Flower profile

Large-flowered triteleia

Triteleia grandiflora

Large-flowered triteleia (Triteleia grandiflora) is a flowering plant in the Asparagaceae family, native in the lower 48 states, blooming mostly April–June across the U.S.

Native in the lower 48

Large-flowered triteleia is a wildflower that USDA PLANTS lists as native in the lower 48 states. It's on our flower lists for 3 states, and across the U.S. it's most often seen in bloom in April–June.

8states where USDA records it

3Bloomipedia state lists include it

4,427U.S. sightings*

*iNaturalist research-grade observations, as of October 17, 2026.

On our lists for: Idaho, Montana, Washington

Quick look

Triteleia grandiflora is a species of flowering plant known by the common names largeflower triteleia, largeflower tripletlily, and wild hyacinth.
From Wikipedia's article Triteleia grandiflora, CC BY-SA 4.0.

It belongs to the Asparagaceae family. ^iNaturalist
USDA PLANTS describes it as an herb (forb) with a perennial life cycle. ^{USDA PLANTS}
USDA PLANTS lists it as native in the lower 48 states and records it in 8 states. ^{USDA PLANTS}
NatureServe lists it as native to Washington, Idaho and Montana. ^NatureServe
In Washington, most iNaturalist sightings of it in flower come in April–May. ^iNaturalist
In Idaho, most iNaturalist sightings of it in flower come in May–June. ^iNaturalist
USDA PLANTS lists its flower color as blue. ^{USDA PLANTS}
USDA PLANTS gives its bloom period as mid spring. ^{USDA PLANTS}
USDA PLANTS lists a mature height of about 2 ft. ^{USDA PLANTS}
iNaturalist has 1,967 research-grade sightings of it in Washington, ranking #101 among the 187 flowers on our Washington list. ^iNaturalist
iNaturalist has 704 research-grade sightings of it in Idaho, ranking #36 among the 143 flowers on our Idaho list. ^iNaturalist
iNaturalist has 473 research-grade sightings of it in Montana, ranking #97 among the 128 flowers on our Montana list. ^iNaturalist

When does it bloom?

Flowering records by month across the U.S. (iNaturalist research-grade observations marked “Flowering”) (2,044 records)

Bloom time in the 3 states whose Bloomipedia list includes it

State	Type	Peak bloom	Sightings*
Washington	Native	April–May	1,967
Idaho	Native	May–June	704
Montana	Native	May–June	473

Conservation status

Federal (U.S. ESA): Not listed No U.S. Endangered Species Act listing in the USFWS ECOS database. ^{USFWS ECOS}
NatureServe global: G4 Apparently secure worldwide. ^NatureServe
Washington: No list Washington has no state law listing endangered or threatened plants (the Washington Natural Heritage Program's rare plant list isn't regulatory), so we show NatureServe's Washington ranks instead. NatureServe: SNR, not yet ranked in Washington.
Idaho: No list Idaho has no state law listing endangered or threatened plants, so we show NatureServe's Idaho ranks instead. NatureServe: SNR, not yet ranked in Idaho.
Montana: No list Montana has no state law listing endangered or threatened plants, so we show NatureServe's Montana ranks instead. NatureServe: S4, apparently secure in Montana.
Rare elsewhere: Other states where NatureServe ranks it rare or missing: CA (S1), CO (S1), WY (S2). (S1 critically imperiled, S2 imperiled, SH possibly extirpated, SX presumed extirpated.)

Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.

Can you eat it?

For peopleNot well documented

None of the sources we checked (NC State Extension (no page for this plant), USDA PLANTS) say whether it's edible or poisonous for people.

For petsNot well documented

It isn't on the ASPCA plant list.

🌿 Never eat a wild plant unless you're certain of its ID; this isn't medical advice. Worried about a person? Call Poison Control at 1-800-222-1222. Worried about a pet? Call your vet.

Where does it grow?

USDA PLANTS records large-flowered triteleia in 8 states.

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recorded by USDA PLANTS on our state lists not recorded

See the full list of states

California, Colorado, Idaho, Montana, Oregon, Utah, Washington, Wyoming.

Washington counties with USDA records: Asotin, Chelan, Douglas, Garfield, Grant, Klickitat, Pend Oreille, San Juan, Skamania, Spokane, Stevens, Walla Walla, Whitman, Yakima.

Idaho counties with USDA records: Ada, Adams, Bannock, Bear Lake, Boise, Bonneville, Caribou, Clark, Elmore, Franklin, Fremont, Gem, Idaho, Kootenai, Latah, Lemhi, Lewis, Nez Perce, Owyhee, Payette, Teton, Twin Falls, Valley, Washington.

Montana counties with USDA records: Flathead, Gallatin, Lewis and Clark, Mineral, Powell, Sanders, Stillwater, Teton, Yellowstone.

Growing conditions

USDA PLANTS gives Large-flowered triteleia a medium shade tolerance, medium drought tolerance and medium moisture use. It is rated for soil pH 6.0 to 7.5 and winter lows down to -33 °F.

Shade tolerance: Medium
Drought tolerance: Medium
Moisture use: Medium
Soil textures it is adapted to: medium
Soil pH range: 6.0 to 7.5
Minimum temperature tolerated: -33 °F
Frost-free days needed (minimum): 160
Annual precipitation range: 20 to 40 inches
Minimum root depth: 8 inches
Salinity tolerance: None
Fertility requirement: Medium
Growth rate: Moderate
Lifespan: Short
Active growth period: Spring and Summer
Fruit or seed: Brown · Spring to Spring
Can be propagated by: bare root, bulb
Commercial availability: No Known Source

From the USDA PLANTS characteristics data for TRGR7. USDA ratings are general guidance for the species, not a guarantee for your garden.

Names, range and relatives

Native status by region (USDA PLANTS): Canada: Native; Lower 48 states: Native.

County records: USDA PLANTS lists it in 84 counties across 8 states; the most are in Idaho (24), Oregon (23), Washington (14).

Other Triteleia on Bloomipedia (1): Ithuriel's spear.

More from the Asparagaceae family (34 on Bloomipedia; most observed first): Yuccas, Solomon's plume (false Solomon's seal), Canada mayflower, Blue dicks, Common star-of-Bethlehem, Star-flowered lily-of-the-valley, Chaparral yucca, Mojave yucca.

More Washington flowers

Western Lily of the Valley

Maianthemum dilatatum

Native

🌼 Blooms in WA: May–June

Solomon's plume (false Solomon's seal)

Maianthemum racemosum

Native

🌼 Blooms in WA: April–June

Star-flowered lily-of-the-valley

Maianthemum stellatum

Native

🌼 Blooms in WA: May–July

Sources

USDA, NRCS. PLANTS Database, profile TRGR7.
iNaturalist, Triteleia grandiflora: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
Wikipedia, Triteleia grandiflora (lead quoted under CC BY-SA 4.0).
Washington: Washington State noxious weed list (WAC 16-750-005, -011, -015).
Idaho: Idaho noxious weeds (IDAPA 02.06.09, Section 220).
Montana: Montana noxious weed list (Admin. R. Mont. 4.5.206–4.5.210).
USFWS, ECOS species database (ESA listing check), October 17, 2026.
NatureServe Explorer, Triteleia grandiflora (global and state ranks).
Edibility and toxicity: no source found (marked "not well documented").
Photo: Matt Lavin via iNaturalist · CC BY 4.0 · resized.