The Riverside® Passiflora Hybrids
Riverside® Hybrids – Our vision
“Our vision is to supply growers with hardy and distinct polyploid hybrids. This ensures that the hybrids which we release are easy to care for, vigorous, hardy, free-flowering and spectacular.”
Myles S Irvine
Riverside® Hybrids Passiflora breeder
Myles Irvine has been growing Passiflora for over 30 years and has released a number of hybrids over that time. With Passiflora particularly creating new hybrids is a war of attrition, but the satisfaction of the successes is always worth the wait. The best of these have been selected for worldwide distribution as the Riverside® hybrids.
Plant Breeders Rights Granted (48,160) by CPVO for the Riverside® Hybrid Passiflora ‘Snow Queen’. This has been a long slow process but we got there in the end thanks to the endeavours of PlantHaven International,inc. Picture shows breeder Myles Irvine with the ‘Snow Queen’ herself, Natalia Walaszek.
The off season Well in a way but the work goes on. A surprising number of the more tropical species flower in December/January as flowering is triggered by shorter day length. Pictures from 2017 of an interesting new polyploid hybrid. Unusual in that it does not open any further than this. Sleeves rolled up for a productive 2018. Only release the best!
Royal Botanical Gardens Kew A fabulous behind the scenes visit to the nurseries at Kew catching up with both Rebecca Hilgenhof & Carlos Magdalena, author of The Plant Messiah. I saw more Passiflora than I could count and indeed many other incredible plants. A day to remember and good learning experience. Picture shows Rebecca holding a huge Passiflora macrophylla leaf. It is one of the Astrophea, which are trees rather than climbing vines.
Plantarium Trade Fair. The Riverside® Hybrids Passiflora ‘Damsel’s Delight & Passiflora ‘Snow Queen’ have been added to the prizewinning FleuraTerraza range by Dutch climber specialists Van der Starre. FleuraTerrazza includes a range of climbers selected to ensure they will bloom in spring, summer and after summer.
‘Pure Passion’ Plant Profile
on Myles Irvine, Riverside® Passiflora breeder, by Philip Clayton
The Garden (RHS) Volume 135 Part 9 September 2010
Investigation of Passiflora hybrids using flow cytometry
L.A. King and M.S. Irvine
Passiflora (2010), 20(1):pp. 5-11
Passiflora Online Journal ISSN 2046-8180.
Ten issues to date, articles by academics and enthusiasts worldwide. Fabulous photo galleries. Publisher and Editor Myles Irvine, Riverside® Passiflora breeder.
Download issues here
The history of Passion flower hybrids
The earliest known Passion flower hybrids were created in the early 19th century. Since that time hundreds of hybrids of these fabulous flowers have been created, of which sadly many have been lost over the years. Few are hardy however and fewer still are polyploid, Polyploidy means having more than the usual two sets of paired chromosomes. It is one of Nature’s ways of speedily adapting to environmental change. Our advanced breeding techniques are now starting to produce polyploid Passion flowers with three or even four sets of chromosomes per cell. This gives easy to care for plants with increased vigour and larger, stronger flowers which often stay open for several days.
Riverside® Hybrids have the following advantages for both nurseries and home gardeners:-
All the selected Riverside® hybrids are free-flowering, producing flowers at every node over a period of many months, often May-November.
The solidity of the striking polyploid flowers lends itself to more intense colours that stand out strongly against other plants around them.
All Riverside® Hybrids compare favourably with Passiflora caerulea, producing bigger, stronger longer lasting flowers.
Hardiness is approximate but these should survive occasional dips down to -8°C, 18°F or USDA zone 8b.