Garden hybrid

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

298 other cultivars

perennial

Flemish Sky Hosta

Hosta x hybrida 'Flemish Sky'

The Story

Plant Bio

Hosta is a genus of shade-loving, herbaceous perennials grown primarily for their beautiful foliage. They form mounds of leaves that vary widely in size, shape, color, and texture, and produce spikes of lily-like, lavender or white flowers in summer.

Hosta 'Flemish Sky' is distinguished by its intense, powder-blue, heart-shaped leaves that are slightly wavy and of good substance. It holds its blue color well throughout the season and forms a dense, medium-sized mound.

Uses & Benefits:

Adds lush, variegated foliage to shaded gardens, providing visual interest year-round.

Helps suppress weeds in shaded borders, reducing maintenance.

Supports pollinators with late-summer flowers, although not specifically attractive to hummingbirds.

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

16 inches

Width

24 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Regular watering to keep soil moist

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 dormant roots into well-draining soil in spring.
Water regularly to keep soil moist but not soggy.
Mulch around base to retain moisture and suppress weeds.
Divide every 3-4 years in early spring for best growth.
Fertilize with a balanced slow-release fertilizer in spring.
Place in partial shade for optimal foliage color.

Pro Tip

Ensure soil remains consistently moist for vibrant foliage.

Keep It Thriving

Care Guide

Do

Water deeply during dry spells 🌱
Mulch to conserve moisture
Divide in early spring

Don't

Avoid full sun which can scorch leaves ❌
Do not let soil dry out completely
Avoid heavy, waterlogged soil

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded border with variegated foliageCool-toned groundcoverTextural accent in shaded garden beds

Companion Plants

Fern Astilbe HeucheraJapanese painted fern Ligularia

Multiply

Propagation Methods

Good to Know

Common Questions

Flemish Sky Hosta questions

What zones can Flemish Sky Hosta grow in?

Flemish Sky Hosta 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 Flemish Sky Hosta deer resistant?

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

When does Flemish Sky Hosta bloom?

Flemish Sky Hosta 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 Flemish Sky Hosta need full sun?

Flemish Sky Hosta does best in part shade.