North America Native Plant

Temblor Range Clarkia

Botanical name: Clarkia tembloriensis tembloriensis

USDA symbol: CLTET

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Temblor Range Clarkia: A Rare California Gem Worth Protecting If you’re looking to add a touch of California’s wild beauty to your garden while supporting conservation efforts, the Temblor Range clarkia might just be the perfect choice. This charming annual wildflower, scientifically known as Clarkia tembloriensis tembloriensis, is a true ...

Rare plant alert!

Region: Conservation status by state

Status: S3T3: 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 ⚘ Subspecies or variety is 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. ⚘

Temblor Range Clarkia: A Rare California Gem Worth Protecting

If you’re looking to add a touch of California’s wild beauty to your garden while supporting conservation efforts, the Temblor Range clarkia might just be the perfect choice. This charming annual wildflower, scientifically known as Clarkia tembloriensis tembloriensis, is a true California native that brings delicate spring color to naturalized landscapes.

What Makes This Plant Special

The Temblor Range clarkia is an annual forb—essentially a non-woody flowering plant that completes its entire life cycle in one growing season. What makes this particular clarkia truly special is its limited distribution and conservation status. This plant has earned a Global Conservation Status of S3T3, indicating that it’s considered vulnerable and relatively rare in the wild.

Where You’ll Find It Growing Wild

As its common name suggests, this clarkia is endemic to California, with its natural range centered around the Temblor Range area. It’s one of those plants that really embodies the unique character of California’s diverse ecosystems, having evolved to thrive in the specific conditions of this region.

A Word About Rarity

Before we dive into growing tips, it’s important to address the elephant in the room: this plant’s rare status. Because the Temblor Range clarkia is considered vulnerable, any gardening efforts should use only responsibly sourced seeds or plants. This means:

  • Never collect seeds or plants from wild populations
  • Purchase only from reputable native plant nurseries
  • Consider participating in seed collection programs led by conservation organizations
  • Focus on growing this plant to support conservation rather than just aesthetic purposes

Why Grow Temblor Range Clarkia

Despite—or perhaps because of—its rarity, there are compelling reasons to include this plant in your garden:

  • Conservation impact: Growing rare natives helps preserve genetic diversity and can support local populations
  • Authentic California character: Few plants capture the essence of California’s wildlands quite like endemic species
  • Pollinator support: Native clarkias are excellent sources of nectar and pollen for native bees and other small pollinators
  • Low maintenance: Once established, this annual requires minimal care and water
  • Spring beauty: The delicate flowers provide lovely spring color in naturalized settings

Ideal Growing Conditions

Like most California natives, the Temblor Range clarkia is adapted to the state’s Mediterranean climate patterns. Here’s what this plant prefers:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soils; avoid heavy clay or constantly moist conditions
  • Water: Drought-tolerant once established; minimal summer watering needed
  • Climate: Best suited for USDA hardiness zones 8-10

Perfect Garden Settings

This clarkia shines in:

  • Native plant gardens focused on California species
  • Wildflower meadows and naturalized areas
  • Xerophytic (drought-adapted) landscape designs
  • Conservation gardens aimed at preserving rare species
  • Pollinator gardens supporting native bee populations

Planting and Care Tips

Growing Temblor Range clarkia successfully requires understanding its natural life cycle:

  • Timing: Direct seed in fall for natural winter stratification and spring germination
  • Soil prep: Ensure excellent drainage; consider raised beds if your soil is heavy
  • Seeding: Scatter seeds lightly and barely cover with soil
  • Watering: Water gently after seeding, then rely on winter rains
  • Maintenance: Minimal intervention needed once established; allow plants to set seed for next year’s crop
  • Harvesting: If collecting seeds, do so responsibly and consider sharing with conservation groups

The Bottom Line

The Temblor Range clarkia represents both an opportunity and a responsibility for California gardeners. While its rarity means extra care must be taken in sourcing and growing it, successfully cultivating this plant contributes to conservation efforts while adding authentic California character to your landscape. If you choose to grow this special wildflower, you’re not just gardening—you’re participating in preserving a piece of California’s natural heritage for future generations.

Remember, the best approach is to start small, source responsibly, and think of yourself as a steward rather than just a gardener. Your efforts could help ensure that this beautiful clarkia continues to grace California’s landscapes for years to come.

Temblor Range Clarkia

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Myrtales

Family

Onagraceae Juss. - Evening Primrose family

Genus

Clarkia Pursh - clarkia

Species

Clarkia tembloriensis Vasek - Temblor Range clarkia

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