Mazus Your ultimate guide to Mazus: Everything you need to know with expert info for beginners and advanced gardeners alike. Mazus Groundcover: Growing Mazus Reptans In The Garden Mazus ground cover is a tiny perennial plant, growing only two inches tall. It forms a dense mat of foliage that stays green throughout spring and summer, and well into fall. In the summer, it is dotted with tiny blue flowers. Learn to grow mazus in this article.