Blue Passion Flower
Passiflora caerulea
Blue Passion Flower
The passion flower (Passiflora caerulea) is one of the most exotic-looking climbers you can grow outdoors in Britain, yet it is surprisingly tough. Often sold simply as the blue passion flower, this passiflora caerulea earns its RHS Award of Garden Merit for the sheer drama of its blooms: flat, white-petalled stars topped with an intricate corona of blue, white and deep purple filaments, each one looking almost too elaborate to be real. They appear in a long succession from midsummer well into autumn, and in warm seasons are followed by egg-shaped orange fruits.
Why gardeners love it
- Genuinely hardy, the toughest passion flower for UK gardens (RHS H4)
- Long flowering from July to October, often dozens of blooms at once
- Vigorous, self-clinging by tendrils, perfect for covering walls and fences fast
- A magnet for bees and listed on the RHS Plants for Pollinators
As a passion flower plant it is a fast, twining climber that scrambles up to 4 to 8 metres using its curling tendrils, so it is ideal for clothing a sunny wall, trellis, pergola or fence in a single season. Its semi-evergreen, deeply lobed leaves give a lush, almost tropical backdrop to the flowers.
For the best results, plant in full sun in a warm, sheltered position, ideally against a south or west-facing support. It thrives on most free-draining soils, including chalk, and copes with acid, neutral or alkaline ground, asking only for sharp drainage and protection from cold, drying winds. Water well through the first summer to establish, then it becomes pleasingly drought tolerant. A spring prune keeps it tidy and within bounds, and a winter mulch over the roots safeguards it in colder gardens, where top growth may die back before reshooting from the base.
Whether you are looking for passion flower for sale to cover an awkward fence or want a true talking-point climber, this is a rewarding, long-flowering choice. Every passiflora caerulea uk plant we send out is nursery-grown, well-rooted and carefully selected to establish quickly and reward you for years.
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Yes, the blue passion flower is the hardiest of the commonly grown passion flowers and is rated RHS H4, surviving to roughly -10 to -15C once established. In colder or exposed gardens the top growth may die back in a hard winter but usually regrows from the base in spring, especially if the roots are mulched.
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Give it a warm, sheltered, sunny spot, ideally against a south or west-facing wall, fence or sturdy trellis it can scramble up with its tendrils. Full sun produces the most flowers and the best chance of those ornamental orange fruits.
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It is a vigorous climber that can reach 4 to 8 metres in height with a spread of around 1 to 1.5 metres, climbing by tendrils. It responds very well to pruning, so you can keep it to the size of your support.
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It is semi-evergreen, holding much of its foliage through mild winters but often dropping leaves, or being cut back by frost, in colder conditions. Fresh growth reappears from spring onwards.
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The foliage and unripe fruits can cause mild stomach upset if eaten in quantity, so it is sensible to site it away from pets and children who might be tempted to nibble. The ripe orange fruits are bland and generally considered harmless in small amounts, but are not worth eating.
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We always aim to make sure our customers love our products, but if you do need to return an order within 14 days of purchase (not including plants*), or any items are damaged, we’re happy to help. Just email us directly at hello@growtropicals.com, and we’ll take you through the process.
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*Unfortunately we cannot accept returns of undamaged plants as these are perishable items and are not saleable upon return. If a plant is damaged, we will compensate for this as per our live arrival guarantee. -
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