North America Native Plant

Scarlet Gilia

Botanical name: Ipomopsis aggregata bridgesii

USDA symbol: IPAGB

Life cycle: biennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Gilia aggregata (Pursh) Spreng. var. bridgesii A. Gray (GIAGB)  âš˜  Gilia bridgesii (A. Gray) Wherry (GIBR2)  âš˜  Ipomopsis bridgesii (A. Gray) Wherry (IPBR2)   

Scarlet Gilia: A California Native Worth Growing Responsibly If you’re looking to add a splash of vibrant color to your California native garden while supporting local ecosystems, scarlet gilia (Ipomopsis aggregata bridgesii) might just be the perfect addition. This beautiful native forb brings striking red blooms and ecological benefits to ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: Status is uncertain but is somewhere between the following rankings: 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. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ 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. ⚘

Scarlet Gilia: A California Native Worth Growing Responsibly

If you’re looking to add a splash of vibrant color to your California native garden while supporting local ecosystems, scarlet gilia (Ipomopsis aggregata bridgesii) might just be the perfect addition. This beautiful native forb brings striking red blooms and ecological benefits to gardens throughout its range, though it comes with some important considerations for the responsible gardener.

What Makes This Plant Special

Scarlet gilia is a native forb—essentially a non-woody flowering plant—that calls California home. As a biennial or perennial plant, it offers gardeners flexibility in planning, sometimes completing its life cycle in two years or persisting for multiple seasons depending on conditions.

This plant goes by several scientific names you might encounter, including Gilia aggregata var. bridgesii, Gilia bridgesii, and Ipomopsis bridgesii, so don’t be confused if you see these different names at nurseries or in plant catalogs.

Where You’ll Find It Growing Wild

This particular subspecies of scarlet gilia is native to California, where it has adapted to local growing conditions over thousands of years. As a true California native, it’s perfectly suited to the state’s unique climate patterns and soil conditions.

A Word About Rarity

Here’s something important every gardener should know: this subspecies has a conservation status of S5T3T4, which indicates it may face some level of conservation concern. This means if you decide to grow scarlet gilia, you should only source plants or seeds from reputable native plant nurseries that practice responsible propagation methods. Never collect plants or seeds from wild populations.

Garden Appeal and Design Uses

While specific information about the bridgesii subspecies is limited, scarlet gilia typically produces stunning tubular flowers that create dramatic vertical interest in garden beds. These eye-catching blooms make excellent focal points in native plant gardens and work beautifully in naturalistic landscape designs.

This forb works well in:

  • Native plant gardens
  • Wildlife gardens
  • Drought-tolerant landscapes
  • Naturalized meadow areas

Growing Conditions and Care

As a California native, scarlet gilia has evolved to thrive in the state’s Mediterranean climate. While specific growing requirements for the bridgesii subspecies aren’t well-documented, native California plants generally prefer:

  • Well-draining soil
  • Full sun to partial shade
  • Minimal summer water once established
  • Good air circulation

Supporting Local Wildlife

Native plants like scarlet gilia play crucial roles in supporting local ecosystems. While specific pollinator relationships for this subspecies aren’t well-documented, native gilias are typically excellent plants for supporting beneficial insects, birds, and other wildlife that have co-evolved with these plants over millennia.

Planting Tips for Success

Given the limited availability of specific information about this subspecies, here are some general guidelines for success:

  • Source plants only from reputable native plant nurseries
  • Plant in fall for best establishment
  • Provide good drainage to prevent root rot
  • Allow plants to go through natural seasonal cycles
  • Avoid overwatering, especially in summer

The Bottom Line

Scarlet gilia bridgesii offers California gardeners a chance to grow a truly local native plant while supporting regional biodiversity. However, its conservation status means this isn’t a plant to grow casually—it deserves respect and responsible cultivation practices. If you can source it responsibly and provide appropriate growing conditions, this native forb can be a wonderful addition to your California native plant garden.

Remember, when we choose native plants, we’re not just decorating our gardens—we’re participating in the preservation of California’s natural heritage and providing habitat for the creatures that call this state home.

Scarlet Gilia

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

Solanales

Family

Polemoniaceae Juss. - Phlox family

Genus

Ipomopsis Michx. - ipomopsis

Species

Ipomopsis aggregata (Pursh) V.E. Grant - scarlet gilia

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