North America Native Plant

Valley Checkerbloom

Botanical name: Sidalcea hartwegii

USDA symbol: SIHA

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Valley Checkerbloom: A Charming California Native Annual If you’re looking to add some authentic California charm to your garden, valley checkerbloom might just be the delightful native annual you’ve been searching for. This lovely member of the mallow family brings a splash of pink to the landscape while supporting local ...

Valley Checkerbloom: A Charming California Native Annual

If you’re looking to add some authentic California charm to your garden, valley checkerbloom might just be the delightful native annual you’ve been searching for. This lovely member of the mallow family brings a splash of pink to the landscape while supporting local ecosystems.

Meet the Valley Checkerbloom

Valley checkerbloom (Sidalcea hartwegii) is a native California annual that belongs to the diverse world of forbs – those wonderful herbaceous plants that add texture and color to our gardens without the woody stems of shrubs and trees. As an annual, this plant completes its entire life cycle in just one growing season, making it a great choice for gardeners who enjoy seasonal variety.

Where You’ll Find It Growing Wild

This charming native calls California home, where it has adapted to the state’s unique climate and growing conditions. As a true California native, valley checkerbloom has co-evolved with local wildlife and plays an important role in supporting native ecosystems.

Why Grow Valley Checkerbloom?

There are several compelling reasons to consider adding valley checkerbloom to your garden:

  • It’s a true California native, helping you create an authentic regional landscape
  • As an annual, it provides seasonal interest and allows for garden experimentation
  • Native plants typically require less water and maintenance once established
  • It likely provides nectar and pollen for native pollinators
  • Perfect for naturalized areas and wildflower gardens

Garden Design Ideas

Valley checkerbloom works beautifully in several garden settings:

  • Wildflower meadows: Let it naturalize alongside other California natives for an authentic meadow feel
  • Native plant gardens: Combine with other indigenous species for a regionally appropriate landscape
  • Seasonal displays: Use as part of rotating annual displays that change with the seasons
  • Naturalized areas: Perfect for areas where you want a more relaxed, wild appearance

Growing Tips and Care

While specific growing information for valley checkerbloom can be limited, here are some general guidelines based on its native habitat and plant family characteristics:

  • Sunlight: Likely prefers full sun to partial shade
  • Soil: Well-draining soil is typically preferred by most Sidalcea species
  • Water: As a California native annual, it’s likely adapted to the state’s natural rainfall patterns
  • Planting: Direct sowing seeds in fall or early spring may be most successful

A Few Things to Keep in Mind

Valley checkerbloom is a relatively uncommon plant in cultivation, which means finding seeds or plants might require some detective work. You might need to check with specialized native plant nurseries or seed companies that focus on California flora. This rarity in the garden trade also means there’s limited specific growing information available, so some experimentation may be needed.

Supporting Your Local Ecosystem

By choosing native plants like valley checkerbloom, you’re making a positive impact on your local environment. Native plants provide food and habitat for native wildlife, require fewer resources to maintain, and help preserve the natural character of California’s landscapes.

While valley checkerbloom might require a bit more effort to source and grow than common garden center annuals, the reward of successfully cultivating this authentic California native makes it worth the extra effort for dedicated native plant enthusiasts.

Valley 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 hartwegii A. Gray ex Benth. - valley checkerbloom

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