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 Stewart Irvine
Riverside® Hybrids Passiflora breeder
Myles Irvine has been growing Passiflora for over 30 years, releasing a number of hybrids over that time. The best have been selected for worldwide distribution as the Riverside® hybrids. He also created the Passiflora Online site back in the year 2000, started the Passiflora Online Facebook Group in 2007 and is editor of the free to download Passiflora Online Journal.
Passiflora ‘Snow Queen’PVR in flower at Chessington Garden Centre. Must be selling well as only two left…
Rebecca Hilgenhof, Tropical Nursery Supervisor at the Royal Botanic Gardens Kew popped round to see an incredible Passiflora tetrandra from New Zealand covered in thousands of tiny flowers & also checked out the mysteries of polyploids. Not only that but she kindly collected a Passiflora ‘Snow Queen’PVR for Carlos Magdalena’s ‘Barnes Botanical Garden’ at his home!
Sandra R Schulze reports Passiflora ‘Damsel’s Delight’ and Passiflora ‘Snow Queen’PVR now available in the Pacific North West USA!
Sal La Delfa kindly reports that the only Passiflora Frosts Garden Centres had in stock when he visited were my Riverside® Passiflora hybrids!
Excited to attend with Ann Morling the recording of Gardeners’ Question Time in the Temperate House at Kew Gardens, a week before it was open to the public. £41 million spent on the refurb but looks incredible. Just need to wait 50 years for all the plants to grow into it. And I even got to ask a question about Passiflora seed germination! GQT iPlayer recording.
Great to see the Riverside® Passiflora hybrids slowly spreading worldwide. Available in Europe everywhere from France, Germany, Hungary, Poland, Spain, Switzerland to UK and more. In USA Passiflora enthusiast Dan Pogust has just spotted Passiflora ‘Snow Queen’ is in stock now at Pistils Nursery in Portland Oregon, USA. Thanks for the pics Dan!
Lovely to see an article in Garden Design Magazine on growing Passion flowers and featuring Passiflora ‘Snow Queen’.
I’ve just read Carlos Magdalena’s book, ‘The Plant Messiah’. Inspirational in so many ways including various thoughts re my Passiflora breeding. A book that says enough is enough. Not everyone, indeed few of us, have the courage to put our lives on the line seeking out plants in remote and sometimes dangerous places, but each of us can do our own little bit. See my review.
Buy here. Amazon UK
Great to see the Riverside® Hybrids Passiflora ‘Damsel’s Delight & Passiflora ‘Snow Queen’ in the 2017-2018 PlantHaven Premium Plant Catalogue. Each year sales are building with increasing availability throughout Europe, Canada & USA. Check out out list of some of our bigger Wholesalers here.
Surprise visit from Sergio Lloreda of Nature & more, commercial Passion fruit grower and exporter from Bogotá, Colombia. Great fun, a good exchange of info and an assortment of Passiflora chopped up!
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.