Calystegia soldanella

RHS Plant Profile
sea bindweed

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sea bindweed RHS

Other common names

cynghafog arfor, Scotch scurvy grass, sea bells, sea coal, sea foal-foot

Synonyms

Convolvulus soldanella

Herbaceous Perennial
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A trailing, rhizomatous perennial up to 1m across but only 10cm tall, with succulent stems and kidney-shaped leaves. Upward-facing, trumpet-shaped flowers, pink with five white stripes, are produced in summer. A native plant found only on the coast, closely related to bindweed, but unlikely to become a garden weed

Position

Full sun

Soil Types

Sand

Max Height

Up to 10 cm

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
Up to 10 cm

Growing Conditions

Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed
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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Convolvulaceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Trailing
Genus
Calystegia is a genus of around 25 species of annual or herbaceous perennial, twining vines with spiral-shaped leaves and trumpet-shaped white or pink flowers
Name Status
Correct

How to Grow

Cultivation

Required an open site with sunny conditions and very sharp drainage

Propagation

Propagate by seed or by division of rhizomes

Suggested planting locations and garden types

  • Gravel garden
  • Coastal

Pruning

No pruning required

Pests

May attract slugs and snails

Diseases

Generally disease-free