Dahlia expert laments loss of trials at Wisley

National Dahlia Society (NDS) archivist and long-standing RHS plant committee member David Brown has criticised the ending of permanent trials including those for iris, delphinium, sweet pea and dahlia at RHS Garden Wisley after almost a century of testing the plants.

You must sign in to continue.

You can register for a 14 day free trial subscription, or Subscribe Now for full access. View subscription options.

Please enter your details

Forgotten Password?

Having trouble signing in?

Contact Customer Support at

or call 020 8267 8121, or refer to our answers to frequently asked questions.

Subscribe for full access

Direct Debit

Most people subscribe by direct debit.


Credit Card

Subscribe by credit card


or Register for a 14 day free trial subscription

Already subscribed but don't have a password?

Activate your web account here