Convolvulus cneorum

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silverbush

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silverbush RHS 1998
silverbush visionspictures.com

Other common names

shrubby bindweed, silvery bindweed

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A small spreading evergreen shrub to 60cm in height, with narrowly oblong, very silvery leaves and funnel-shaped white flowers tinged pink in bud, up to 4cm in width

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Chalk Loam 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)
H4
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Convolvulaceae
Native to GB/Ireland
No
Foliage
Evergreen
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
Correct
Plant Range
Mediterranean

How to Grow

Cultivation

Grow in well-drained soil of low to moderate fertility, in a sheltered spot with full sun. Good for containers, using a gritty peat-free, loam-based compost, watering well in the growing season, but keeping drier in winter

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Gravel garden
  • Patio and container plants
  • Mediterranean climate plants

Pruning

Pruning group 8

Pests

Generally pest-free

Diseases

honey fungus (rarely)