About fifteen minutes walk from where I live, there's a farmhouse/manor house dating back to the 16th century. The house itself is currently empty, but the courtyard and stables side of it is still used to house horses and the garden site is used by a local organic gardening group. Each May, they have a plant swap event, where you can swap seedlings etc or just pick up some of people's surplus plants, possibly for a small donation for a charitable cause. We went this weekend and managed to somewhat restrain ourselves in picking up plants - I only got two, my partner five.
The photo shows how nicely the gardening group has designed the vegetable garden, using plants and patterns from traditional farmhouse gardening, with a mix of vegetables and flowers.
The plant swap is where you can see all the people milling about. As you can see, it was a bit rainy that day.