North America Native Plant

Howell’s Triteleia

Botanical name: Triteleia grandiflora var. howellii

USDA symbol: TRGRH

Life cycle: perennial

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Brodiaea douglasii S. Watson var. howellii (S. Watson) M. Peck (BRDOH)  âš˜  Brodiaea howellii S. Watson (BRHO)  âš˜  Triteleia bicolor (Suksd.) Abrams (TRBI4)  âš˜  Triteleia howellii (S. Watson) Greene (TRHO5)   

Howell’s Triteleia: A Hidden Gem for Pacific Northwest Gardens If you’re looking to add authentic Pacific Northwest charm to your garden, Howell’s triteleia (Triteleia grandiflora var. howellii) might just be the native wildflower you’ve been searching for. This delightful spring bloomer brings a touch of wild beauty that’s both understated ...

Rare plant alert!

Region: Conservation status by state

Status: S4S5T3T4Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Howell’s Triteleia: A Hidden Gem for Pacific Northwest Gardens

If you’re looking to add authentic Pacific Northwest charm to your garden, Howell’s triteleia (Triteleia grandiflora var. howellii) might just be the native wildflower you’ve been searching for. This delightful spring bloomer brings a touch of wild beauty that’s both understated and utterly charming.

What Makes Howell’s Triteleia Special?

Howell’s triteleia is a native perennial forb that belongs to the broader family of plants that put on spectacular spring shows throughout the Pacific Northwest. Unlike its showier cousins, this variety offers a more subtle beauty with clusters of white to pale blue funnel-shaped flowers that dance atop slender stems in late spring.

As a true native, this plant has been gracing the landscapes of British Columbia, Washington, Oregon, and northern California long before any of us started thinking about garden design. It’s perfectly adapted to the region’s unique climate patterns, making it an excellent choice for gardeners who want to work with nature rather than against it.

Why Consider Growing Howell’s Triteleia?

There are several compelling reasons to include this native beauty in your landscape:

  • True Pacific Northwest heritage: Supporting native plants helps preserve regional biodiversity
  • Low maintenance: Once established, it thrives with minimal intervention
  • Pollinator magnet: Native bees and butterflies love the spring blooms
  • Drought tolerance: Perfect for water-wise landscaping
  • Naturalized beauty: Creates that coveted wild look in cultivated spaces

A Note About Rarity

Before you rush out to find this plant, there’s something important to know: Howell’s triteleia has a conservation status that suggests it’s not as common as it once was. This makes it even more special, but it also means we need to be responsible gardeners. If you decide to grow this beauty, make sure you source it from reputable native plant nurseries that propagate their own stock rather than wild-collecting.

Perfect Garden Settings

Howell’s triteleia shines in several garden scenarios:

  • Native plant gardens: A natural fit alongside other Pacific Northwest natives
  • Rock gardens: Its compact size and drought tolerance make it ideal for rocky settings
  • Naturalized meadows: Helps create authentic wildflower displays
  • Drought-tolerant landscapes: Requires minimal summer water once established

Growing Conditions and Care

The secret to successfully growing Howell’s triteleia lies in understanding its natural preferences. This plant thrives in USDA hardiness zones 7-9 and prefers well-draining soils with full sun to partial shade exposure.

The key to success is mimicking the Mediterranean-style climate this plant evolved with: wet winters and dry summers. During its growing season in late winter and spring, provide moderate moisture. But here’s the crucial part – once it finishes blooming and the foliage begins to yellow, back off on the water significantly. This summer dormancy period is essential for the plant’s long-term health.

Planting and Maintenance Tips

Plant bulbs in fall when soil temperatures have cooled. Choose a location with excellent drainage – soggy soil is this plant’s biggest enemy. Space bulbs about 4-6 inches apart and plant them at a depth roughly three times their height.

Once established, Howell’s triteleia is remarkably low-maintenance. Allow the foliage to die back naturally after blooming, as this feeds the bulb for next year’s show. Resist the urge to water heavily during summer dormancy, and you’ll be rewarded with reliable spring blooms year after year.

Wildlife and Pollinator Benefits

One of the most rewarding aspects of growing native plants like Howell’s triteleia is watching the wildlife interactions. The spring flowers provide important nectar sources for native pollinators emerging from winter dormancy. Native bees, in particular, have co-evolved with plants like this and benefit greatly from their presence in the landscape.

The Bottom Line

Howell’s triteleia offers Pacific Northwest gardeners a chance to grow something truly special – a plant that’s not only beautiful but also deeply connected to the region’s natural heritage. While it may require a bit more effort to source responsibly due to its conservation status, the reward of growing this authentic native makes the search worthwhile. Just remember to embrace its natural rhythm of wet winters and dry summers, and you’ll have a delightful addition to your garden that blooms reliably each spring.

Howell’s Triteleia

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Liliaceae Juss. - Lily family

Genus

Triteleia Douglas ex Lindl. - triteleia

Species

Triteleia grandiflora Lindl. - largeflower triteleia

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA