Salvia × digenea [Bordeau Steel Blue] ('Sagz0002') (Bordeau Series)

RHS Plant Profile

dwarf crimson-flowered sage 'Bordeaux Steel Blue'

Synonyms

Salvia 'Sagz0002', Salvia × digenea 'Sagz0002', Salvia × superba [Bordeau Steel Blue] (Bordeau Series), Salvia nemorosa 'Bordeau Steel Blue', Salvia nemorosa 'Steel Blue' (Bordeau Series), Salvia roemeriana 'Bordeaux Steel Blue'

Herbaceous Perennial

A compact, bushy perennial with green aromatic foliage beneath upright flower spikes, carrying lavender-blue flowers from late spring or early summer through to late summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 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: 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: Trade

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 division in spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Mediterranean climate plants
Patio and container plants
Wildlife gardens
Flower borders and beds

Pruning

Remove flower spikes as they fade by cutting back to the next leaf node to encourage more blooms. Wait until late spring to cut back to new growth after the risk of frost has passed

Pests

May be susceptible to slugs, snails, rosemary beetle and leafhoppers

Diseases

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