North America Native Plant

Grand Collomia

Botanical name: Collomia grandiflora

USDA symbol: COGR4

Life cycle: annual

Habit: forb

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

Grand Collomia: A Native Wildflower That’s Pure Garden Gold If you’re looking for a native wildflower that punches above its weight in the garden, let me introduce you to grand collomia (Collomia grandiflora). This cheerful annual might not be a household name, but it deserves a spot on every native ...

Grand Collomia: A Native Wildflower That’s Pure Garden Gold

If you’re looking for a native wildflower that punches above its weight in the garden, let me introduce you to grand collomia (Collomia grandiflora). This cheerful annual might not be a household name, but it deserves a spot on every native plant enthusiast’s radar. With its vibrant salmon-pink blooms and wildlife magnetism, grand collomia brings both beauty and ecological value to gardens across the western United States.

What is Grand Collomia?

Grand collomia is an annual forb native to western North America, belonging to the phlox family. As a forb, it’s an herbaceous flowering plant that lacks woody stems, making it a perfect addition to wildflower meadows and naturalized areas. Don’t let its modest stature fool you – this little powerhouse produces clusters of trumpet-shaped flowers that create quite the visual impact when planted in groups.

Where Does Grand Collomia Call Home?

This native beauty has quite the range, naturally occurring across the western United States and into British Columbia, Canada. You’ll find wild populations thriving in Arizona, California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, and Wyoming. Its widespread distribution speaks to its adaptability and resilience – always good signs for home gardeners!

Why Gardeners Love Grand Collomia

There are several compelling reasons to consider adding grand collomia to your garden palette:

  • Native status: Supporting local ecosystems by planting natives is always a win
  • Pollinator magnet: The tubular flowers are particularly attractive to hummingbirds, butterflies, and native bees
  • Low maintenance: Once established, it’s remarkably drought tolerant and self-sufficient
  • Beautiful blooms: Clusters of salmon-pink to orange flowers create stunning color displays
  • Self-sowing: Will readily reseed itself, ensuring continued blooms year after year

Perfect Garden Settings

Grand collomia shines in several garden styles and settings. It’s absolutely perfect for native plant gardens, where it can mingle with other indigenous species. Wildflower meadows and naturalized areas provide ideal backdrops for its casual charm. The plant also works beautifully in xeriscapes and drought-tolerant gardens, thanks to its water-wise nature once established.

For those with cottage-style gardens, grand collomia adds a touch of wild authenticity among more traditional plantings. Its relatively compact size makes it suitable for borders and edges, while mass plantings create impressive color sweeps.

Growing Conditions and Care

One of grand collomia’s greatest assets is its easygoing nature. Here’s what this native beauty prefers:

  • Sunlight: Full sun for best flowering performance
  • Soil: Well-drained soils of various types; quite adaptable
  • Water: Drought tolerant once established, but appreciates occasional watering during dry spells
  • USDA Zones: Hardy in zones 3-9, making it suitable for most temperate regions

Planting and Propagation Tips

Growing grand collomia is refreshingly straightforward. Since it’s an annual, you’ll want to start from seed. The best approach is direct sowing in fall or early spring, allowing natural weather cycles to help with germination. Simply scatter seeds over prepared soil and lightly rake them in.

Spring sowings work well too, especially if you give the seeds a brief cold treatment in the refrigerator for a few weeks before planting. This mimics the natural winter conditions the seeds would experience in the wild.

Once established, grand collomia typically self-sows readily, meaning you’ll likely have volunteers appearing in subsequent years. This natural reseeding creates a more naturalized look and reduces your workload – a definite bonus!

Supporting Wildlife

Beyond its ornamental value, grand collomia serves as an important food source for various pollinators. Hummingbirds are particularly drawn to the tubular flowers, making it an excellent choice for bird-friendly gardens. Native bees and butterflies also frequent the blooms, contributing to the overall health of your garden ecosystem.

The Bottom Line

Grand collomia represents everything we love about native plants: it’s beautiful, low-maintenance, ecologically valuable, and perfectly adapted to its regional climate. While it might not have the name recognition of some garden favorites, it definitely deserves consideration for anyone interested in creating sustainable, wildlife-friendly landscapes.

Whether you’re establishing a native plant garden, adding color to a xeriscape, or simply wanting to support local pollinators, grand collomia delivers on all fronts. Give this underappreciated native a try – you might just discover your new favorite wildflower!

Grand Collomia

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

Solanales

Family

Polemoniaceae Juss. - Phlox family

Genus

Collomia Nutt. - trumpet

Species

Collomia grandiflora Douglas ex Lindl. - grand collomia

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