Weeds flourish during summer when mild temperatures and rainfall create ideal conditions for growth and seed germination. Common types such as dandelions, daisies, bindweed, and ground elder are easy to recognise by their characteristic leaves and flowers, making them hard to ignore.
Natural Weed Control Solutions
For those who avoid chemical weed killers, white vinegar, baking soda, salt, and boiling water are often suggested, yet they do little to address demanding aspects of weed removal like pulling and spraying. One gardening expert has proposed a hands-free approach called sheet mulching.
Professional landscapers have used this method for years, but it remains a revelation for the average home gardener seeking to maintain beds and borders. Elizabeth Florio of Garden & Gun said: "It turns out the cardboard that passes through households in abundance is a low-fuss, good-for-the-soil, sustainable-many-times-over weed barrier."
How Sheet Mulching Works
The method is simple: position a flattened cardboard box over patches of weeds and cover with garden mulch. According to the gardening expert, this works by "smothering the undergrowth" while simultaneously enriching the soil with carbon, reports the Express.
It is a valuable choice for gardeners who prefer a no-dig strategy, and many have deployed it to excellent effect. A gardening enthusiast posted on the Charles Dowding forum that they found cardboard to be an "amazing" solution for controlling various garden weeds.
The forum member said: "Under hedges I put cardboard with wood chip on top, nothing through at all. We also had a weed-ridden border which I put cardboard first, then planted heather into holes cut in it, then put peat compost all over as mulch and it is doing well, heather alive and had to pull about two weeds in two months."
Killing Weeds with Cardboard
There is no need to clear existing weeds before placing cardboard over them. Many Charles Dowding forum participants maintain that removing them simply promotes additional weed growth. Instead, they suggest trimming them down and letting the upper layers compress them.
Particular types of cardboard work best for garden applications. Gardeners should opt for plain brown cardboard with limited printing and avoid shiny materials that might contain plastic coating or wax. The same applies to pieces with adhesive tape attached, which is why pizza boxes are generally regarded as the safest choice.
Elizabeth suggests overlapping flattened boxes for optimal weed prevention. Spraying them with water is also recommended to help the cardboard conform to the soil and stay securely positioned. If you are looking to plant directly on top of the cardboard layer, you will need to add a layer of compost and planting soil. Then simply spread your preferred mulch — be it wood chips, pine straw, or other organic materials — directly onto the cardboard.
