perennial

Masterwort Star of Billions

Astrantia major 'Star of Billions'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun, Partial Sun, Shade

Zones

4, 5, 6, 7

Water

Consistently moist

Humidity

Moderate to high

Lifespan

Perennial

Native To

Europe and Asia

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

Astrantia major 'Star of Billions' is a perennial plant featuring clump-forming growth with distinctive star-shaped flowers and deeply divided, fern-like foliage. The flowers are composed of numerous small, pinkish-white florets surrounded by prominent bracts. This cultivar is celebrated for its prolific, dense floral display and long-lasting blooms, making it a striking addition to shaded borders and woodland gardens.

Uses & Benefits:

Adds a splash of color and texture to shaded garden areas, attracting pollinators and providing visual interest in late spring and fall.

Prefers moist, well-drained soil, making it ideal for rain gardens and shaded borders that retain moisture.

Supports beneficial insects and pollinators, enhancing garden biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds in moist soil in early spring.
Water regularly to keep soil consistently moist.
Apply mulch to retain moisture and suppress weeds.
Divide plants every 3-4 years in early spring.
Deadhead spent flowers for prolonged bloom.
Transplant in early spring or fall for best results.

Pro Tip

Prefers consistently moist, humus-rich soil for vibrant blooms.

Keep It Thriving

Care Guide

Do

Water deeply during dry spells 🌱
Mulch annually to conserve moisture ❌
Deadhead to encourage more flowers 🌱
Divide every 3-4 years in early spring 🌱

Don't

Avoid dry, well-drained soils ❌
Do not let soil dry out completely ❌
Overcrowd plants to prevent airflow issues ❌
Skip deadheading which reduces flowering 🌱

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shady woodland borderMoist herbaceous borderShade-loving perennial bed

Companion Plants

Fern Hosta Astilbe Ligularia Hakonechloa

Multiply

Propagation Methods

Good to Know

Common Questions

Masterwort Star of Billions questions

What zones can Masterwort Star of Billions grow in?

Masterwort Star of Billions is hardy in USDA Zones 4–7. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Masterwort Star of Billions deer resistant?

Yes — Masterwort Star of Billions is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Masterwort Star of Billions bloom?

Masterwort Star of Billions typically blooms in late spring to mid-summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Masterwort Star of Billions need full sun?

Masterwort Star of Billions does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.