Belgian Mums (Live Plants ) Orange FLOWERSBelgian Mums are the finest breed garden mum on the market today with over 30 years of breeding and testing. They grow well in any container size from a market pack to a half bushel. Belgian Mums have a mounding habit, produces a multitude of blooms, branch better and more often than other mums. Mums can give you color until the cold comes. Heres how to make the queen of autumn gardens thrive. Mums grow best in full sun. They're at their best when