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Veronica austriaca subsp. teucrium 'Crater Lake Blue' AGM

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© RHS

Characteristics

Plant type

Herbaceous Perennial

Habit

Bushy

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Dark Blue in Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

saw-leaved speedwell 'Crater Lake Blue'

Family

Plantaginaceae


Veronica can be annuals, perennials or sub-shrubs with paired leaves and small flowers usually in terminal or axillary racemes or spikes

'Crater Lake Blue' is an herbaceous perennial forming a mound to 25cm in height, with toothed, oblong leaves and axillary racemes of intense pure blue flowers 12mm width

Synonym(s)

  • Veronica latifolia 'Crater Lake Blue'
  • Veronica teucrium 'Crater Lake'

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, East-facing or West-facing
  • Sheltered

Cultivation

Grow in loamy, moderately fertile, moist but well-drained soil in full sun or partial shade

Soil

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

Propagation

Propagate by division in autumn or spring

Suggested planting locations and garden types

Banks and Slopes, City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds, Garden Edging, Patio/Container Plants or Rock Garden


How to care

Pruning

Remove spent flowers to encourage compact habit and good flowering in the following year

Pests

Generally pest free

Diseases

Susceptible to powdery mildew