Herb spirals are a vertical garden design - a highly productive and energy-efficient way to grow food whilst maximising space. Herbs are the perfect plants for spiral gardens as they have a variety of requirements with regards to water, light and space, and the spiral will offer varying conditions to suit.
This type of garden utilises the natural force of gravity, allowing the water to drain down through the layers. This creates a moist area near the bottom and drier zones at the top. Microclimates are created, providing a range of conditions for different plants and their needs.