Hosta Deep Blue Sea

Deep Blue Sea Hosta

Hosta 'Deep Blue Sea' — a medium-sized blue hosta prized for its thick, deeply corrugated blue-gray leaves and strong mounded habit. The broad foliage has excellent substance, holding its rich blue tone well through much of the season and offering very good slug resistance. Pale lavender flowers rise above the foliage in midsummer, adding soft seasonal color while the bold textured foliage remains the main ornamental feature.

Type: Perennial

Mature Size:
Width: 24–30 in
Height: 12–16 in (to ~22 in in flower)

USDA Zones: 3a–8b

Form: Dense, rounded mound

Light: Partial shade to full shade; best blue color in filtered shade

Soil: Moist, well-drained soils rich in organic matter

Water: Moderate; prefers evenly moist soil

Wildlife: Attracts hummingbirds and bees

Features & Landscape Uses:
A standout blue hosta for woodland gardens, edging, shade borders, and mixed hosta collections. Its heavy texture pairs especially well with gold hostas, white-variegated forms, and fine-textured ferns.

Care:
Maintain consistent moisture and mulch annually to keep roots cool. Protect from strong afternoon sun to preserve the blue leaf coating. Remove spent flower stalks after bloom and clean old foliage in early spring. Divide mature clumps every few years if needed. 🌿

Plant type

Perennial

Height

12-15''

Width

24-30"

Hardiness zones

3–8

Sunlight

Full Shade, Partial Shade

Growth rate

Moderate

Bloom time

Mid Summer

Flower color

Lavender

Fall color

Blue Green

Attracts

Bees, Hummingbirds

Soil

Moist well-drained, Rich

Landscape use

Accent Plant, Border, Container, Mass Planting

Shape

Dense, Mounded, Rounded

Drought tolerant

No