Veronica longifolia 'Marietta'PBR

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garden speedwell 'Marietta'

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garden speedwell 'Marietta' RHS / Joanna Kossak
garden speedwell 'Marietta' RHS / Joanna Kossak
garden speedwell 'Marietta' RHS / Joanna Kossak
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Herbaceous Perennial
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'Marietta' is an upright herbaceous perennial up to 1.2m high with lance-shaped to linear, pointed, toothed, dark green leaves, to 12cm long, and dense, erect, terminal racemes, 25cm long, of deep violet-blue flowers, in late summer and early autumn

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

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

Position

Full sun Partial shade
Aspect
North–facing or West–facing or South–facing or East–facing
Exposure
Exposed or 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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Plantaginaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
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; propagation for resale is prohibited without a licence

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Wildlife gardens
  • Flower borders and beds

Pruning

Deadhead after flowering, remove faded flower stems in the autumn

Pests

May be susceptible to aphids

Diseases

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