Hosta 'Krossa Regal': Upright Vase-Shaped Blue Giant

Hosta 'Krossa Regal': The Regal Vase-Shaped Blue Hosta

Hosta 'Krossa Regal', hybridized by Krossa-Krossa and introduced in 1980, is unique among giant hostas for its distinctive upright, vase-shaped habit. Instead of arching outward, the leaves rise vertically, creating a striking architectural form crowned with tall flower scapes. Its powder-blue foliage adds to the regal impression.

Architectural Vase Form

The leaves are large, 10–12 inches long, 8–10 inches wide, broadly ovate, with a waxy blue-gray coating. They are held upright in a tight vase shape, creating a columnar silhouette 3 feet tall and 2–3 feet wide at the base, widening to 4–5 feet at the top. The flower scapes are exceptionally tall—5–6 feet—bearing lavender flowers in midsummer, rising well above the foliage.

Unique Habit and Utility

The upright habit makes 'Krossa Regal' invaluable for tight spaces, narrow borders, and as a vertical accent. It tolerates more sun than many blue hostas (morning sun enhances the blue). Good substance provides slug resistance. Hardy in USDA zones 3–9. The tall scapes are a signature feature.

Taxonomic Profile

• Family: Liliaceae
• Genus: Hosta
• Cultivar: 'Krossa Regal'
• Hybridizer: Krossa-Krossa
• Introduced: 1980

Vertical Accent Master

'Krossa Regal' brings architecture to the shade garden. Use as a focal point, in a row for a living colonnade, or combined with mounding plants for contrast. The vase shape and tall scapes create a sense of height and drama. A hosta that defies the typical mounding habit with regal distinction.