Veronica austriaca subsp. teucrium 'Crater Lake Blue'

RHS Plant Profile
saw-leaved speedwell 'Crater Lake Blue'
saw-leaved speedwell 'Crater Lake Blue' RHS

Synonyms

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

Award of Garden Merit
Herbaceous Perennial

An herbaceous perennial forming a mound to 25cm in height, with toothed, oblong leaves and axillary racemes of intense pure blue flowers 12mm width

Position

Full sun, Partial shade

Soil Types

Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Loam
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
West–facing or South–facing or East–facing
Exposure
Sheltered
Hardiness
H6
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Plantaginaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Veronica can be annuals, perennials or sub-shrubs with paired leaves and small flowers usually in terminal or axillary racemes or spikes
Name Status
Accepted

How to Grow

Cultivation

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

Propagation

Propagate by division in autumn or spring

Suggested planting locations and garden types

  • Patio and container plants
  • Rock garden
  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Banks and slopes
  • Garden edging
  • Flower borders and beds

Pruning

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

Pests

May be susceptible to aphids

Diseases

May be susceptible to downy mildews, fungal leaf spot, fungal rot, Phytophthora and sometimes honey fungus