Plant encyclopedia›autumn sneezeweed

autumn sneezeweed

Also known as: autumn Helen flower; autumn sneezewort; dog fennel; smooth Helen flower; swamp sunflower; yellow star; ox eye; sneezeweed

An upright, clump-forming perennial up to 1.5m or more high, with branched stems and ovate to lance-shaped green leaves, 10-15cm long, and flowers 5-7cm across with dark brown discs (yellow in the wild) surrounded by bright yellow rays, which bend downwards as the disc-florets open, from late summer to autumn; the flowers provide pollen for bees and nectar for bees and other insects

Scientific classification

Species: autumn sneezeweed (Helenium autumnale)
Genus: Helenium
Family: Asteraceae

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Toxicity: Herbaceous Perennial
Plant type: 1-1.5 metres
Height: 0.1-0.5 metres
Spread: Deciduous
Foliage: Clump forming
Habit: Spring · Summer · Autumn
Season of interest: Full sun
Sunlight: 15 – 25 °C
Ideal temperature

autumn sneezeweed pictures

Distribution of autumn sneezeweed

Distribution map

Americas

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Culture

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Toxicity

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Quick identification of autumn sneezeweed

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autumn sneezeweed care guide

Moderate regular watering, allowing brief slight drying between soakings
Watering: Full sun
Sunlight: 15 – 25 °C
Ideal temperature

Watering

Moderate regular watering, allowing brief slight drying between soakings

Fertilizing

Balanced perennial feed every four weeks from spring through summer

Pruning

No pruning required, but deadheading will prolong flowering

Propagation

Propagate by seed in spring, by division in autumn or spring, or by basal softwood cuttings in containers in a cold frame in spring

Growing

Grow in full sun in fertile, moisture-retentive, humus-rich soil, and provide support for the tall stems; divide every two to three years to maintain vigour

More growing and care information →