Why the traditional garden spade might be damaging your soil
For generations, gardeners believed digging was essential for new beds. However, modern science suggests that turning the earth actually destroys the very networks that sustain life. A simple alternative using only cardboard and compost can transform a patch of weeds into a thriving, carbon-rich ecosystem.
Traditional cultivation methods, such as digging, forking, or using a rotavator, do more than just move earth; they disrupt the delicate architecture of the soil. According to the Royal Horticultural Society, digging damages soil structure by breaking up natural drainage channels created by worms and disturbing vital fungal networks. Furthermore, this disturbance releases carbon that was previously locked safely within the soil, making the no-dig method a more climate-positive choice.
The no-dig approach relies on suppressing weeds and building organic matter rather than mechanical intervention. To start a new bed from a patch of grass or weeds, you can lay a double layer of overlapping cardboard over the ground. It is important to remove staples and tape, and to avoid shiny printed cardboard. Once the cardboard is in place, weight it down with a thick layer of organic matter, such as compost, typically between 10cm and 15cm deep.
This method is highly effective for both edible and ornamental plants. By adding organic matter and reducing cultivation, plants can access nutrients through the action of soil-dwelling organisms, often reducing the need for external fertilisers. While you can plant into a new bed immediately if the mulch is well-rotted, the cardboard serves to suppress weeds. For the best access, gardeners often design beds around 1.2m wide, with paths approximately 45cm wide to minimize the need for mowing.
Source: Make Your First No Dig Bed | Start Growing Your Own Food | No Dig Day 2025
