Glandularia canadensis 'Toronto'

RHS Plant Profile
rose vervain 'Toronto'

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rose vervain 'Toronto' RHS 1999

Other common names

vervain 'Toronto'

Synonyms

Verbena canadensis 'Toronto'

Annual Biennial Bedding

A bushy plant with bright green foliage and vivid reddish-purple flowers in dense racemes to 4.5cm in length, in summer and autumn

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

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

Position

Full sun
Aspect
West–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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Verbenaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Glandularia are annuals or herbaceous perennials, native to The Americas and closely-related to Verbena (and included within Verbena until recently). Showy flowers typically have 5 petals and are held in rounded clusters in summer and autumn
Name Status
Accepted

How to Grow

Cultivation

Grow in moderately fertile, moist but well-drained soil in full sun

Propagation

Propagate by seed sown in early spring at 18-21°C

Suggested planting locations and garden types

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

Pruning

Cut back after flowering

Pests

Damage by slugs may be a problem

Diseases

Susceptible to powdery mildews