o d Spiral and Mandala Fact Sheet Spiral Herb (or plant) spirals are a way of growing herbs together that have different requirements. It is an elevated spiral of soil held together with rocks or hardwood creating a diversity of conditions that is easy to water and harvest. Step 1 Choose a sunny spot, close to your kitchen or back door. Step 2 Place soaked cardboard over the ground to smother weeds. Larger rocks are used to build the base spiral shape. Step 3 Build up the layers of rock and add soil as you go. The top of the spiral can be up to a metre off the ground. Step 4 A small pond or water container can be placed at the bottom to catch run off. Step 5 Herbs with less water requirements, such as rosemary, sage, oregano and thyme can be planted at the top and/or on the northern side. Those that enjoy some shade can be planted on the southern side with moisture loving plants like water cress at the bottom.