But there’s a right and wrong way to do it. Purple markings have to follow specific rules to count legally. The paint must be applied in vertical lines, not random smudges or horizontal streaks. These stripes need to be at least one inch wide and eight inches long, so they’re visible from a reasonable distance. The marks should sit three to five feet off the ground — low enough to catch someone’s eye, but high enough not to be hidden by tall grass or brush.
Spacing also matters. Landowners are required to place the purple marks roughly every hundred feet along their property lines. The goal is to make it impossible for someone to cross the boundary without seeing at least one.
