Cobaea scandens f. alba

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white-flowered cup-and-saucer vine

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white-flowered cup-and-saucer vine RHS

Synonyms

Cobaea scandens 'Alba', Cobaea scandens var. alba

Climber Wall Shrub Annual Biennial
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A strong-growing, perennial climber grown as an annual, with honey-scented, bell-shaped flowers to 5cm in length, at first greenish, later creamy-white

Position

Full sun

Soil Types

Loam, Sand

Max Height

8-12 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
5–10 years
Max Spread
1.5-2.5 metres
Max Height
8-12 metres

Growing Conditions

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

Position

Full sun
Aspect
South–facing or North–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)
H2

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Polemoniaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Climbing
Genus
Cobaea can be woody or herbaceous climbers with pinnate leaves bearing a branched tendrils, and large, solitary, bell-shaped flowers in the upper leaf axils
Name Status
Unresolved

How to Grow

Cultivation

Under glass grow in a peat-free, loam-based potting compost in full light. When in growth feed with a low nitrogen liquid fertilizer monthly. May be grown outdoors as an annual in moderately fertile, moist but well-drained soil in full sun

Propagation

Propagate by seed sown at 18°C in spring plant out when the danger of frosts has passed

Suggested planting locations and garden types

  • Patio and container plants
  • Wall side borders

Pruning

Pruning group 11 after flowering

Pests

Generally pest-free

Diseases

Generally disease-free