How to grow Passionflower in the UK
Passiflora caerulea
Passionflower (Passiflora caerulea) is a flower that grows well in UK gardens. Tropical-looking but hardy in mild gardens. Fruits are edible but bland. Cut back hard if it takes over. This guide covers when and how to sow Passionflower, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
Type
Flowers
Difficulty
Moderate
Position
full sun (6+ hrs direct)
Sow
spring
Harvest
—
When to sow & grow Passionflower
Sowing and harvest window through the year (UK):
Jan | Feb | Mar | Apr | May Plant | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
Soil, position & care
- Soil
- Fertile, moisture-retentive soil with support to climb
- Soil pH
- 6.0–7.5
- Position
- Roots in shade/cool, top growth to the light
- Sowing depth
- Plant rootball level; lean toward the support
- Spacing
- Allow 1–3 m per plant
- Sowing
- Plant spring or autumn against a wall, trellis or obelisk
- Growing
- Tie in new growth; water well while establishing
- Harvest & upkeep
- Prune to keep within bounds — timing depends on flowering season
- Watch for
- Aphids, powdery mildew; vine weevil in containers
Companion planting for Passionflower
No specific companion notes for this plant.
Grow Passionflower this year
Add Passionflower to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Passionflower FAQs
How much sun does Passionflower need?
Passionflower prefers full sun (6+ hrs direct).
Is Passionflower easy to grow?
Moderate. Tropical-looking but hardy in mild gardens. Fruits are edible but bland. Cut back hard if it takes over.