Dandelions (Taraxacum officinale) can be a pest in your yard, garden or between cracks in your patio. These perennials grow in U.S. Department of Agriculture plant hardiness zones 3 though 9. Hand-pulling can remove the problem temporarily, but they reseed and grow back quickly. It's not necessary to use chemical herbicides to kill dandelions. Home remedies work just as well when applied correctly. Commonly used and inexpensive household products can be used to kill dandelions without spreading toxins through your landscape.
Boiling Water Method
Boil a kettle of water.
Pour the boiling water onto the dandelions to kill them. This works best for small areas, such as cracks in patios or walkways.
Repeat the process as often as need to kill any regrowth.
Fill a spray bottle with 3 parts white vinegar and 1 part dish detergent. White vinegar without dish detergent also works, but the detergent helps the vinegar stick to the leaves.
Spray the dandelions thoroughly with the vinegar mixture. Spray the plant and the soil.
Reapply the vinegar once every month unless dandelions and weeds are the only plants growing in the area.