An herb spiral has a number of benefits: It can be built at little or no cost from readily available materials, it’s a good way in a limited amount of space to grow a variety of herbs that need different growing conditions, it’s easy to plant, tend and harvest, and it’s very attractive. Considering the high cost of culinary herbs, an herb spiral can pay for itself in its first season, and imagine having an abundance of delicious and aromatic herbs right in your yard!
This herb garden also lets us create a variety of microclimates. Some plants, such as many of the Mediterranean herbs, need dry, sandy soil conditions, while others require a moist, bottomland type of soil. The herb spiral accommodates these needs, as it is designed to have different soil conditions at different parts of the spiral. The top is a warm, dry area that gets plenty of sun. The bottom is cool, shady and moist. The middle is, well, in between the two. Herbs that need drier soil drain easily, and plants that desire moister conditions receive water that flows from above.