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Shrubs

Helianthemum oelandicum subsp. incanum

hoary rock rose

A compact, low growing, broadly spreading sub-shrub with hairy, evergreen leaves. In spring and early summer it produces bright-yellow five-petalled flowers on thin stems.

Other common names

haory-leaved sun rose
slender trailing sun rose

Synonyms

Helianthemum canum
Helianthemum canum subsp. balcanicum

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Ultimate height

Up to 10cm

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Sand

Loam

Moisture

Well–drained

pH

Neutral, Alkaline

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

East–facing or South–facing or West–facing

Exposure

Exposed or Sheltered

Drought resistance

Yes

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: Cistaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Spreading branched
Genus: Helianthemum are bushy or spreading evergreen shrubs with small paired leaves and saucer-shaped flowers borne in short racemes in spring and early summer
Name status: Correct
Plant range: Europe, SW Asia

How to grow

Cultivation

Grow in moderately fertile or poor well-drained neutral to alkaline soil in full sun.

Propagation

Propage by seed using ripe seeds of species in a cold frame in autumn. Propagate by softwood cuttings in late spring or early summer.

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Gravel garden
Banks and slopes
Flower borders and beds

Pruning

Cut back lightly after flowering flowering in mid- to late summer. Prune stems individually rather than shearing over the entire plant.

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

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