Passiflora x colvillii
Passiflora x colvillii
Safety & Hazards
None known
Cultivation Details
Requires a well-drained soil with plenty of moisture in the growing season, otherwise it is not fussy[1, 2]. Dislikes highly alkaline soils[3]. Hardy to about -15°c, if plants are cut down to the ground by frost they can regenerate from the base[2]. It is best to apply a good mulch to the roots each winter in order to protect them from the cold[4]. Very fast growing[5]. Roots of outdoor grown plants should be restricted to encourage fruiting[1]. Plants produce tendrils and climb by attaching these to other plants. If fruit is required, especially when the plant is grown indoors, it is best to hand pollinate using pollen from a flower that has been open for 12 hours to pollinate a newly opened flower before midday[6, 2]. The flowers open in sunny weather and do not open on dull cloudy days[7]. Plants are very tolerant of pruning and can be cut back to ground level if required to rejuvenate the plant[3]. Any pruning is best carried out in the spring[7]. Plants in this genus are notably resistant to honey fungus[2].
Propagation
Pre-soak the seed for 12 hours in warm water and then sow late winter or early spring in a warm greenhouse. If sown in January and grown on fast it can flower and fruit in its first year[6]. The seed germinates in 1 - 12 months at 20°c. Prick out the seedlings into individual pots when they are large enough to handle. It you are intending to grow the plants outdoors, it is probably best to keep them in the greenhouse for their first winter and plant them out into their permanent positions in late spring or early summer, after the last expected frosts. Mulch the roots well in late autumn to protect them from the cold. This species is a hybrid and, as such, will not breed true from seed. Cuttings of young shoots, 15cm with a heel, in spring[1]. Leaf bud cuttings in spring. Cuttings of fully mature wood in early summer. Takes 3 months. High percentage[8]. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-21. <temperate.theferns.info/plant/Passiflora+x+colvillii>
Pollinators
Bees
References
- [1]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
- [2]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
- [3]Climbers and Wall Shrubs. — Davis. B. · Viking. · 1990 · ISBN 0-670-82929-3 ↩︎Contains information on 2,000 species and cultivars, giving details of cultivation requirements. The text is terse but informative.
- [4]Passion Flowers — Vanderplank. J. · Cassell. London. · 1991 · ISBN 0-304-34076-6 ↩︎An excellent book on passion flowers, giving information on hardy species and how to grow the less hardy in greenhouses etc. A bit lacking at times on specific information on hardyness. Excellent photographs.
- [5]Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. — Bean. W. · Murray · 1981 · ISBN - ↩︎A classic with a wealth of information on the plants, but poor on pictures.
- [6]The Garden. Volume 112. — RHS. · Royal Horticultural Society · 1987 · ISBN - ↩︎Snippets of information from the magazine of the RHS. In particular, there are articles on plants that are resistant to honey fungus, oriental vegetables, Cimicifuga spp, Passiflora species and Cucurbits.
- [7]Gardening on Walls — Grey-Wilson. C. & Matthews. V. · Collins · 1983 · ISBN 0-00-219220-0 ↩︎A nice little book about plants for growing against walls and a small section on plants that can grow in walls.
- [8]Growing Unusual Fruit. — Simmons. A. E. · David & Charles; Newton Abbot. · 1972 · ISBN 0-7153-5531-7 ↩︎A very readable book with information on about 100 species that can be grown in Britain (some in greenhouses) and details on how to grow and use them.