International Clematis Society Logo


Welcome to all Clematis Lovers.

Our first Webinar!

The first Webinar by the International Clematis Society has just finished and I am rapidly writing this section before posting the October update of our website.

Being our initial event, it was limited to Society members only, so we were please to have 27 memberships, spread across ten different countries and representing over 15% of the membership. Being an international society, the timing of the event would always present a problem for some members, so to those in Australasia and the far East, we're sorry if it was the middle of your night. For those who couldn't connect with the live event, or would like to see it again, we hope to make it available online in the near future.

Our President, Jeff Jabco (Director of Grounds and the Coordinator of Horticulture at Swarthmore College and the Scott Arboretum), led the event with an illustrated talk about some of the results of the clematis trial that started in the USA in 2014 at three main locations and a small number of secondary ones. This was followed by four short videos of clematis at Chanticleer and Longwood Gardens.

Initial feedback from attendees has been very positive, not only for the content but also for having been able to see and (briefly) communicate with other members, something few of us are able to do at the moment.

We hope to run another similar event late this year, but perhaps with contributions from other members. The next newsletter will say more about this. With current restrictions on movement, both nationally and internationally, we hope these will help to stimulate, education and inform, keeping you all up to date on "all things clematis".

Coronavirus (COVID-19) Update

The Society sends our best wishes to clematis lovers all round the world, to their families and their friends. We also salute those in the essential services, especially health services, for their dedication to duty, often at risk to their own health. Take care and stay safe.

Fiona and I are still going for a walk of at least one hour on most days, though as autumn and then winter come upon us, we'll have to see how we cope with the weather.

Some parts of the United Kingdom have recently introduced new restrictions on movement and meeting with other people. Fortunately these do not apply to us, yet. The future for all is quite uncertain at the moment.

Travel to other countries continues to be problematic, with new restrictions and requirements being announced frequently and at short notice. I cannot see us travelling abroad for some time.

As we reported some time ago, Denmark 2020 has been postponed to July 2021. All attendees have been informed. If you have questions, please contact our Secretary.

And finally, the Delaware Clematis Meeting in the USA, originally planned for September 2020, and organized and hosted by Deborah Hardwick, has also had to be rescheduled for September 2021.

When it is available, you will find more information on both of these rescheduled events on our Future Events page.

2020 Seed Exchange

Our Seed Exchange, a benefit for all members, is closed for this year. We thank our new Seed Exchange Administrator, Benedikt Herian from Germany, for his work sorting, preparing, cataloguing and posting the seed which members have sent in.

New regulations governing the sending of seeds into the EU from an outside (non-EU) location should by now have been introduced. They were scheduled for December 2019 and would have required a phytosanitary certificate to accompany any seed sent. We believe this has been delayed/deferred due to the COVID-19 pandemic. We are trying to confirm exactly what the position is now and will update members once we've been able to do so, though when this may be is difficult to know.

The International Clematis Registrar, and the International Clematis Register and Checklist

My thanks to the new Clematis Registrar, Sarah Holme, for her introduction and listing of 2019 Clematis Registrations, published in our latest journal, Clematis International 2020. Although furloughed for a while, I understand she is back and working as normal

The International Clematis Register and Checklist 2002, which went out of print some time ago, is also available in electronic format. One benefit of this is that it allows text searching.

Details for The Register and all six supplements can be found via the RHS website at However because of the file size of the Register itself, approximately 25 Mbytes, it cannot be downloaded from the RHS web site in the same way that the supplements can. To help the RHS and reduce their workload, Society members wanting a copy should email Ken Woolfenden, I.Cl.S. Webperson and Editor, at icls editor, who will return a download link.

The Society fully endorses the work of the International Clematis Registrar, The International Clematis Register and Checklist 2002 and the six supplements published so far. We recommend all clematis lovers use the standards they describe.

There is, of course, still a need for all Clematis breeders, both professionals and amateurs, to register your Clematis cultivars with the Registrar to continue to keep the International Clematis Register up to date. If you want a copy of the form, information about it is available at the Clematis Registration Form.

General Data Protection Regulation - GDPR

This European Union Regulation came into effect earlier this year and applies to any organization, large and small, that stores personal data of EU citizens electronically.

A draft Privacy Policy was drawn up and discussed at the Council Meeting in July 2018. We are still working on modifications and amendments. Once completed and the resulting document is agreed by your Council, it will be released to all members and posted in this website.

The Society is committed to complying with this regulation. Should any member have any questions or concerns regarding it, please contact our designated Data Controller, Ken Woolfenden.

International Clematis Society on Facebook

Don't forget to visit our Facebook page for updates on what's happening in our garden, as well as clematis news from other members. All you need do is click      or use the button to your left.

