The Hampton Court Palace flower show will be celebrating its 20th anniversary this year and has become the world's largest flower showPhotograph: Graham Turner for the Guardian

The Matter of Urgency garden, designed by Jill M W Foxley and part of the flower show's conceptual gardens exhibitions, highlights the condition of overactive bladder (OAB)Photograph: Graham Turner for the Guardian

Themed to celebrate one of Shakespeare's best-loved plays, A Midsummer's Rose festival is set to be one of the most popular crowd pleasers of this year's flower showPhotograph: Graham Turner for the Guardian

Musicians from Tyrrells Vegetable Orchestra claim to have formed the first ever vegetable orchestra. Including Rachel Clare on carrot and Simon Tong on courgette and pepper [this caption was amended on 6 July 2010. The original referred to the Royal Academy of Music. This has been corrected]Photograph: Graham Turner for the Guardian

Simon Tong, from Tyrrells Vegetable Orchestra, improvises a trumpet mute with half a pepper, as he plays through a courgettePhotograph: Graham Turner for the Guardian

A woman examines a display of Streptocarpus, raised by Lynne Dibley and exhibited here for the first time. It has been voted the 2010 RHS Chelsea flower show's plant of the yearPhotograph: Graham Turner for the Guardian

Dame Judi Dench is presented with a new rose in her honour, 'Drama Queen', presented by Bill Le Grice and Peter Beales as part of the Midsummer Rose festival at Hampton Court PalacePhotograph: Graham Turner for the Guardian

There are over a quarter of a million species of flowering plants. Of these, about 630 are known to be, like these plants, carnivorous Photograph: Graham Turner for the Guardian