Passiflora ‘Amethyst’

Description

🌸 Flowers

• Colour: Soft purple to purple‑blue tepals with deep violet‑purple filaments and green anthers.
• Size: Around 10 cm across.
• Form: Tepals gradually reflex as they age, giving the flowers a star‑like shape.
• Flowering period:
  • Late summer to autumn in most UK gardens.
  • In warm regions or under protection, it may flower intermittently year‑round, with peaks in spring and autumn.
• Flowering performance: Mature plants can produce dozens of flowers per day in ideal conditions.
• Pollinator value: Highly attractive to bees, butterflies, and other beneficial insects.

🍃 Foliage

• Type: Evergreen in mild areas; may become semi‑evergreen or deciduous in colder regions.
• Leaves: Deep blue‑green, three‑lobed, glossy, forming a lush backdrop for the flowers.
• Habit: A tendril‑climbing vine that clings without damaging brickwork or fences.

🍈 Fruit

• Appearance: Egg‑shaped orange‑yellow fruits, up to 6 cm long.
• Season: Late summer into autumn.
• Edibility:
  • Fruits are edible when fully ripe, though not especially tasty.
  • Unripe fruit is toxic; raw plant parts should not be eaten.

📏 Size & Growth

• Height: Typically 4–8 m outdoors.
• Spread: 2.5–4 m.
• Growth rate: Fast; can reach several metres in a few seasons.
• Parentage: A historic UK hybrid between Passiflora kermesina and Passiflora caerulea, giving it improved hardiness and floriferousness.

🌤 Growing Conditions

• Light:
  • Full sun for best flowering.
  • Tolerates partial shade.
• Aspect: South‑ or west‑facing walls are ideal.
• Soil:
  • Moist but well‑drained.
  • Suitable for chalk, loam, sand, acidic to alkaline soils.
• Hardiness:
  • Rated H3 — hardy in mild UK regions; may need winter protection in colder areas.
• Watering:
  • Deep, infrequent watering encourages a strong root system.
  • Keep soil slightly drier in winter.
• Feeding:
  • Avoid heavy manure or compost — encourages foliage at the expense of flowers.

✂️ Pruning & Maintenance

• Pruning time: Late winter or early spring.
• Method:
  • Trim to control size; remove long, straggly shoots.
  • Pinch terminal buds to encourage branching.
• Training:
  • Allow some stems to hang or droop — these flower more freely.
• Protection:
  • In northern regions, provide winter protection or grow against a warm wall.

🌿 Garden Uses

• Climbing over trellises, fences, pergolas, arches
• Exotic accent in courtyard gardens
• Suitable for containers in conservatories or greenhouses
• Excellent for Mediterranean, sub‑tropical, or cottage‑style plantings
• Wildlife‑friendly gardens (bee‑rich flowers)

⭐ Notable Qualities

• RHS Award of Garden Merit winner.
• One of the most floriferous and reliable purple passionflower hybrids.
• Distinctive lavender‑amethyst colour not found in the common P. caerulea.