Bleach
In the gaps and crevices of your walkways, do weeds tend to thrive? Try pouring over them with a bit of undiluted bleach. You may easily take them out after a day or two, and the bleach will prevent them from coming in. Just be careful not to get chlorine on the grass lining the walkway or plantings.
Boiling WaterDo you need to find out how your driveway or walkway will burn weeds? Heat up your kettle of tea. According to HouseLogic.com, pouring boiling water can burn stubborn weeds.
Borax
By sprinkling borax into all the crevices where you have seen weeds grow in the past, get the jump on those weeds that grow in the cracks of the concrete outside your home. Before they have a chance to take hold, it will finish them off. It will also prevent ants and other six-legged intruders from entering your house when used around the base of your home. But when adding borax, be very careful; it is harmful to plants.
Baking Soda
Looking for a secure way to prevent the growth of weeds and grasses in the cracks of your paved patios, driveways, and walkways? Sprinkle the concrete with handfuls of baking soda and simply sweep it into the cracks. The added sodium would make dandelions and their friends even less hospitable.
Fabric Landscape
The advantages of the fabric of the landscape? This all-natural technique takes longer than mulch to decompose. Don't just buy any type, though. Hold the fabric up to the sun and make sure that the fabric pores are small enough to avoid the growth of weeds through the barrier. A good-quality landscape fabric is also one you can't easily tear or stretch. Stiff, not flimsy and limp, it should feel.
Salt
It can be hard to remove those weeds that pop up in the cracks of your walkways. Yet salt will get the job done. Bring the solution to a boil with around 1 cup of salt in 2 cups of water. Pour the weeds directly onto them to kill them. Another similarly productive way of destroying weeds is to spray salt directly between patio bricks or blocks onto the weeds or unwanted grass. Sprinkle with water or just wait until the work for you is completed by rain.
Shower Curtains
Next time you do some landscaping with gravel or bark leaves, those old shower curtains will also come in handy. To prevent annoying weeds from poking through, just place the shower curtain underneath the mulching stuff. Although pests may be weeds.
Vinegar
In the cracks of your driveway or around the fringes of your patio, are dandelions sprouting up? By spraying them with full-strength white or apple cider vinegar, rendering them vanish for good. Offer each plant a single splash of vinegar in its middle section early in the season, or in the middle of the flower, before the plants go to seed. At ground level, place another shot close to the stem so the vinegar will soak down to the roots. Keep an eye on the weather, though; you'll need to send the weeds another spray if it rains the next day.