Hosta x Royal Standard is a large hosta resulting from a cross between H. plantaginea and H. sieboldiana. It grows in a mound to 26″ tall but spreads to 63″ wide. Narrow, oval, bright medium green leaves (to 9″ by 5″) with a satiny sheen have faint marginal undulations, distinctive veining, acute tips and cordate lobes. Leaves of this cultivar are sun resistant and acquire yellowish-green tones in full sun. Highly fragrant, with funnel-shaped, white flowers, thanks to its H. plantaginea heritage, it blooms in late summer to fall on leafy, pale green scapes rising well above the foliage mound to 42″ tall. U. S. Plant Patent PP2467 was issued on January 19, 1965. Grulleman and Wayside 1986.

A Northern Sunset Perennial, it prefers rich, well-drained to moist soil in part shade to part sun.