North America Native Plant

Howellia

Botanical name: Howellia

USDA symbol: HOWEL

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Howellia: A Mysterious Native Annual Worth Knowing About If you’ve stumbled across the name howellia in your native plant research, you’re probably wondering what exactly this plant is and whether it belongs in your garden. Well, you’ve discovered one of North America’s more elusive native annuals – a plant that’s ...

Howellia: A Mysterious Native Annual Worth Knowing About

If you’ve stumbled across the name howellia in your native plant research, you’re probably wondering what exactly this plant is and whether it belongs in your garden. Well, you’ve discovered one of North America’s more elusive native annuals – a plant that’s as mysterious as it is rare in cultivation.

What is Howellia?

Howellia is a native annual forb that calls the Pacific Northwest and parts of California home. As a forb, it’s an herbaceous plant without any significant woody tissue – think of it as a wildflower rather than a shrub or tree. This little-known plant completes its entire life cycle in just one growing season, making it a true annual.

Where Does Howellia Grow?

This native beauty has made its home across five western states: California, Idaho, Montana, Oregon, and Washington. It’s perfectly adapted to life in the lower 48 states, having evolved alongside the region’s other native flora for thousands of years.

Should You Grow Howellia in Your Garden?

Here’s where things get a bit tricky. While howellia is undoubtedly a legitimate native plant with every right to a place in native gardens, it’s not exactly what you’d call garden-center material. This plant seems to prefer staying under the radar, and information about successfully growing it is surprisingly scarce.

The Challenge with Howellia

Unlike many popular native plants, howellia doesn’t have well-documented growing requirements or established cultivation practices. This presents several challenges for the home gardener:

  • Limited availability of seeds or plants from nurseries
  • Unknown specific growing conditions and care requirements
  • Unclear germination and propagation methods
  • Uncertain garden performance and aesthetic value

Better Native Alternatives

If you’re drawn to native annuals that will actually thrive in your Pacific Northwest or California garden, consider these well-established alternatives:

  • California poppies for vibrant orange blooms
  • Clarkia species for delicate, colorful flowers
  • Annual lupines for tall, showy spikes
  • Baby blue eyes for charming blue ground cover

The Bottom Line

While howellia deserves recognition as a native plant, it’s not the most practical choice for home gardeners. Its mysterious nature and lack of cultivation information make it better suited for botanical enthusiasts or restoration specialists rather than typical landscape use.

If you’re passionate about growing truly uncommon natives and don’t mind some trial and error, howellia might be worth pursuing through specialized native plant societies or seed exchanges. Just be prepared for a gardening adventure with no guarantees!

For most gardeners seeking reliable, beautiful native annuals, sticking with better-documented species will provide more satisfying results and still support local ecosystems effectively.

Howellia

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Campanulales

Family

Campanulaceae Juss. - Bellflower family

Genus

Howellia A. Gray - howellia

Species

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