North America Native Plant

Griffin’s Bellflower

Botanical name: Campanula griffinii

USDA symbol: CAGR26

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Campanula angustiflora Eastw. var. exilis J.T. Howell (CAANE)   

Griffin’s Bellflower: A Delicate California Native Worth Growing If you’re looking to add a touch of delicate charm to your California native garden, Griffin’s bellflower (Campanula griffinii) might just be the perfect annual wildflower you didn’t know you needed. This petite member of the bellflower family brings understated elegance to ...

Rare plant alert!

Region: Conservation status by state

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

Griffin’s Bellflower: A Delicate California Native Worth Growing

If you’re looking to add a touch of delicate charm to your California native garden, Griffin’s bellflower (Campanula griffinii) might just be the perfect annual wildflower you didn’t know you needed. This petite member of the bellflower family brings understated elegance to naturalized landscapes and wild gardens throughout the Golden State.

What Makes Griffin’s Bellflower Special

Griffin’s bellflower is a true California native, found naturally in the Sierra Nevada foothills and surrounding regions. As an annual forb, this plant completes its entire life cycle in one growing season, producing small, bell-shaped flowers that add a pop of purple-blue color to the landscape. Unlike its woody cousins, this herbaceous plant lacks significant woody tissue and regrows from seed each year.

You might also encounter this plant listed under its botanical synonym, Campanula angustiflora var. exilis, though Campanula griffinii is the accepted name today.

Where You’ll Find This California Beauty

Griffin’s bellflower calls California home exclusively, making it a fantastic choice for gardeners wanting to support local ecosystems. This endemic species has adapted specifically to California’s unique Mediterranean climate and growing conditions.

Why Add Griffin’s Bellflower to Your Garden

There are several compelling reasons to consider this native annual:

  • Supports local wildlife and pollinators with its nectar-rich flowers
  • Requires minimal water once established, perfect for drought-tolerant landscaping
  • Adds fine texture and delicate beauty to wild gardens and naturalized areas
  • Self-seeds readily, ensuring continued blooms year after year
  • Perfectly suited to California’s climate zones 8-10

Design Ideas and Garden Placement

Griffin’s bellflower shines in several garden settings. Try incorporating it into:

  • Native wildflower meadows for natural-looking displays
  • Rock gardens where its delicate form won’t compete with larger plants
  • Edges of pathways for subtle seasonal interest
  • Mixed with other California native annuals for diverse seasonal color

Because it’s an annual with a relatively fine texture, it works best as a supporting player rather than a main focal point in your garden design.

Growing Griffin’s Bellflower Successfully

Growing this California native is surprisingly straightforward once you understand its preferences:

Light Requirements: Provide full sun to partial shade. Like many California natives, it appreciates some protection from intense afternoon sun in hotter inland areas.

Soil Needs: Well-draining soil is essential. Griffin’s bellflower adapted to California’s natural soils, so avoid overly rich or constantly moist conditions that can lead to problems.

Watering: Once established, this drought-tolerant native requires minimal supplemental irrigation. Water deeply but infrequently to encourage deep root development.

Climate Considerations: Thrives in USDA hardiness zones 8-10, making it suitable for most of California’s diverse microclimates.

Planting and Care Tips

Since Griffin’s bellflower is an annual, successful growing starts with proper timing and seeding techniques:

  • Plant seeds in fall for the best germination rates
  • Scatter seeds directly in the garden rather than starting transplants
  • Lightly rake seeds into soil surface but don’t bury deeply
  • Allow some plants to go to seed to ensure natural reseeding
  • Avoid fertilizing, as this can encourage excessive foliage at the expense of flowers

Supporting Pollinators and Wildlife

One of the best reasons to grow Griffin’s bellflower is its value to local ecosystems. The small, bell-shaped flowers provide nectar for various native pollinators, including specialized bees and butterflies that have co-evolved with California’s native flora. By choosing this native over non-native alternatives, you’re helping maintain the delicate relationships between local plants and wildlife.

Is Griffin’s Bellflower Right for Your Garden?

Griffin’s bellflower is ideal for gardeners who appreciate subtle beauty and want to support California’s native ecosystems. It’s particularly well-suited for those creating water-wise landscapes, native plant gardens, or naturalized areas. However, if you’re looking for bold, showy blooms or a long-lasting perennial, you might want to consider other options.

This charming annual proves that sometimes the most beautiful gardens are filled with plants that know exactly where they belong – and Griffin’s bellflower definitely belongs in California.

Griffin’s Bellflower

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

Campanulales

Family

Campanulaceae Juss. - Bellflower family

Genus

Campanula L. - bellflower

Species

Campanula griffinii Morin - Griffin's bellflower

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