Passion flower

Passion flowers – Grow Guide

Discover how to grow passion flowers (Passiflora) in this handy grow guide.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Plant
Plant

Do not Plant in January

Do not Plant in February

Do Plant in March

Do Plant in April

Do Plant in May

Do not Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do Plant in October

Do Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does not flower in June

Plant does flower in July

Plant does flower in August

Plant does flower in September

Plant does flower in October

Plant does flower in November

Plant does not flower in December

Prune
Prune

Do not Prune in January

Do not Prune in February

Do not Prune in March

Do Prune in April

Do not Prune in May

Do not Prune in June

Do not Prune in July

Do not Prune in August

Do not Prune in September

Do Prune in October

Do not Prune in November

Do not Prune in December

Like nothing else, passion flowers (Passiflora) offer the most incredible flowers.

Planting position

Plant passion flowers in a position of full sun. The foot of a sheltered, sunny wall in a well-drained soil will provide the best results. Passion flowers enjoy a moist but well-drained soil.

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Passion flowers can also be grown in containers. Here, they prefer a more gritty compost that offers free drainage. Avoid a peat-based compost as these can easily become waterlogged.

Avoid a windy spot as foliage can easily be damaged by strong winds.    

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Planting technique

Propagation

Growing passion flowers from seed is not easy. Plants that are produced from seed can take over a decade to flower, so propagation from cuttings is preferable.

Take cuttings in early spring. Remove new growth from below a node – about 6cm in length is long enough. Remove the bottom leaves and tendrils and place the cutting in a pot of cutting compost. Cuttings will root successfully when placed in a propagator with bottom heat of around 20°C. 

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Troubleshooting

A very wet and cold winter can lead to the loss of hardy passion flowers. A cold and wet winter is far from ideal. To avoid losing plants, dig in some horticultural grit before planting if you have a heavy soil.

Stems carrying foliage that has been damaged by wind or frost should be cut back in spring.    

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Care

Tender passion flowers grown in a container should be moved into a frost-free place for winter. If growing in a greenhouse or conservatory protect the plants from too much direct sunlight with greenhouse shading.

Prune passion flowers after flowering just to keep them neat, cutting back to a healthy bud. There is no need to cut them back hard. If plants have got out of hand and need retraining, cut them back in spring. 

Passion flower tendrils

Red watering can

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Passion flowers to grow

  • Passiflora caerulea – blue, white and green flowers in July to October. Hardy. Egg-shaped orange fruits follow the flowers in a good summer. Reaches a height of 10m
  • Passiflora caerulea ‘Constance Elliot’ – white, scented flowers. Flowers from July to October. Reaches a height of 10m. Often needs some winter protection although described as hardy
  • Passiflora edulis – blue and white flowers in July and August. Only suitable for a cool, but frost-free greenhouse or a sheltered, south-facing city garden. Has black edible fruits. Reaches a height of 5m
  • Passiflora antioquiensis – tender, so winter protection is essential. Soft red flowers with a violet corona. Produces yellow fruits. Reaches a height of 5m
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  • Passiflora mollissima – the flowers of this species are very different. Long tubular, pale-pink flowers in July and August. Tender, so needs winter protection. Climbs to a height of 4m