A keyhole garden is a type of raised bed gardening system designed to maximize space, conserve water, and promote sustainable gardening practices, especially in arid or resource-constrained regions. The name “keyhole” comes from its unique shape, you could try here resembling a keyhole when viewed from above.
The design typically consists of a circular or rectangular raised bed with a notch or “keyhole” indentation on one side. The circular shape is more common, as it allows for easier access to all parts of the garden from a single point.
Features of a keyhole garden
Key features of a keyhole garden include:
- Raised bed. The garden is constructed in a raised bed, which is usually around waist height. It makes it easier for gardeners to access and tend to plants without bending over, which is particularly helpful for those with physical limitations.
- Composting tower. At the center of the circular garden, there is a composting tower or basket made of wire mesh or other suitable materials. The tower serves as a compost bin, where kitchen scraps, vegetable peelings, and other organic waste can be deposited. As the compost breaks down, nutrients are released into the surrounding soil, providing nourishment to the plants.
- Efficient watering system. The key feature of a Keyhole garden is its water-saving design. The composting tower at the center allows for easy access to water the plants. Greywater, or water used for washing dishes or other non-toxic household purposes, can be poured into the composting tower, effectively recycling water and reducing water wastage.
- Layered structure. Keyhole gardens are typically constructed with layers of different materials. At the bottom, there may be rocks or gravel for drainage, followed by a layer of cardboard or newspaper to suppress weeds. Above this, layers of soil, compost, and organic matter are added to create a fertile growing environment for plants.
- Easy accessibility. The circular shape of the garden with the keyhole indentation allows gardeners to reach all areas of the bed without having to step on the growing area, which can compact the soil and harm the plants.
Keyhole gardens are especially popular in regions with limited access to water or where fertile soil is scarce. The composting system helps enrich the soil, and the efficient watering technique reduces water usage. They are an ingenious and sustainable way to grow vegetables, herbs, and flowers while promoting recycling and waste reduction.
Sources of water and soil are two essential factors in gardening. The lack of those factors is not a problem with a keyhole garden.