Groundcovers are a type of plant that hug the ground with their dense foliage. Some groundcovers spread and some form thick clumps. All groundcovers look best when planted in groupings. The "living mulch" effect when you plant a single variety of groundcover en masse is stunning!
In addition to being beautiful, Perennial Groundcovers are a fantastic way to control weeds. For example, do you have a shady bed with hostas and you'd like to fill in the gaps between plants? Give Lamium a try! It's low, beautiful, and not aggressive at all. If you have a sunny location that needs something, but you aren't sure what, how about a group of 'Rozanne' Geraniums (the purple flower plant pictured)? They're actually our longest blooming perennial!