Poison ivy is a troublesome plant that can cause itching, pain and discomfort if you come in contact with it. This plant contains an oil called urushiul, which can cause itchy rashes and even extreme swelling in some people. The best way to prevent the effects of poison ivy is to avoid it, but this isn't always possible if the ivy grows in your yard. Fortunately, you can kill poison ivy with common materials that are likely already in your kitchen.
Mix the white vinegar, table salt and liquid dish soap in a spray bottle. Put the lid on the bottle and shake until all of the salt dissolves.
Spray the mixture directly on the poison ivy. Spray it on the leaves as well as the soil where the plant emerges. The soap will help remove the waxy surface on the leaves, making it easier for the salt and vinegar to get inside. The salt and vinegar naturally deprive the poison ivy of moisture.
Return to the area one week after the first application. If the poison ivy isn't completely wilted, spray another application of the weedkiller.
Check the area every two weeks to ensure the poison ivy does not grow back.