To kill the weed and its roots, mix a tablespoon of gin, a tablespoon of distilled white vinegar, a teaspoon of dish soap and a quart of water, then apply it to the weeds. To preserve the roots, mix one part distilled white vinegar to four parts concentrated lemon juice.
Pouring boiling water on weeds is an effective way to kill them. Rock salt or table salt can also be applied to eradicate invasive plants. Growing an abundance of strong, healthy plants is also an effective way to eliminate weeds naturally. Blocking sunlight by smothering weeds with newspaper or a box is another way to kill weeds using household items.