North America Native Plant

Orange Bush Monkeyflower

Botanical name: Diplacus aurantiacus australis

USDA symbol: DIAUA2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Diplacus australis McMinn (DIAU2)  âš˜  Mimulus aurantiacus W. Curtis ssp. australis (McMinn) Munz (MIAUA)   

Orange Bush Monkeyflower: A Bright Native Gem for Water-Wise Gardens Meet the orange bush monkeyflower (Diplacus aurantiacus australis), a delightfully cheerful native shrub that’s perfectly suited for California’s Mediterranean climate. This perennial beauty brings a splash of vibrant orange to your garden while requiring minimal water – talk about a ...

Rare plant alert!

Region: Conservation status by state

Status: S5T2Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ 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. ⚘

Orange Bush Monkeyflower: A Bright Native Gem for Water-Wise Gardens

Meet the orange bush monkeyflower (Diplacus aurantiacus australis), a delightfully cheerful native shrub that’s perfectly suited for California’s Mediterranean climate. This perennial beauty brings a splash of vibrant orange to your garden while requiring minimal water – talk about a win-win!

What Makes This Plant Special

The orange bush monkeyflower is a true California native, naturally occurring throughout the Golden State’s diverse landscapes. You might also see it listed under its former scientific names, including Diplacus australis or Mimulus aurantiacus subspecies australis – botanists love to keep us on our toes with their naming conventions!

As a native perennial shrub, this plant typically grows as a multi-stemmed woody specimen, usually staying under 13-16 feet in height, though most garden varieties remain much more compact. Its tubular orange flowers are the star of the show, blooming prolifically and creating a stunning display that catches the eye from across the garden.

Where It Calls Home

This monkeyflower is endemic to California, where it has adapted perfectly to the state’s unique climate conditions. From coastal areas to inland valleys, it has found its niche in the diverse California landscape.

Why You’ll Want This in Your Garden

There are several compelling reasons to consider adding orange bush monkeyflower to your landscape:

  • Drought tolerance: Once established, this shrub thrives with minimal irrigation – perfect for water-conscious gardeners
  • Pollinator magnet: The tubular orange flowers are irresistible to hummingbirds and native bees
  • Low maintenance: Native plants are naturally adapted to local conditions, requiring less fussing
  • Year-round structure: As a perennial shrub, it provides consistent garden framework
  • Native habitat support: Supporting local ecosystems by growing indigenous plants

Perfect Garden Partnerships

Orange bush monkeyflower shines in water-wise and native plant gardens. It’s an excellent choice for:

  • Mediterranean-style landscapes
  • Xerophytic (dry) gardens
  • Native plant gardens
  • Pollinator gardens
  • Low-water landscape designs

Growing Conditions and Care

This adaptable shrub is surprisingly easy to please. Here’s what it loves:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is essential – it won’t tolerate soggy conditions
  • Climate zones: USDA zones 9-10, perfect for Southern California conditions
  • Water needs: Drought-tolerant once established, but appreciates occasional deep watering during dry spells

Planting and Care Tips

Getting your orange bush monkeyflower off to a great start is straightforward:

  • Plant in fall for best establishment before summer heat
  • Ensure excellent drainage – amend heavy clay soils if necessary
  • Water regularly during the first growing season, then reduce frequency
  • Light pruning after flowering helps maintain shape and encourages more blooms
  • Mulch around the base to retain moisture and suppress weeds

A Note About Responsible Sourcing

While researching this plant, we found that its conservation status is somewhat unclear (listed as S5T2Q). To be on the safe side, always source your orange bush monkeyflower from reputable native plant nurseries that propagate their own stock rather than wild-collecting. This ensures you’re getting a healthy plant while protecting wild populations.

The Bottom Line

Orange bush monkeyflower is a fantastic choice for California gardeners looking to create beautiful, sustainable landscapes. Its combination of stunning orange blooms, drought tolerance, and native habitat value makes it a stellar addition to water-wise gardens. Plus, you’ll love watching hummingbirds zip around those bright tubular flowers – it’s like having your own private nature show!

Whether you’re creating a dedicated native plant garden or simply want to add some drought-tolerant color to your landscape, this cheerful shrub deserves serious consideration. Your local pollinators (and your water bill) will thank you!

Orange Bush Monkeyflower

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

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Diplacus Nutt. - bush monkeyflower

Species

Diplacus aurantiacus (W. Curtis) Jeps. - orange bush monkeyflower

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