Helianthemum 'Lemon Queen'

RHS Plant Profile

rockrose 'Lemon Queen'

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Synonyms

Helianthemum nummularium 'Lemon Queen'

Shrubs Alpine Rockery

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A low-growing, spreading evergreen shrub with narrow green leaves. Soft lemon yellow flowers are produced from late spring to early summer, fading to cream as they mature

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.5-1 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: 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): H4
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Cistaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy, 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: Accepted

How to Grow

Cultivation

Grow in moderately fertile, neutral to alkaline, well-drained soil in full sun. Will not tolerate waterlogging. May benefit from protection in cold winters

Propagation

Propagate by softwood cuttings in late spring or early summer

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Gravel garden
Rock garden
Banks and slopes
Flower borders and beds
Ground cover

Pruning

Pruning group 10, after flowering

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