This cultivar is a
tetraploid sport of H. 'Summer
Serenade' registered by
Shady Oaks Nursery of Minnesota in 2007 and granted a U.S. patent in
The mound grows into a large size hosta about 21 inches in height and 2 feet in
width. Its leaves are slightly wavy and have thick substance.
Near white flowers bloom from late June into July.
The Hostapedia by Mark Zilis (2009), "This cultivar honors
Roy Klehm, highly respected nurseryman and long-time owner of Klehm Nursery
and Song Sparrow Perennial Farm. Through Roy's inspiration and
influence in the nursery trade, the sales of hostas achieved
unprecedented heights during the 1980s and 1990s."
Encyclopedia of Hostas (2009) states: "The leaf
color changes depending on the intensity of the light, being a deeper golden
yellow in strong sunshine...An exciting new sport which is thought to be
tetraploid...distinctively tipped rounded leaves and exceptionally pleasing
Similar cultivars include H. 'Cathedral
United States Patent: PP19647 (2009)
Abstract: A new cultivar of Hosta named ‘Roy
Klehm’, a chemically induced chimeral mutation of
Hosta ‘Summer Serenade’, that is characterized by
its unique variegated foliage with bright yellow-green
centers and wide deep green margins comprising about one
half of the leaf area. ‘Roy Klehm’ has an upright plant
habit with leaves held horizontal on upright petioles
and near white flowers held on erect flower scapes that
arise above the foliage in mid summer.