Krossa Regal has a shape unlike most hostas: instead of a low mound, its frosty blue-green leaves rise on long stems into an upright, vase-shaped clump about 40 inches tall. The leaves are wavy along the edges and hold up well against slugs.
In mid to late summer it sends up exceptionally tall scapes, 4 to 6 feet high, lined with lavender flowers that draw hummingbirds. The leaves sometimes take on an orange-yellow tint in fall. Its height and form make it useful in the middle or back of a shady border and in large containers.
What it looks like
Long, lance- to heart-shaped leaves with wavy edges and a frosted, powdery blue-green surface, held upright on long arching petioles. The plant forms a tall, vase-shaped clump about 40 inches tall and 3 to 6 feet wide, narrower at the base and flaring at the top. In mid to late summer, very tall, slender scapes rise 4 to 6 feet with widely spaced lavender trumpet flowers along the upper stem. Leaves are thick with a matte finish. At peak the tall flower spikes tower well above the cool blue foliage.
Growing it with lavender
Hostas want shade and steady moisture, the opposite of lavender's hot, dry bed, so give this one a spot under trees or along the north side of the house with ferns and astilbe.
Care
Plant in part to full shade in rich, humus-heavy soil that stays evenly moist but drains well; water deeply during dry spells, especially the first summer. Hardy in zones 3-9. Cut spent scapes after bloom and divide crowded clumps in early spring as the shoots emerge.
At a glance
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Botanical name: Hosta
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Flower color: Lavender
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Foliage: Frosty blue-green
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Growth habit: Upright, vase-shaped clump
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Mature size: 40 in tall × 36 in–6 ft wide
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USDA hardiness zones: 3–9
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Light: part sun to part shade, full shade
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Bloom start: Mid-July
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Peak bloom: Early-August
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Bloom pattern: Single Flush
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Deer resistance: Susceptible
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Pollinator value: Great
Sizes and shipping
Dormant bare-root plant, sold in boxes of 25 per variety (order in multiples of 25). Bare-root plants ship or are picked up March 1–May 31 only. They are soil-free, so they may ship to every state in that window. Dormant plants often show little or no top growth on arrival; plant or heel them in promptly.