Salvia lyrata 'Purple Knockout'

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lyre-leaf sage 'Purple Knockout'

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lyre-leaf sage 'Purple Knockout' RHS

Synonyms

Salvia lyrata 'Purple Prince'
Salvia lyrata 'Burgundy Bliss'
Salvia lyrata 'Purple Volcano'
Salvia 'Purple Knockout'

Plants for pollinators
Herbaceous Perennial
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A clumn-forming herbaceous perennial, up to 60cm high, with a rosette of shiny, burgundy-coloured leaves which turn red in autumn, and small, white or pale lavender flowers in late spring and 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 or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
West–facing or South–facing or East–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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lamiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
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 sandy well-drained soil in full sun

Propagation

Propagate by semi-ripe cuttings

Suggested planting locations and garden types

  • Gravel garden
  • Cottage and informal garden
  • Coastal
  • Mediterranean climate plants
  • Wildlife gardens
  • Garden edging
  • Ground cover
  • Flower borders and beds

Pruning

Cut back spent flower spikes to prolong flowering

Pests

May be susceptible to aphids, capsid bug, leafhoppers, slugs and snails

Diseases

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