North America Native Plant

Shasta Popcornflower

Botanical name: Plagiobothrys shastensis

USDA symbol: PLSH

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Shasta Popcornflower: A Rare Native Gem Worth Protecting Meet the Shasta popcornflower (Plagiobothrys shastensis), a delicate annual wildflower that’s as charming as it is elusive. This petite native bloom might not be the showiest plant in your garden, but it carries special significance for those passionate about preserving our natural ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: 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 ⚘

Shasta Popcornflower: A Rare Native Gem Worth Protecting

Meet the Shasta popcornflower (Plagiobothrys shastensis), a delicate annual wildflower that’s as charming as it is elusive. This petite native bloom might not be the showiest plant in your garden, but it carries special significance for those passionate about preserving our natural heritage.

What Makes Shasta Popcornflower Special

The Shasta popcornflower belongs to the forget-me-not family and shares that characteristic cluster of tiny white flowers that give popcornflowers their whimsical name. As an annual forb, this plant completes its entire life cycle in one growing season, sprouting, blooming, setting seed, and dying back all within a year.

What truly sets this species apart is its conservation status. Plagiobothrys shastensis holds a Global Conservation Status of S3, meaning it’s considered vulnerable throughout its range. With typically only 21 to 100 known occurrences and between 3,000 to 10,000 individuals remaining, this little wildflower needs our help to survive.

Where Does It Call Home?

This rare beauty is native to a surprisingly small area, found only in California and Oregon. Its limited range makes it even more precious to those lucky enough to encounter it in the wild or cultivate it responsibly in their gardens.

Should You Grow Shasta Popcornflower?

Here’s where things get interesting. While we absolutely encourage growing native plants, the Shasta popcornflower’s vulnerable status means you need to be extra thoughtful about how you source your seeds or plants.

The responsible approach:

  • Only obtain seeds or plants from reputable native plant nurseries
  • Never collect from wild populations
  • Ensure any material is ethically and sustainably sourced
  • Consider this plant as part of conservation gardening efforts

Garden Role and Design Ideas

The Shasta popcornflower fits beautifully into native wildflower gardens and naturalized landscapes. Its modest size and delicate white blooms make it perfect for:

  • Native plant restoration projects
  • Wildflower meadow gardens
  • Conservation-focused landscapes
  • Educational gardens showcasing rare species

Don’t expect this plant to be a garden showstopper – its beauty lies in its subtlety and the important ecological role it plays in its native ecosystem.

Growing Conditions and Care

Based on its native habitat, Shasta popcornflower thrives in USDA hardiness zones 8-10. As a spring bloomer, it prefers:

  • Moist soils during the growing season
  • Well-draining conditions to prevent root rot
  • Full sun to partial shade
  • Cool, wet winters followed by warm, dry summers (typical of its native Mediterranean climate)

Planting and Care Tips

Since this is an annual, you’ll need to either allow it to self-seed or replant each year. Here’s how to give it the best start:

  • Sow seeds in fall or early winter for spring germination
  • Provide consistent moisture during the growing season
  • Allow some plants to go to seed for natural regeneration
  • Avoid over-fertilizing – these plants prefer lean soils

Pollinator and Wildlife Benefits

While small, the Shasta popcornflower’s clusters of tiny white flowers attract native bees and other small pollinators. Every little bit helps in supporting our declining pollinator populations, and rare natives like this one often have specialized relationships with local wildlife.

The Bottom Line

Growing Shasta popcornflower isn’t about creating a dramatic garden display – it’s about participating in conservation and supporting biodiversity. If you’re passionate about preserving rare native plants and have access to responsibly sourced material, this humble little wildflower deserves a spot in your conservation garden.

Remember, every plant we grow responsibly is a small victory for conservation. The Shasta popcornflower may be vulnerable now, but with thoughtful gardeners like you helping to preserve it, future generations might have the chance to enjoy this delicate native treasure.

Shasta Popcornflower

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

Lamiales

Family

Boraginaceae Juss. - Borage family

Genus

Plagiobothrys Fisch. & C.A. Mey. - popcornflower

Species

Plagiobothrys shastensis Greene ex A. Gray - Shasta popcornflower

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