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Shrubs

Helichrysum thianschanicum 'White Wonder'

silver spike 'White Wonder'

An upright, mound-forming tender evergreen sometimes grown as an annual with aromatic silver-grey leaves. Clusters of dense yellow flower heads are produced in summer

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

East–facing or South–facing or West–facing

Exposure

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)

Botanical details

Family: Asteraceae
Native to the UK: No
Foliage: Semi evergreen
Habit: Bushy
Genus: Helichrysum can be annuals, herbaceous or evergreen perennials or shrubs, usually with grey-hairy foliage and papery everlasting flower-heads
Name status: Unresolved

How to grow

Cultivation

Grow in well drained, poor to moderately fertile neutral to alkaline soil in full sun. Will need winter protection from the cold and wet

Propagation

Propagate by semi-ripe cuttings in summer

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Patio and container plants
Low Maintenance
Flower borders and beds

Pruning

Pruning group 10. Prune in early spring, do not cut back into old wood.

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus in gardens where it is present but insufficient data to determine degree of susceptibility. May also be susceptible to downy mildews and powdery mildews

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