs.

Care needs are low, and deer and rabbits tend to avoid it. Remove spent flower stems to encourage fresh growth. Remove damaged leaves as flowers emerge. Aphids, leaf miners, and snails may attack plants. Crown rot, leaf spot, and hellebore black death can occur. Black death may cause black streaks and distorted growth. Remove and destroy plants with this disease. All parts are poisonous, and no edible uses are known. Eating it can harm people, dogs, cats, and horses. Contact can irritate skin, so wear gloves and protective clothing.