Calystegia soldanella

RHS Plant Profile

sea bindweed

RHS

Other common names

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

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

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
Name Status: Correct

How to Grow

Cultivation

A native plant found only on the coast, needing open, sunny conditions and very sharp drainage. Closely related to bindweed, but unlikely to become a garden weed

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