"It wouldn't be torn down. If you sprayed this your squirrels, your birds and porcupines whatever aren't gonna pull it down," Roger Boston of Ace Hardware said.
Markings must be at least eight inches long and an inch wide, and they should be placed between three and five feet off the ground. There should be no more than 100 feet in between purple markings along a property line.
When marking their property, not just any old shade of purple will do. In order to give potential trespassers a fair and legal warning, people need to use commercially available no hunting paint or tape.
Governor Tom Wolf signed off on the law several months ago, and it is now in effect.
Boston said hopefully word will spread before the fall when they typically get a surge of people shopping for supplies to mark their land.
"I think it needs to be brought to their attention that this is something new that we're doing and that it is legal," Boston explained. "Just as legal as a posted sign to have only this paint on the tree because it's gonna be new and people aren't gonna pay too much attention."
The law does not apply in Philadelphia nor Allegheny counties.