Originally Posted by NattyLawn
You need a license in PA if someone is paying you to apply materials. You need to pass a Core and Category 7 test to get the ball rolling. The tests are offered at different times at your local county extension office. The core test is closed book and more common sense, and the Cat 7 test is open book. Look here for more info:
It looks like they offer pre-certification courses now.....IMO, the tests aren't difficult.
I knew the PA folks would step in, thanks natty