Not exactly natural, but Round-up makes a special solution for poison ivy. If this is growing amongst plants you don't want to kill, I would suggest you soak the soil (or wait for a day-long rain) and pull them up by the roots. Wear gloves and wrap strong trash bags around your arms. When you pull the plant up, pull it inside the bag by turning the bag inside-out. Seal and put everything, including gloves, in the trash. Do not burn. I've been exposed so much through the years that my body reacts terribly whenever I get exposed.
If you want to be extra careful, pre-treat yourself with Tecnu, then wash with Tecnu once completed. I can't vouch for it's effectiveness. Kinda hard to prove a negative.
If you want to be extra careful, pre-treat yourself with Tecnu, then wash with Tecnu once completed. I can't vouch for it's effectiveness. Kinda hard to prove a negative.