Chur, in the Grisons, is renowned as the oldest town in Switzerland, with its historical heart still intact. Between the narrow streets, painted houses and old churches, no-one would expect to come across a large garden laid out in the formal French tradition, as at Versailles.

In Riehen, near Basel, we discover a garden that is truly tiny. In an area that's home to a large number of terraced houses little space is left between them. A quick look at the little front garden and it is immediately obvious whether the occupant enjoys gardening or not...

Rossinière is a charming Alpine village in the Vaud, with its attractive chalets so typical of the Pays-d'Enhaut. Nearly six hundred people live here and a large number of them obviously have very green fingers. The garden we have come to discover lies in the alpine meadows above the village...

We head for Gossau, in the canton of Saint-Gallen. One of the largest municipalities in western Switzerland it is not only home to some sublime painted houses but also a vast biblical garden with more than a hundred different plants.

We discover a magnificent garden in Neuenhof, in the canton of Aargau, a municipality that grew from a small farming village to an urban agglomeration. Despite the many modern houses and blocks of flats, some farms remain in the old district of the town, where we meet a fuchsia enthusiast...

In the canton of Berne, we discover a village that has retained its agricultural character despite the major motorway route nearby. A community with plenty of impressive farms, traditional houses, cow-sheds and farmyards... Each has its own large garden, but Katharina is attracted by one of them in particular.

Soleure, a town where the baroque style remains ever-present and where the age-old tradition of Swiss gardening still flourishes. The Gorges de Sainte-Vérène shelter part of this heritage along with the Hermitage of the same name. The pathway wending its through has been designed in the informal English garden style...

In the canton of Le Tessin, southern Switzerland, Katharina visits the village of Gudo to discover a garden where nature appears untamed. From small cacti to large shrubs, rhododendrons and the rare magnolia insignis, the garden is home to an incredible number of plants.

In Wuppenau, in the canton of Thurgau, Katharina visits a natural garden where indigenous plants and animals have taken control. The pathways allow water to soak through and no artificial fertiliser is used. Campanula grow happily next to wild plants and a riot of roses.

In Münsingen, in the canton of Berne, Katharina visits a community garden, a garden open to all those who love gardening. The aim: to harvest quality vegetables and flavoursome fruit but also to create a community experience. A place where everyone and every age can meet together.

Over a period of three months, Katharina Locher travelled Switzerland to discover its most extraordinary gardens, meeting those who created them and who care for them. Today Katharina Locher has brought these passionate enthusiasts together to look back over the programme and discuss the issues raised.

Katharina Locher heads off to the canton of Solothurn, a forested region of northern Switzerland. In a fairy-tale landscape, she invites us to discover an artist's garden, as magical as it is surprising...

In the village of Oberrieden, on the shores of Lake Zurich, Katharina Locher invites us to discover a veritable little gem. It's not only the size of the garden that makes it so unusual, but also its situation: right in the heart of an agricultural area. A rare setting for an ornamental garden.

Strolling through the streets of old Berne, it's difficult to imagine that nearby grow a plethora of fruit, trees and vegetables. From the Cathedral Square, you can just make out a large city garden below. An area of greenery that is open to anyone who wants to come and garden.

We're off to the canton of Grisons, in a valley known for its innumerable villages perched high on the hillsides. The village of Rothenbrunnen hides an idyllic garden, a little area of mountain nestling between the houses.

Böckten, in the canton of Basel-Landschaft. A small village of eight hundred souls, and a very unusual garden, the fruit of a close collaboration between an artist and an architect.

To the mountains! Below the Strela Pass, in the Grisons, lies a unique alpine garden. At a height of 1,900 metres, this botanical garden is perched just above Davos, the highest town in Europe. Known as the Alpinum Schatzalp, it is home to an impressive number of high altitude plants.

Welcome to Hauterive Abbey. An imposing monument, it was built some nine hundred years ago on the banks of the River Saane, near Fribourg, in a landscape enclosed by a sandstone cliff. This baroque building is today home to eighteen Cistercian monks who care for a superb garden

In Sutz-Lattrigen, on the shores of Lake Biel, lie some truly beautiful gardens. The gateway to one of them is hidden by an imposing bamboo forest. As soon as you enter, you are immediately transported to a tropical jungle.

Here in the canton of Nidwalden, the hills are covered by scattered farms. We meet a couple who both cultivate and garden with all their heart and soul. She is an artist, he is an architect and together they form a very creative duo.

The canton of Thurgau is sometimes described as the orchard of Switzerland. We visit a garden whose owners turned it into a space for living, a veritable outdoor sitting room.

Kurt Aeschbacher and Katharina Locher meet up in Zurich, accompanied by all those who had opened their garden gates, presented their planting and revealed their secrets.

Collecting, testing, discovering new species, redesigning and adapting, gardening has become an all-consuming passion for Herbert Frei, retired teacher.

Yvonne and Thomas Schindler are relatively new gardeners. It was when they moved into a watermill, nestling in a garden with all the romance of a fairy tale, that they discovered a real enthusiasm for gardening. In five years, they've created an idyllic garden filled with authenticity and originality.

It was a trip to England that sealed Sämi and Liselotte Buess's love for plants and gardening. On their 2,100-m² plot they have now created a veritable paradise, combining kitchen garden, rose walk, flowering meadows, stone walls and English-style borders.