Passion flower is a dramatic, fast‑growing climber with intricate mblue‑and‑white flowers that look almost too exotic for UK gardens. Fortunately, Passiflora caerulea is one of the hardiest species, thriving in warm, sheltered positions such as south‑facing walls, sunny fences and protected courtyards. Once established, it can reach several metres, creating a lush, architectural backdrop through summer and autumn.

Sow from February to July using a fine seed compost. Passion flower seed can be slow and erratic to germinate, taking anywhere from three to eight weeks, so warmth and patience are key. Keep at 20 to 25°C and maintain even moisture. Once seedlings are large enough to handle, pot them on individually and grow in bright, warm conditions.

Plant out in late spring or early summer into a sunny, sheltered spot with well‑drained soil. Provide strong support such as trellis, wires or an arch. Water regularly during establishment, then sparingly once plants are settled. Passion flower blooms from midsummer onwards, followed by orange fruits that are ornamental only and not edible.