The National Trust and Yorkshire and Clydesdale Banks' A Plant in Time touring garden exhibition has won the best Green Event Award (shows/exhibitions) at the prestigious global Green Awards 2010 gala ceremony. The award was presented at the Natural History Museum in London.

Judging was based on the criteria of creativity, innovation, effectiveness of the communication campaign and media vehicles employed. The winning entries were the judges pick of the best global campaigns communicating sustainability.

'A Plant in Time' was an innovative, fun, inter-active exhibition, designed to raise awareness of climate change through looking at the implications for the National Trust's collection of 200 historic gardens.

Mike Calnan, National Trust head of gardens, said: "We are absolutely delighted to have won this major award and I would like to thank Yorkshire and Clydesdale Banks for their generous sponsorship, all the properties who hosted the exhibition and the thousands of visitors who enabled us to make A Plant in Time a reality.

"Everyone who contributed to or visited the exhibition saw how they could personally make a difference to how we care for our environment."

The centre piece for A Plant in Time was a spectacular display of colourful flowers made by visitors to the exhibition, which grew in size and impact as it toured across seventeen National Trust gardens over eight months this year.

Nearly 5,000 flowers were made by visitors, many accompanied by green living pledges written onto paper leaves and attached to a special pledge tree within the exhibition.

"Winning the best Green Event category confirms that small steps can lead to big changes," continued Mike Calnan.

"A Plant in Time explained the complexities of climate change through the familiar language of gardens and plants. The exhibition has helped people understand what's at stake if we don't act now and many have decided to live greener lives as a result," he concluded.