Siberian False Lupine
Thermopsis fabacea
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
21 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
Siberia, Japan
Toxicity
All parts are toxic if ingested
The Story
Plant Bio
Herbaceous perennial with trifoliate, clover-like, blue-green leaves and upright spikes (racemes) of bright yellow, pea-like flowers that bloom in late spring to early summer. This species is valued for its vigorous growth and resistance to drought, making it an excellent choice for low-maintenance, sunny borders and slopes.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds directly into prepared soil in early spring.
- Mist cuttings regularly to maintain humidity and promote rooting.
- Water consistently during first growing season to establish roots.
- Divide clumps every 3-4 years in early spring or late fall.
- Mulch to retain moisture and suppress weeds.
- Transplant in early spring or fall for best results.
Pro Tip
Ensure well-draining soil and full sun for optimal growth.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Mulch to conserve soil moisture
- Prune after flowering to maintain shape
Don't
- Overwater to prevent root rot ❌
- Avoid fertilizing in late fall
- Do not disturb roots during peak flowering
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prune | ||||||||||||
| Stake |
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
Siberian False Lupine questions
What zones can Siberian False Lupine grow in?
Siberian False Lupine is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Siberian False Lupine deer resistant?
Yes — Siberian False Lupine is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Siberian False Lupine bloom?
Siberian False Lupine typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Siberian False Lupine need full sun?
Siberian False Lupine does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Siberian False Lupine drought tolerant?
Yes — once established (usually after the first full season), Siberian False Lupine handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow Siberian False Lupine 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.
