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ShrubsConservatory Greenhouse

Lavandula × christiana

A tender, evergreen shrub about 75cm high and wide, and aromatic, serrated, silvery grey-green leaves, and branched flowering stems 30-60cm long topped by slender spikes 4-10cm long of large, fragrant, lavender-violet flowers with darker violet-blue calyces in summer, and intermittenly through the year

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Sand

Chalk

Loam

Moisture

Well–drained

pH

Neutral, Alkaline, Acid

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

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)

H1C

Botanical details

Family: Lamiaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Lavandula are small aromatic evergreen shrubs with usually narrow, simple, entire, toothed or lobed leaves and small tubular flowers in dense spikes in summer
Name status: Correct

How to grow

Cultivation

In frost-free climates, grow in full sun in well-drained soil; in frost-prone areas grow in containers outside during summer but move under glass and keep at above 5C in cold weather; for more advice, see lavender cultivation

Propagation

Propagate by semi-ripe cuttings in late summer, or by softwood cuttings of new growth in early summer

Suggested planting locations and garden types

Patio and container plants
Coastal
Mediterranean climate plants
Cottage and informal garden
City and courtyard gardens
Sub-tropical
Conservatory and greenhouse
Cut flowers

Pruning

Pruning group 10, in early spring or mid-spring

Pests

May be susceptible to rosemary beetle, and to cuckoo spit (froghopper or spittle bug nymphs)

Diseases

May be susceptible to grey moulds (Botrytis) and honey fungus (rarely)

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