Salvia 'Blue Haze' (Pe) | perovskia 'Blue Haze'

Synonyms

Perovskia 'Blue Haze'

Herbaceous Perennial

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A compact, half-hardy perennial to around 60cm in height, with silvery-grey, aromatic foliage. Upright spikes of lavender-blue flowers appear from August to September

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Chalk Loam Sand

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

Position

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): H4

Colour & Scent

Fragrance Flower Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming, Columnar upright
Genus: Salvia can be annuals, biennials, herbaceous or evergreen perennials, or shrubs. They have paired, simple or pinnately lobed, often aromatic leaves and 2-lipped flowers in whorls, forming simple or branched spikes or racemes
Name Status: Unresolved
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: This genus has changed from Perovskia to Salvia

How to Grow

Cultivation

Grow in light, moderately fertile, humus-rich, moist but well-drained soil. Best in full sun but can tolerate light, partial shade

Propagation

Propagate by seed sown at 15-18°C in spring, by division in spring or by semi-ripe cuttings in summer

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Flower borders and beds

Pruning

Cut back to newly emerging shoots in spring. deadhead spent flower spikes to prolong flowering

Pests

Generally pest-free but may be susceptible to slugs, snails and leafhoppers

Diseases

May be susceptible to honey fungus (rarely), Powdery mildews, Verticillium wilt and foot and root rots