I fear I am a little impatient of the school of gardening that encourages the selection of plants merely as artistic furniture, chosen for colours only, like ribbons or embroidery silk. I feel sorry for plants that are obliged to make a struggle for life in uncongenial situations because their owner wishes all things of those shades of pink, blue or orange to fit in next to the grey or crimson planting.
Edward Augustus Bowles My Garden in Spring (1914)
If you don’t want to use chemical weedkillers, boiling water can be a simple alternative, particularly between pavers or on cracks or joins in concrete. The boiling water not only kills weeds instantly, it also sterilises the soil to reduce more weed seeds germinating in the area. However, don’t use it near the base of plants that you want to continue growing. Obviously you need to be extremely careful and avoid carting the hot water jug when you have pets or small children around. Wearing covered footwear is also a good safety precaution.