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Salvia pratensis 'Indigo' AGM

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© RHS 1996

Characteristics

Plant type

Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Purple in Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

clary 'Indigo'

Family

Lamiaceae


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

'Indigo' is a lax herbaceous perennial with ovate leaves to 20cm in length, and erect stems bearing long terminal spikes of whorled, violet flowers with brownish-red calyces, in early summer

Synonym(s)

  • Salvia haematodes 'Indigo'
  • Salvia × sylvestris 'Indigo'

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or East-facing
  • Exposed or Sheltered

Cultivation

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

Soil

  • Well-drained
  • Acid, Alkaline or Neutral
  • Chalk, Loam or Sand

Propagation

Propagate by seed in pots in a cold frame in spring

Suggested planting locations and garden types

City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds, Mediterranean Climate Plants or Wall-side Borders


How to care

Pruning

Remove flower spikes as they fade to prolong flowering

Pests

Generally pest free

Diseases

Generally disease free