Helenium 'Zimbelstern'

RHS Plant Profile

sneezeweed 'Zimbelstern'

Synonyms

Helenium hoopesii 'Zimbelstern'

Herbaceous Perennial

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A clump-forming, herbaceous perennial with lance-shaped, mid-green leaves. In summer and autumn it produces large, single, golden-yellow flowers lightly suffused with red on branched stems. The notched petals are arranged around a central boss of dark-red/brown stamens.

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 1–2 years
Max Spread: 0.1-0.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: East–facing or South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Helenium may be upright, clump-forming annuals, biennials or herbaceous perennials with simple leaves and showy daisy-like flower-heads over a long period
Name Status: Accepted

How to Grow

Cultivation

Grow in any fertile, moist but well-drained soil in full sun.

Propagation

Propagate by seed, or root basal softwood cuttings in a cold frame in spring. Propagate by division in spring.

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Prairie planting
Wildlife gardens
Cut flowers
Flower borders and beds

Pruning

No pruning required. Cut back flower stems in winter or early spring.

Pests

Generally pest-free

Diseases

May be susceptible to leaf spot