several of my newer accts are in a new developement that has new trees planted along the curbs and common areas. they have been mulched in about a 3 foot diameter around and always have bermuda creeping into the mulch i have a hard time just trying to get a even circular shape with my string trimmer. lol. i have a stick edger. does that work any better? what is the best method to get a deep, clean, circular edge around these plantings? whoever does the common areas does a nice job and keeps that dang bermuda out of there. am i stuck with getting down on my knees and weeding them every week?