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Passiflora caerulea 'Clear Sky' (Passion flower 'Clear Sky')

Other names: Passiflora caerulea 'Clear Skies', Blue passion flower 'Clear Sky', Blue crown 'Clear Sky', Flower of five wounds 'Clear Sky', Southern beauty 'Clear Sky', Wild apricot 'Clear Sky'

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Variety or Cultivar
'Clear Sky' is a vigorous, borderline hardy, evergreen climber with palmate, glossy, dark green leaves and, from late summer into autumn, large, fragrant, star-shaped, white flowers with bright violet styles. Flowers are followed by ellipsoid, yellow-orange fruit.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
8 m 2 m 5-10 years
26 ft 6 ft 5-10 years

Where to grow

Soil type
  • Chalky
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
  • Well-drained
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Sun
Aspect
  • West
  • South
Exposure
  • Sheltered

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Additional plant details

Cultivation

Grow in moist but well-drained soil in full sun or partial shade. Site carefully as grows vigorously in ideal conditions. In cold areas, grow in a large container and overwinter indoors.

Suggested uses

Containers/Patio, Sub-Tropical, Cottage/Informal, City, Low Maintenance, Wallside and trellises, Conservatory

UK hardiness

H4

USDA zones

Zone 7, Zone 8, Zone 9, Zone 10

Sunset zone

5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1, H2

WUCOLS

North-Central Coastal = Moderate/Medium
Central Valley = Moderate/Medium
South Coastal = Moderate/Medium
South Inland = Moderate/Medium
High and Intermediate Desert = Inappropriate
Low Desert = Moderate/Medium

Foliage

Evergreen

Habit

Climbing

Native to

Garden origin

Drought tolerant

No

Flood tolerant

No

Toxicity

Harmful if eaten.

Plant care

Pruning

Pruning group 11 or 12 in spring.

Propagation methods

Seed, Layering, Semi-hardwood cuttings

Pests

Glasshouse red spider mite

Scale insects

Red spider mite (box and other)

Diseases

Generally disease-free.

Shorten sideshoots of spring flowering climbers

Prune vigorous spring flowering climbers

Tie climbers in to a frame support

Take semi-hardwood cuttings in late-summer

Plant container grown plants in a sunny sheltered spot

Layer in autumn

Plant in fertile, humus-rich, well-drained soils

Plant in moist but well-drained soil (spring)

Other plants

Plants in this Genus (29)

Passiflora

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Passiflora 'Purple Haze'
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Passiflora 'Purple Haze' Passion flower 'Purple Haze'
Passiflora caerulea
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Passiflora caerulea Blue passion flower
Passiflora caerulea 'Constance Eliot'
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Passiflora caerulea 'Constance Eliot' Passion flower 'Constance Eliot'
Passiflora caerulea 'Eden'
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Passiflora caerulea 'Eden' Passion flower 'Eden'
Passiflora caerulea 'White Lightning'
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Passiflora caerulea 'White Lightning' Passion flower 'White Lightning'
Passiflora caerulea 'Lavender Lady'
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Passiflora caerulea 'Lavender Lady' Amethyst passion flower
Passiflora incarnata
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Passiflora incarnata Maypops
Passiflora racemosa
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Passiflora racemosa Red passion flower
Passiflora edulis
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Passiflora edulis Passion flower
Passiflora x belotii
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Passiflora x belotii Blue passion flower
Passiflora 'Witchcraft'
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Passiflora 'Witchcraft' Passion flower 'Witchcraft'
Passiflora x exoniensis
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Passiflora x exoniensis Exeter passion flower
Passiflora 'Damsel's Delight'
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Passiflora 'Damsel's Delight' Passion flower 'Damsel's Delight'
Passiflora x violacea
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Passiflora x violacea Violet passion flower
Passiflora edulis f. edulis
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Passiflora edulis f. edulis Purple passion flower
Passiflora 'Purple Rain'
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Passiflora 'Purple Rain' Passion flower 'Purple Rain'
Passiflora 'Betty Myles Young'
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Passiflora 'Betty Myles Young' Passion flower 'Betty Myles Young'
Passiflora 'Snow Queen'
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Passiflora 'Snow Queen' Passion flower 'Snow Queen'
Passiflora x violacea 'Victoria'
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Passiflora x violacea 'Victoria' Violet passion flower 'Victoria'
Passiflora caerulea 'Clear Sky'
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Passiflora caerulea 'Clear Sky' Passion flower 'Clear Sky'
Passiflora alata
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Passiflora alata Winged-stem passion flower
Passiflora 'Lady Margaret'
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Passiflora 'Lady Margaret' Passion flower 'Lady Margaret'
Passiflora 'Incense'
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Passiflora 'Incense' Passion flower 'Incense'
Passiflora lutea
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Passiflora lutea Yellow passion flower
Passiflora vitifolia
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Passiflora vitifolia Vine-leaved passion flower
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Companion plants (23)

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Melianthus major 'Purple Haze'
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Melianthus major 'Purple Haze' Honey flower 'Purple Haze'
Melianthus elongatus
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Melianthus elongatus Dwarf honey flower
Trachycarpus fortunei 'Winsan'
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Trachycarpus fortunei 'Winsan' Chusan palm 'Winsan'
Trachycarpus princeps
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Trachycarpus princeps Stone gate palm
Trachelospermum jasminoides 'Winter Ruby'
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Trachelospermum jasminoides 'Winter Ruby' Confederate jasmine 'Winter Ruby'
Trithrinax campestris
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Trithrinax campestris Caranday palm
Dolichandra unguis-cati
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Dolichandra unguis-cati Cat's claw creeper
Solandra maxima
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Solandra maxima Chalice vine
Trachelospermum jasminoides 'Madison'
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Trachelospermum jasminoides 'Madison' Confederate jasmine 'Madison'
Trachelospermum jasminoides 'Tuscani'
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Trachelospermum jasminoides 'Tuscani' Confederate jasmine 'Tuscani'
Sonchus fruticosus
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Sonchus fruticosus Giant sow thistle
Trachelospermum jasminoides 'Tricolor'
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Trachelospermum jasminoides 'Tricolor' Confederate jasmine 'Tricolor'
Dregea sinensis
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Dregea sinensis Chinese dregea
Trachelospermum jasminoides 'Star of Toscana'
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Trachelospermum jasminoides 'Star of Toscana' Confederate jasmine 'Star of Toscana'
Trachelospermum jasminoides 'Wilsonii'
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Trachelospermum jasminoides 'Wilsonii' Confederate jasmine 'Wilsonii'
Gynostemma pentaphyllum
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Gynostemma pentaphyllum Sweet tea vine
Trachelospermum jasminoides 'Waterwheel'
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Trachelospermum jasminoides 'Waterwheel' Confederate jasmine 'Waterwheel'
Tabernaemontana divaricata
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Tabernaemontana divaricata Crepe jasmine
Trachelospermum jasminoides var. angustifolium
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Trachelospermum jasminoides var. angustifolium Star jasmine
Cerinthe major 'Purpurascens'
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Cerinthe major 'Purpurascens' Honeywort 'Purpurascens'
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