Convolvulus tricolor 'Blue Ensign'

RHS Plant Profile
dwarf morning glory 'Blue Ensign'

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dwarf morning glory 'Blue Ensign' Dorling Kindersley 2003
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Annual Biennial
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A bushy, spreading annual to 30cm, with dark green ovate leaves and funnel-shaped deep blue flowers 5cm across, white towards the yellow centre, in summer

Position

Full sun

Soil Types

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

Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–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)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Convolvulaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Convolvulus can be annuals, perennials or shrubs, erect or scrambling, with simple or palmately divided leaves and solitary or clustered, open funnel-shaped flowers
Name Status
Accepted

How to Grow

Cultivation

Best grown in a gritty, well-drained soil in a sheltered, sunny position; alternatively grow in a pot or raised bed. Deadheading will prolong flowering period

Propagation

Propagate by seed sown in mid-spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Coastal
  • Wildlife gardens
  • Flower borders and beds

Pruning

Cut back after flowering

Pests

Generally pest-free

Diseases

honey fungus (rarely)