Hosta ‘Royal Standard’ Hosta plantaginea × H. sieboldiana (Grulleman/Wayside/AHS 1986) Type:hostasPerennials Hardiness:Zone 3 – 9 Mature Height:24-36in Light:part to full shade (4 hours or less sun)shade (northern exposure) Water:drought tolerantrequires regular watering Bloom Color:white Bloom Shape:trumpet Bloom Time:summer Foliage:green Description ‘Royal Standard’ was the first hosta to receive a plant patent in 1965. Plants form a large 26″ h x 63″ wide mound of slightly wavy, shiny green leaves. This old reliable produces beautifully fragrant pure white flowers in late summer.