White Masterwort
Astrantia major 'Alba'
Not currently listed at our partner nurseries.
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
Moderate
Humidity
Prefers high humidity
Lifespan
Perennial
Native To
Europe, Asia
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Astrantia major 'Alba', commonly known as White Masterwort, features beautiful white flowers with prominent bracts, providing a delicate touch to gardens. This cultivar is particularly valued for its white blooms that can thrive in partial shade, making it a unique choice for woodland gardens.
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into moist soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity and promote root growth.
- Plant in well-draining soil enriched with organic matter in a partially shaded spot.
- Water consistently to keep soil moist but not waterlogged during active growth.
- Divide clumps every 3-4 years in early spring or fall to rejuvenate plants.
- Mulch around plants to conserve moisture and suppress weeds.
Pro Tip
Provide dappled shade in hot climates to prevent leaf scorch and encourage lush foliage.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil evenly moist 🌱
- Apply organic compost in spring for healthy growth
- Mulch to retain moisture and regulate soil temperature
Don't
- Avoid overwatering to prevent root rot ❌
- Don’t expose to full, harsh sunlight which can scorch leaves ❌
- Refrain from heavy fertilizing late in the season
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Plant | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
White Masterwort questions
What zones can White Masterwort grow in?
White Masterwort 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 White Masterwort deer resistant?
Yes — White Masterwort is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does White Masterwort bloom?
White Masterwort typically blooms in late spring to early summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does White Masterwort need full sun?
White Masterwort does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Astrantia to compare
Venice masterwort
Astrantia major 'Venice'
Great Masterwort
Astrantia major 'Sparkling Stars Pink'
Masterwort Star of Billions
Astrantia major 'Star of Billions'
Masterwort Burgundy Manor
Astrantia major 'Burgundy Manor'
Sparkling Stars White Masterwort
Astrantia major 'Sparkling Stars White'
Great Masterwort 'Claret'
Astrantia major 'Claret'
Keep exploring
Explore the genus
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Hardy in your zone?
Grow White Masterwort with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
