Ornamental grasses are now common sights at nurseries and garden centers, but that hasn’t always been the case. One of the earliest advocates of incorporating native and ornamental grasses and grass-like plants into American gardens was horticulturist and landscape designer John Greenlee — a well-known and respected expert in grass ecology known as the “Grassman” or “Grass Guru,” among other monikers —  and he’s my guest on the podcast this week.