Lithodora zahnii 'Azure-ness'

RHS Plant Profile

gromwell 'Azure-ness'

RHS

Shrubs Alpine Rockery

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A many-branched, spreadingshrub to around 30cm in height with stems covered in hairy, narrowly-oval, dark grey-green leaves. Funnel-shaped blue flowers open in succession from pink buds throughout the summer and intermittently in the autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1-1.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Exposed
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

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Boraginaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Lithodora are evergreen shrubs or sub-shrubs, with 5-lobed blue or white flowers in early spring to summer
Name Status: Accepted

How to Grow

Cultivation

Grow in well-drained, preferably alkaline to neutral soil in full sun

Propagation

Propagate by semi-ripe cuttings in summer

Suggested planting locations and garden types

Coastal
Gravel garden
Rock garden
City and courtyard gardens
Cottage and informal garden
Patio and container plants
Banks and slopes
Flower borders and beds

Pruning

Pruning group 8; or 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