Dahlias are becoming increasingly fashionable. In particular, single-flowered and collarette dahlias are catching everyone's eye so after trialling many of them in recent years the RHS has produced a twelve page full colour bulletin entitled Open-centred Dahlias.
Written by Wisley's Sue Drew, from RHS Trials Office, who has special responsibility for the dahlia trials, the bulletin covers both single-flowered types and collarette dahlias (collarettes are those with additional shorter petals around the eye).
This excellent guide starts with a short history of the dahlia and then illustrates all the thirteen different flower forms, to show the amazing range available. A wide range of the best singles and collarettes is illustrated and each is briefly described, all those chosen have either already been honoured with an Award of Garden Merit or look well set to gain the award soon. Suppliers are noted for each variety - very useful. There's also a very good guide to growing dahlias, a discussion on breeding new dahlias and some thoughts on planting partners for single dahlias.
The whole bulletin provides a valuable introduction to these long flowering and prolific plants, all written in an easy to follow style and with plenty of excellent pictures.
What's more, you can download this new Dahlia bulletin FREE from the RHS website. Or check out the RHS Plant Bulletins page for a list of all the free Plant Trials Bulletins on offer.
Yet another excellent RHS Plant Bulletin based on the society's trials.