Veronica teucrium 'Royal Blue'

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saw-leaved speedwell 'Royal Blue'

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saw-leaved speedwell 'Royal Blue' RHS

Synonyms

Veronica 'Royal Blue' [2], Veronica austriaca 'Royal Blue', Veronica teucrium 'Royal Blue'

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Herbaceous Perennial
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A bushy herbaceous perennial to 45cm in height, with toothed, oblong leaves and axillary racemes of clear blue flowers

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
South–facing or West–facing or East–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
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
Synonym

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

  • Cottage and informal garden
  • Flower borders and beds
  • Ground cover
  • Garden edging

Pruning

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

Pests

May be susceptible to aphids

Diseases

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