North America Native Plant

Coast Checkerbloom

Botanical name: Sidalcea oregana eximia

USDA symbol: SIORE

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Sidalcea eximia Greene (SIEX3)   

Coast Checkerbloom: A Rare California Native Worth Protecting in Your Garden If you’re looking to add a touch of wild California beauty to your garden while supporting conservation efforts, coast checkerbloom might just be your new favorite native plant. This charming perennial brings cottage garden appeal with an important ecological ...

Rare plant alert!

Region: Conservation status by state

Status: S5T1: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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. ⚘

Coast Checkerbloom: A Rare California Native Worth Protecting in Your Garden

If you’re looking to add a touch of wild California beauty to your garden while supporting conservation efforts, coast checkerbloom might just be your new favorite native plant. This charming perennial brings cottage garden appeal with an important ecological mission.

What Makes Coast Checkerbloom Special?

Coast checkerbloom (Sidalcea oregana eximia) is a delightful native perennial that produces spikes of pink to rose-colored flowers reminiscent of miniature hollyhocks. As a member of the mallow family, this forb herb creates vertical interest in the garden while staying true to California’s natural heritage.

You might also see this plant listed under its synonym, Sidalcea eximia Greene, in older gardening references or plant databases.

Where Does It Call Home?

This beautiful native is exclusively found in California, where it grows naturally along the coast. Its limited geographic distribution makes it a true California treasure that deserves a special place in Golden State gardens.

A Word About Rarity

Important conservation note: Coast checkerbloom has a conservation status that suggests it may be uncommon in the wild. If you’re interested in growing this plant, please ensure you source it responsibly from reputable native plant nurseries that propagate their own stock rather than wild-collecting. This way, you can enjoy this beauty while helping protect wild populations.

Why Your Garden (and Local Wildlife) Will Love It

Coast checkerbloom isn’t just a pretty face – it’s a pollinator magnet! The cheerful pink blooms attract:

  • Native bees looking for nectar and pollen
  • Butterflies seeking a reliable food source
  • Other beneficial insects that help keep your garden ecosystem healthy

As a native plant, it’s perfectly adapted to work with California’s natural cycles and wildlife, making it a smart choice for eco-conscious gardeners.

Perfect Garden Spots for Coast Checkerbloom

This versatile native shines in several garden settings:

  • Native plant gardens: A natural choice for authentic California landscapes
  • Coastal gardens: Thrives in the mild, maritime climate
  • Cottage gardens: Adds that casual, romantic charm with its hollyhock-like flowers
  • Wildflower meadows: Perfect for naturalistic plantings
  • Pollinator gardens: An essential addition to support local wildlife

Growing Coast Checkerbloom Successfully

The good news? Once established, coast checkerbloom is fairly low-maintenance – a trait shared by many California natives.

Ideal Growing Conditions

  • Sunlight: Full sun to partial shade (morning sun with some afternoon protection works well)
  • Soil: Well-draining soil is essential – these plants don’t like wet feet
  • Water: Drought-tolerant once established, but appreciates occasional deep watering
  • Climate zones: Hardy in USDA zones 8-10, perfect for most of California

Planting and Care Tips

  • Plant in fall or early spring for best establishment
  • Provide regular water the first year while roots develop
  • Mulch around the base to retain moisture and suppress weeds
  • Deadhead spent flowers to encourage continued blooming
  • Cut back in late fall or early winter after flowering finishes
  • Divide clumps every 3-4 years to maintain vigor

The Bottom Line

Coast checkerbloom offers California gardeners a wonderful opportunity to grow something truly special – a rare native that brings both beauty and ecological benefits to the landscape. While its conservation status means we need to be thoughtful about sourcing, adding this lovely perennial to your garden helps preserve California’s botanical heritage while creating habitat for local wildlife.

Just remember: always buy from reputable native plant nurseries that grow their own stock. Your garden – and California’s wild spaces – will thank you for it!

Coast Checkerbloom

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Malvales

Family

Malvaceae Juss. - Mallow family

Genus

Sidalcea A. Gray - checkerbloom

Species

Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray - Oregon checkerbloom

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