Salvia × sylvestris 'Mainacht'

RHS Plant Profile

wood sage 'Mainacht'

Synonyms

Salvia nemorosa 'Mai Nacht'
Salvia nemorosa 'May Night'
Salvia sylvestris 'May Night'
Salvia × sylvestris May Night
Salvia × superba May Night

Herbaceous Perennial

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A compact perennial with neat, dark green foliage and dense racemes of deep violet flowers in early 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
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing
Exposure: Exposed or 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): H6

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
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: Accepted

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

Wildlife gardens
Mediterranean climate plants
Flower borders and beds

Pruning

Remove flower spikes as they fade to prolong flowering

Pests

May be susceptible to sage leafhopper, slugs, snails and rosemary beetle

Diseases

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