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Salvia patens 'Cambridge Blue' AGM

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© RHS 1994

Characteristics

Plant type

Bedding or Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H3 (half hardy - unheated greenhouse/mild winter)

Colour

Flower

Pale Blue in Autumn and Summer

Foliage

Pale 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

gentian sage 'Cambridge Blue'

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

'Cambridge Blue' is a tuberous-rooted herbaceous perennial to 75cm in height, with large, oval, pale green leaves and slender spikes of light blue, two-lipped flowers 2.5cm across

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing
  • Sheltered

Cultivation

Best grown in humus-rich, moist but well-drained soil in sun, shelter from cold winds

Soil

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

Propagation

Propagate by seed

Suggested planting locations and garden types

Cottage/Informal Garden or Flower borders and beds


How to care

Pruning

No pruning required

Pests

May get slugs, snails and leafhoppers

Diseases

Generally disease free