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Veronica austriaca subsp. teucrium 'Royal Blue' AGM

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© RHS

Characteristics

Plant type

Herbaceous Perennial

Habit

Bushy

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Blue in Summer

Foliage

Green in 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 'Royal 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

'Royal Blue' is a bushy herbaceous perennial to 45cm in height, with toothed, oblong leaves and axillary racemes of clear blue flowers

Synonym(s)

  • Veronica austriaca 'Royal Blue'
  • Veronica teucrium 'Royal Blue'
  • Veronica 'Royal Blue'

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

Cottage/Informal Garden, Flower borders and beds, Garden Edging or Ground Cover


How to care

Pruning

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

Pests

Generally pest free

Diseases

May be subject to a downy mildew, powdery mildews and a leaf spot