Pouring boiling water directly onto patio weeds is a simple, chemical-free way to kill them down to the root. The heat destroys the plant's enzymes, causing it to wilt and die within a day or two.
Why weeds are tough in late August
As summer ends, weeds flourish, developing deep root systems that make them stubborn to remove. Dandelions, for example, grow roots well before leaves appear, so pulling them often leads to regrowth within weeks. Patio weeds are especially tenacious because the gaps between slabs stay warm and damp, encouraging deep root growth.
The boiling water method
Sophie Webb, creator of What Sophie Does, recommends boiling water as the simplest and cheapest solution. She said: "Boiling water is one of the simplest, cheapest and most effective ways to get rid of weeds growing through the cracks in your pavement or paths."
She added: "Just pour it directly onto the weeds and the heat destroys the plant right down to the root with no harsh chemicals, no expensive products, and no harm to the environment. Perfect for driveways, patio edges and garden paths."
Weeds break down at temperatures around 100°C, so boiling a kettle and pouring the water over them is usually enough. The process takes about 10 minutes and costs nothing.
Drawbacks and tips
It may take a day or two for weeds to fully die, and deep-rooted weeds may need several applications with more water. Boiling water is more reliable than remedies like vinegar, bicarbonate of soda, or salt.
To use the method, fill a kettle, boil it, and carefully carry it outside. Clear your path and keep children and pets away. Pour slowly to avoid splashing, and take care not to burn yourself or nearby plants. Once the weeds wilt and turn brown, sweep them up and bin them.
