Siebold's Campion
Lychnis sieboldii
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
24 inches
Width
12 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8
Water
Requires regular moisture
Humidity
Prefers moderate humidity
Lifespan
Perennial
Native To
Japan
Toxicity
Some species may be mildly toxic if ingested
The Story
Plant Bio
Lychnis sieboldii is a perennial herbaceous plant known for its upright clumps of finely textured, lance-shaped green foliage and clusters of small, star-shaped pink flowers that bloom in summer. This species is appreciated for its delicate flowers and ability to attract pollinators, making it a good choice for moist, partially shaded borders and woodland gardens.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds lightly into moist soil in early spring.
- Water regularly to keep soil evenly moist.
- Transplant seedlings when established after 6 weeks.
- Divide clumps every 3 years in early spring.
- Mulch to retain moisture and suppress weeds.
- Prune after flowering to maintain shape.
Pro Tip
Ensure consistent moisture for best flowering performance.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Deadhead spent flowers to encourage more blooms
- Apply a balanced fertilizer in spring
Don't
- Avoid letting soil dry out completely ❌
- Don’t cut back in late fall to prevent winter damage
- Refrain from over-fertilizing to avoid floppy growth
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Mulch | ||||||||||||
| Plant | ||||||||||||
| 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
Siebold's Campion questions
What zones can Siebold's Campion grow in?
Siebold's Campion 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 Siebold's Campion deer resistant?
Yes — Siebold's Campion is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Siebold's Campion bloom?
Siebold's Campion 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 Siebold's Campion need full sun?
Siebold's Campion does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Lychnis to compare
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Lychnis flos-cuculi 'Petite Jenny'
Lychnis x arkwrightii Orange Zwerg
Lychnis x arkwrightii 'Orange Zwerg'
Cuckoo Flower
Lychnis flos-cuculi 'Petite Henri'
Rose Campion
Lychnis atrosanguinea
Maltese Cross
Lychnis chalcedonica
Orange Sherbet Campion
Lychnis coronata 'Orange Sherbet'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Siebold's Campion 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.
