Garden hybrid

This is a garden hybrid, bred from more than one wild species, so it has no single species page of its own.

299 other cultivars

perennial

Hosta Sea Sapphire

Hosta x hybrida 'Sea Sapphire'

The Story

Plant Bio

Hosta x hybrida 'Sea Sapphire' is a perennial shade-loving plant featuring broad, lush, blue-green leaves with a slightly rippled texture and tall stems of lavender-blue bell-shaped flowers in summer.

This cultivar is prized for its striking silvery-blue foliage that provides excellent contrast in shaded garden beds and its relatively compact growth habit.

Uses & Benefits:

Provides lush, attractive foliage year-round, especially in shaded areas.

Suppresses weeds with dense growth, retains soil moisture.

Supports pollinators by providing shelter and nectar sources.

Garden hybrid

Bred from more than one wild species, so it has no species page of its own.

Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

24 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Consistent moisture, avoid drought stress

Humidity

Prefers moderate humidity

Lifespan

Perennial

Native To

Asia

Toxicity

Toxic to dogs, cats, and horses

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds or divisions into soil in early spring
Water regularly to keep soil moist
Fertilize with balanced fertilizer in spring and summer
Mulch around base to retain moisture and suppress weeds
Divide every 3-4 years in early spring or fall
Mist foliage during dry spells to prevent stress

Pro Tip

Plant in partial shade with well-draining, moist soil for best results.

Keep It Thriving

Care Guide

Do

Water regularly, especially during dry periods 🌱
Mulch to retain soil moisture
Divide every few years to promote healthy growth
Fertilize in early spring with a balanced fertilizer

Don't

Avoid full sun exposure which can scorch leaves ❌
Don't let soil dry out completely
Avoid heavy, waterlogged soil
Don't ignore pests like slugs and snails

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Pest Check
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded borderWoodland garden edge

Companion Plants

Ferns Astilbe Heuchera LigulariaJapanese painted fern

Multiply

Propagation Methods

Good to Know

Common Questions

Hosta Sea Sapphire questions

What zones can Hosta Sea Sapphire grow in?

Hosta Sea Sapphire is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Hosta Sea Sapphire deer resistant?

Not reliably. Deer may browse Hosta Sea Sapphire, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Hosta Sea Sapphire bloom?

Hosta Sea Sapphire typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Hosta Sea Sapphire need full sun?

Hosta Sea Sapphire does best in part shade.