North America Native Plant

Yellow Star-tulip

Botanical name: Calochortus monophyllus

USDA symbol: CAMO3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Cyclobothra monophylla Lindl. (CYMO8)   

Yellow Star-Tulip: A Hidden Gem for California Native Gardens If you’re looking to add a touch of understated elegance to your native garden, the yellow star-tulip (Calochortus monophyllus) might just be the perfect choice. This charming California native bulb produces delicate, star-shaped flowers that seem to glow like tiny lanterns ...

Rare plant alert!

Region: Conservation status by state

Status: S3S4: 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 ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Yellow Star-Tulip: A Hidden Gem for California Native Gardens

If you’re looking to add a touch of understated elegance to your native garden, the yellow star-tulip (Calochortus monophyllus) might just be the perfect choice. This charming California native bulb produces delicate, star-shaped flowers that seem to glow like tiny lanterns in the spring landscape.

What Makes Yellow Star-Tulip Special?

Yellow star-tulip is a perennial forb—essentially a non-woody flowering plant that comes back year after year from underground bulbs. True to its name, this beauty produces distinctive three-petaled yellow flowers, often adorned with subtle markings that make each bloom a small work of art. The plant typically sends up a single, narrow basal leaf along with its flowering stem, creating a minimalist aesthetic that’s both elegant and unassuming.

Where Does It Call Home?

This lovely native species naturally occurs along the Pacific Coast, specifically in California and Oregon. You’ll find it thriving in grasslands, oak woodlands, and chaparral communities where it has adapted to the region’s Mediterranean climate patterns.

Why Consider Adding It to Your Garden?

Here are several compelling reasons to give yellow star-tulip a spot in your landscape:

  • Native plant credentials: As a true California native, it supports local ecosystems and requires minimal resources once established
  • Pollinator magnet: The flowers attract native bees and other beneficial insects
  • Low maintenance: Once established, it thrives with minimal intervention
  • Seasonal interest: Provides beautiful spring blooms that naturalize over time
  • Water-wise: Perfectly adapted to dry summer conditions

Important Conservation Note

Yellow star-tulip has a conservation status of S3S4, meaning it’s somewhat uncommon in its native range. If you decide to grow this species, please ensure you source bulbs from reputable native plant nurseries that propagate their own stock rather than collecting from wild populations.

Perfect Garden Settings

This charming bulb works beautifully in:

  • Native plant gardens
  • Mediterranean-climate landscapes
  • Rock gardens and naturalized areas
  • Drought-tolerant garden designs
  • Oak woodland understory plantings

Growing Conditions and Care

Climate: Hardy in USDA zones 7-10, yellow star-tulip thrives in areas with Mediterranean climate patterns—wet winters and dry summers.

Light: Prefers full sun to partial shade

Soil: Well-draining soil is absolutely essential. These bulbs will rot in waterlogged conditions, so consider raised beds or slopes if your soil tends to hold moisture.

Water: Follow nature’s lead—provide moisture during the fall and winter growing season, then allow the soil to dry out completely during summer dormancy.

Planting and Care Tips

When to plant: Fall is the ideal time to plant bulbs, giving them time to establish roots before spring growth begins.

Planting depth: Plant bulbs about 3-4 inches deep in well-draining soil.

Spacing: Allow 4-6 inches between bulbs for natural-looking clusters.

Summer care: This is crucial—allow the area to go completely dry during summer months. The bulbs need this dormant period to thrive.

Fertilizing: Generally unnecessary if planted in appropriate soil conditions.

Potential Challenges

The biggest challenge with yellow star-tulip is overwatering, especially during summer dormancy. Many gardeners struggle with the idea of letting an area go completely dry, but this Mediterranean native absolutely requires it. Mark the planting area so you don’t accidentally water it during summer garden maintenance.

The Bottom Line

Yellow star-tulip offers native plant gardeners a chance to grow something truly special—a delicate, beautiful wildflower that perfectly embodies California’s natural heritage. While it requires specific conditions and careful sourcing due to its conservation status, the reward of seeing these cheerful yellow stars emerge each spring makes the effort worthwhile. Just remember: when in doubt, let it drought!

Yellow Star-tulip

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Liliaceae Juss. - Lily family

Genus

Calochortus Pursh - mariposa lily

Species

Calochortus monophyllus (Lindl.) Lem. - yellow star-tulip

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