Passiflora racemosa

RHS Plant Profile

red passion flower

RHS 1990

Synonyms

Passiflora princeps

Climber Wall Shrub Conservatory Greenhouse

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An evergreen climber to 5m, with 3-lobed leaves and pendent racemes of crimson flowers to 12cm across, with dark purple and white coronal filaments followed by pale green fruits. The pulp in the fruits only can be eaten when they are fully ripe and yellow-orange. Unripe fruit is toxic

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.5-1 metres
Max Height: 4-8 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–facing or East–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): H1A

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Passifloraceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Climbing
Potentially harmful: Fruit are ornamental - not to be eaten. Wear gloves and other protective equipment when handling Pets: Fruit are ornamental - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Passiflora are mostly tender tendril-climbing shrubs, with simple or palmately-lobed, generally evergreen leaves and showy flowers of distinctive structure with often colourful coronal filaments, followed by conspicuous fruits, edible in some species
Name Status: Correct
Plant Range: Brazil

How to Grow

Cultivation

Under glass grow in peat-free, loam-based potting compost in full light with shade from hot sun. Water freely when in growth and keep just moist in winter. May be grown outdoors in most fertile, moist but well-drained soils. Provide support for climbing stems and shelter from cold, drying winds

Propagation

Propagate by seed sown at 13 to 18°C in spring or root semi-hardwood cuttings in summer. Layering can be carried out in spring or autumn

Suggested planting locations and garden types

Patio and container plants
Wall side borders

Pruning

Pruning group 11 or pruning group 12 in early spring

Pests

May be susceptible to glasshouse red spider mite, scale insects and glasshouse whitefly

Diseases

May be susceptible to honey fungus (rarely) and a virus