The most popular gardening event of the year comes to the NEC in Birmingham.

Follow the progress of Carol Klein's gardening class as the show revisits the three pupils she took under her wing in 2009.

There's another chance to see highlights of the class and find out how each one has developed new horticultural skills.

Throughout the spring and summer all three amateur gardeners paid weekly visits to Glebe Cottage in Devon where Carol taught them the basic propagation and planting skills, as well as passing on some of her own trade secrets.

Garden designer Joe Swift pays a return visit to Birmingham couple Mark Amphlett and Suzanne Raynor, to find out if the garden he helped them design and build has grown into the space they always wanted.

Throughout the year Joe has been helping Mark and Suzanne transform their back garden from an overgrown space into a stylish family garden. With two young children, the couple wanted a design that was elegant but practical.

So six months after their first meeting it is time for Joe to look back over the year to see how the garden progressed from early drawings to final planting schemes. He also talks to Mark and Suzanne about how they have found the experience and what plans they may have for the rest of their outdoor space.

Toby Buckland introduces a special programme following a year in the lives of passionate gardeners Tony and Marie Newton. Seventeen years ago the couple began transforming their traditional suburban garden in Walsall, West Midlands into a stunning Yellow Book garden. Tony hated weeding but loved building things. Marie loved plants. Together they began an incredible journey to create their dream outdoor space.

Gardeners' World spent a year with Tony and Marie to discover why they are so passionate about their garden and to reveal the lengths to which they will go to achieve their perfect garden.

In 2009 Gardeners' World left its Warwickshire home to move to a brand new garden. Greenacre was the programme's first inner city garden and for presenter Toby Buckland that meant the challenge of creating a stunning garden from a former playing field.

Twelve months on and Toby's garden is taking shape. With new projects planned for 2010 it's time for Toby to reflect on the incredible journey the garden has made.

Toby looks back at his favourite moments during Greenacre's first year - from the creation of a stunning twilight border to tips on encouraging wildlife and the first successes of the vegetable gardens.

Monty Don, Alan Titchmarsh and a host of other celebrity gardeners look back on the programme that has become a national gardening institution. This one hour celebration takes a nostalgic walk down memory lane concluding that for the Great British gardener Friday nights mean a date with Gardeners' World.

Garden designer Joe Swift has a dream of city streets completely dominated by nature. But with Britain’s green space actually being relentlessly squeezed, it takes the vision of France’s pioneering botanist and designer Patrick Blanc to offer a truly original solution with his unique and stunning vertical gardens or ‘murs vegetals’. Joe believes these gorgeous living tapestries offer hope even where there are no grounds for gardening.

Carol Klein is addicted to plants. The former nursery woman and Gardeners’ World presenter has been passionate about them since she was a small child. In this nostalgic journey, Carol retraces her life through the plants that have meant the most to her, meeting friends who share her obsession.