Clematis awarded the UK's Royal Horticultural Society's Award of Garden Merit (AGM)

A number of clematis have been trialed in the UK by the Royal Horticultural Society (RHS) and as a result a number of plants have been given a prestigious Award of Garden Merit. For information about the RHS AGM please see the RHS web site at:

On this web site we have indicated which plants have an AGM award using the RHS AGM logo which is above.

For a full list of the clematis plants which have been awarded an AGM please see the RHS web site at: and enter 'clematis' in the plant name box and press search. You can then click on the results and list them on the screen.

RHS Late Large-flowered Clematis Trial 2012 - 2015

However, as of the 1st December 2016 the Royal Horticultural Society had not updated the plant AGM list with the results of the Late Large-flowered Clematis Trial.

In 2016 the RHS announced five newly awarded AGMs, to C. 'Ascotiensis', C. 'Perle d'Azur', C. 'Remembrance', C. 'Roko-Kolla' and C. 'Zohapbi' HAPPY BIRTHDAY.

Reconfirmed were AGMs for C. 'Błękitny Anioł', C. 'Comtesse de Bouchaud', C. 'Ernest Markham', C. 'Gipsy Queen', C. 'Huldine', C. 'Prince Charles' and C. 'Evipo001' WISLEY.

There were also some plants that lost their AGMs and they were C. 'Aotearoa' and C. 'Madame Grangé'. This doesn't, of course, mean you shouldn't grow them, but perhaps they need special attention.

The Society has featured this trial in the 2014, 2015 and 2016 issues of Clematis International with articles by Fiona Woolfenden.

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@ 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.