Yezo Jacob's Ladder
Polemonium yezoense 'Purple Rain Strain'
Essentials
At a Glance
Plant Type
Perennial
Height
18 inches
Width
12 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8
Water
Consistently moist, well-drained soil
Humidity
Moderate
Lifespan
Perennial
Native To
Japan, Korea
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Polemonium yezoense, commonly known as Yezo Jacob's ladder, is a perennial herbaceous plant characterized by its fern-like foliage and clusters of bell-shaped, purple flowers arranged along upright stems. The 'Purple Rain Strain' is distinguished by its deep purple-bronze, fern-like foliage, which is most vibrant in spring and provides a striking contrast to its clusters of lavender-blue to purple, bell-shaped flowers.
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into moist soil in early spring.
- Keep soil consistently moist but not waterlogged.
- Place in partial shade for best growth.
- Fertilize lightly in early spring with a balanced fertilizer.
- Mulch around the base to retain moisture.
- Divide clumps every 3–4 years in early spring.
Pro Tip
Ensure soil remains moist and provide partial shade for optimal growth.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Mulch to retain soil moisture
- Divide every 3–4 years for renewal
Don't
- Avoid dry or overly sunny locations ❌
- Don't let soil dry out completely
- Avoid heavy, compacted soils
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
Yezo Jacob's Ladder questions
What zones can Yezo Jacob's Ladder grow in?
Yezo Jacob's Ladder 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 Yezo Jacob's Ladder deer resistant?
Yes — Yezo Jacob's Ladder is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Yezo Jacob's Ladder bloom?
Yezo Jacob's Ladder typically blooms in late spring to early summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Yezo Jacob's Ladder need full sun?
Yezo Jacob's Ladder does best in part shade.
More Polemonium to compare
Heavenly Habit Jacob's Ladder
Polemonium boreale 'Heavenly Habit'
Royal Jacob's Ladder
Polemonium carneum
Jacob's Ladder Golden Feathers
Polemonium reptans 'Golden Feathers'
Jacob's Ladder Stairway to Heaven
Polemonium reptans 'Stairway to Heaven'
Jacob's Ladder Touch of Class
Polemonium reptans 'Touch of Class'
Heaven Scent Jacob's Ladder
Polemonium 'Heaven Scent'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Yezo Jacob's Ladder 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.
