I occasionally trim poison ivy that grows over from a neighboring property and I learned about jewelweed as a child growing up in the 1970’s. I used to drive to the woods afterward to rub jewelweed on my skin when needed but several years ago I planted jewelweed in a wild part of my backyard. I don’t mind that it invades the grass because it creates a nice layer of orange flowers throughout the summer. If I touch poison ivy, I harvest a jewelweed plant above the root within an hour, slice open the juicy stem and rub it on the skin like soap. This chemically neutralizes poison ivy to prevent a rash. Jewelweed grows in low lying wooded areas so it is usually easy to find if you touch poison ivy while hiking in an unfamiliar area.