Clematis for Beginners List

The Society's Clematis for Beginners List gives a list of cultivars that are very suitable for clematis novices around the world. It was reviewed and revised during our meeting in Devon and Cornwall in 2015. It has been available online for a few months and also as a downloadable version from our Clematis for Beginners Download section. Recently we have added a German language version to the English and Dutch issues, thanks to Heidrun Kläser.

All the clematis on the list are easy to grow, easy to look after and resistant to common pests and diseases, and whilst there are no absolute guarantees where gardening is concerned, most people should have success with all of these.

Because space is not so much of a problem, the online version of the list now contains more information about each clematis featured within it, along with a simple menu bar to let you see each group and then pick the clematis you're interested in. The downloadable version (no illustrations, I'm afraid) folds into a handy booklet, very suitable for taking with you when you visit your local nursery or garden centre!

Journal Index of Clematis References

A reminder of a facility which I'm sure many of you will find most useful - an index of references to all the clematis mentioned in the journals of the Society, both in the text and as pictures. I am indebted to Ton Hannink for all the work he has put into producing the first issue of this index. The index currently covers the years 2005 - 2014 inclusive. Further years will be added as they are completed. Whilst it is quite a large document, some 29 pages, it is not a particularly large file to download should you wish, just under 220 Kbytes. You can find it by visiting the Previous Journals page.

RHS Clematis Catalogue Collection

The Royal Horticultural Society of Great Britain holds a collection of Nursery Catalogues and have been keen to add to it. A number of years ago the Society was asked to canvas our members for any Clematis Nursery catalogues which they had and would donate to the collection, which we did. Quite a few have been donated so far.

Whilst he was the International Clematis Registrar, Duncan Donald extracted a list of catalogues from Clematis Specialists which are currently within the collection and a list of catalogues which feature clematis, but under such headings as "climbing plants" or "climbers". You can find them at RHS Clematis Catalogue Collection and RHS Climbers and Climbing Plant Catalogue Collection. Links to both these files can also be found via the "Information, Answers and Questions" link on the left of this page.

The Society has asked where further donated catalogues should be sent. As soon as we have this information it will be publish here.

Clematis Nomenclatural Standards List by Wim Snoeijer

Wim Snoeijer has provided another update to this list, and added a few more images. You can find it at Clematis Nomenclatural Standards List. I've changed the format slightly and the images, instead of being embedded within the list which made it a little disjointed, are now available by clicking on the link to make them appear in a separate window. The list is also available as a downloadable .pdf file.

Over the next few months I hope to add many more images, and at higher resolutions than currently displayed.

If you are unfamiliar with the concept of Nomenclatural Standards you may wish to read the article by Wim Snoeijer that was published in Clematis International 2010.

Nursery Membership

The Society offers a second category of membership - Nursery Membership. So far we have been very pleased with the support that many nurseries have given by renewing as Nursery Members. We thank them all.

These Nursery Members can be found on a special Nursery Members page on this website.

The Society hopes you will recognize that, as members of this Society, these Nursery Members have a particular interest, knowledge and love of clematis and can be expected to provide a range and quality of plants, and informed knowledge, not usually available in non-specialist outlets. Please check this page regularly for additions.

Whilst it is now too late for your nursery details to be included in Clematis International 2011, any further Nursery Memberships will be published on this website as they are received and also in the List of Members when it is reissued at the beginning of next year.

Trialing New Clematis

An example of a Clematis Trial contract, mentioned in the article in Clematis International 2008 about trialing new clematis by well-known clematis breeder, Wim Snoeijer, can be downloaded by visiting the A.O.B. (Any Other Business) page accessible from our Information, Answers and Questions section.

How do you pronounce .....

If you're uncertain how to pronounce some clematis names, why not visit Clematis on the Web. A number of cultivar entries now have a helpful "how to say" feature.

A classic example is probably C. 'Mrs Cholmondeley'. How do you pronounce this? Just take a look at Clematis on the Web - Mrs Cholmondeley, click on the loudspeaker icon and find out for yourself.

This is an extreme example but I'm sure there are many others that people may be unsure of, but don't like to ask. Now you can find out in the privacy of your own home.

And finally ....

The ethos of the Internet is to be an open forum for ideas, views and opinions. Sites should encourage visitors to link to other sites, it's a two-way process. So if you've got a few moments, why not look at our Clematis Links page and follow up one or two. You may find a lot more than you were expecting!

For any non-members visiting this site, have you considered joining the Society? With plans for some very interesting meetings over the next few years there couldn't be a better time. For details, visit our How to Join page.

Last message - for any new visitors. If you cannot see a set of menu buttons down the left hand side of your screen your link to this site may be incorrect. Please re-visit by calling

Return to top of page

This site has been designed and built by me, Ken Woolfenden. I'm always interested in any comments or suggestions you have regarding this site. Please email me at
icls editor.
However, if you have a question please use the Question and Feedback Form.

RHS Affiliation No. 10570644

@ K.Woolfenden

All information contained at this site is personal to Ken Woolfenden and
does not represent the official view of the International Clematis Society.