Santolina rosmarinifolia subsp. rosmarinifolia

RHS Plant Profile

green lavender cotton

RHS 1999

Other common names

holy flax

Synonyms

Santolina viridis
Santolina virens
Santolina rosmarinifolia virens

Shrubs

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A spreading evergreen shrub to 60cm tall, with finely dissected green leaves and bright yellow flower heads 2cm wide in mid summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Chalk Loam Sand

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

Position

Full sun

Aspect: West–facing or South–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): H5

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Santolina are aromatic, dwarf evergreen shrubs with entire or pinnately dissected leaves and dense, button-like flower-heads in summer
Name Status: Correct
Plant Range: Spain, Portugal

How to Grow

Cultivation

Easy to grow evergreen sub-shrub that thrives in hot, sunny, well-drained sites. Useful as a dwarf-hedging substitute although they can be short-lived

Propagation

Propagate by semi-ripe cuttings with bottom heat in late-summer

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Gravel garden
Patio and container plants
Rock garden
Coastal
Flower borders and beds
Hedging and screens
Garden edging

Pruning

Pruning group 10. Trim back after flowering to maintain a dense, compact shrub

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