Garden Marker Rock Painting Ideas. Painted rocks are a great idea to use in your herb garden to identify what you planted and are much prettier than the little tags that come with the plant. Rock garden markers also bring a nice pop of color to your garden! 50+ Super Fun And Creative Rock Painting Ideas - Smart Fun DIY Please note: You are currently browsing img medium hand painted medium garden rock for grandma special that is 570x427px in size. This image is listed in garden rock painting ideas category. 50 Super Fun And Creative Rock Painting Ideas Smart Fun DIY, 570x427 in 135.24 KB.