The Story
Plant Bio
Triteleia laxa, Ithuriel's spear, is a cormous perennial from the grasslands and open woodland of northern California, fifteen to twenty inches tall. Leafless stems carry loose umbels of funnel-shaped flowers in very late spring, violet-blue to white with a darker stripe running down each segment. The grassy foliage dies back as the buds open.
It is built for a dry summer: the corms want steady moisture through winter and spring, then heat and no water at all once the leaves yellow. That makes it a natural partner for Mediterranean and gravel planting and a poor choice for an irrigated border. Native bees work the flowers, which also last well cut.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Bulb Corm Tuber
Height
18 inches
Width
12 inches
Light
Full Sun, Partial Sun
Zones
5, 6, 7, 8, 9
Water
Low
Humidity
Average
Lifespan
Perennial
Native To
Northern California
Toxicity
No significant toxicity reported
Planting
How to Grow
- Plant corms three inches deep in autumn.
- Choose free-draining soil in full sun or light shade.
- Space them three to four inches apart in generous groups.
- Let winter and spring rain do the watering.
- Stop watering once the foliage yellows after flowering.
- Leave clumps undisturbed to build up over several years.
Pro Tip
Plant it through low gravel or among grasses; the leaves die back at flowering and the bare stems look better rising through something.
Keep It Thriving
Care Guide
Do
- Plant corms in autumn for late spring flowers 🍂
- Give it a dry, baking summer rest ☀️
- Plant in groups of a dozen or more 💜
- Cut stems for the vase, they last well ✂️
Don't
- Irrigate the site through summer ❌
- Plant into heavy soil that stays wet ❌
- Cut the foliage away before it yellows ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant | ||||||||||||
| Rest |
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
Ithuriel's Spear questions
What zones can Ithuriel's Spear grow in?
Ithuriel's Spear is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Ithuriel's Spear deer resistant?
Yes — Ithuriel's Spear is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Ithuriel's Spear bloom?
Ithuriel's Spear typically blooms in late spring to early summer through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Ithuriel's Spear need full sun?
Ithuriel's Spear does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Ithuriel's Spear drought tolerant?
Yes — once established (usually after the first full season), Ithuriel's Spear handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Triteleia to compare
Keep exploring
Explore the genus
Hardy in your zone?
Grow Ithuriel's Spear 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.