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Salvia patens AGM

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© RHS 1996

Characteristics

Plant type

Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H4 (hardy - average winter)

Colour

Flower

Blue in Autumn and Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

2-5 years


Preferred common name

gentian sage

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

S. patens is an herbaceous perennial to 1m, with ovate to triangular leaves to 20cm in length, and 2-lipped blue flowers 5cm in length, forming a large, open panicle

Other common names

  • blue-flowered sage
  • spreading blue sage

Synonym(s)

  • Salvia patens dark blue
  • Salvia patens 'Oxford Blue'
  • Salvia patens 'Royal Blue'

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or East-facing
  • 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

  • Moist but well-drained
  • Acid, Alkaline or Neutral
  • Chalk, Loam or Sand

Propagation

Propagate by seed sown in pots or by overwintering tubers in damp potting compost. Propagate by rooting basal cuttings or softwood cuttings in spring or early summer

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