North America Native Plant

Tricolor Monkeyflower

Botanical name: Mimulus tricolor

USDA symbol: MITR3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Eunanus coulteri Harv. & A. Gray ex Benth. (EUCO26)  âš˜  Eunanus tricolor (Hartw. ex Lindl.) Greene (EUTR6)   

Tricolor Monkeyflower: A Charming Native Annual for Wet Gardens If you’re looking to add some cheerful color to those perpetually damp spots in your garden, meet the tricolor monkeyflower (Mimulus tricolor). This delightful native annual might just be the perfect solution for those tricky wet areas where many other plants ...

Tricolor Monkeyflower: A Charming Native Annual for Wet Gardens

If you’re looking to add some cheerful color to those perpetually damp spots in your garden, meet the tricolor monkeyflower (Mimulus tricolor). This delightful native annual might just be the perfect solution for those tricky wet areas where many other plants struggle to thrive.

What Makes Tricolor Monkeyflower Special

The tricolor monkeyflower is a true native treasure, naturally occurring in California and Oregon. As its common name suggests, this charming little plant produces flowers that showcase three distinct colors – typically a sunny yellow center with white and purple or pink accents. These small but eye-catching blooms create a delightful carpet of color that’s sure to brighten up any wetland garden or naturalized area.

This native annual belongs to the forb family, meaning it’s a non-woody flowering plant that completes its entire life cycle in a single growing season. Don’t let its annual nature fool you though – tricolor monkeyflower has a wonderful habit of self-seeding, often returning year after year once established.

Why Grow Tricolor Monkeyflower?

There are several compelling reasons to consider adding this native beauty to your landscape:

  • Perfect for challenging wet spots where other plants fail
  • Supports local ecosystems and native pollinators
  • Self-seeds readily, providing long-term garden value
  • Adds unique three-toned color to wildflower displays
  • Requires minimal maintenance once established
  • Helps with erosion control in wet areas

Ideal Growing Conditions

As an obligate wetland species, tricolor monkeyflower has very specific moisture requirements. This plant almost always occurs in wetland conditions in both the Arid West and Western Mountains regions, so consistent moisture is absolutely essential for success.

The ideal growing conditions include:

  • Consistently moist to wet soil
  • Full sun to partial shade
  • Cool, moist conditions during germination and early growth
  • Well-draining soil that doesn’t become waterlogged

Perfect Garden Settings

Tricolor monkeyflower shines in several types of garden settings:

  • Rain gardens and bioswales
  • Native plant wildflower meadows
  • Pond or water feature edges
  • Bog gardens
  • Naturalized wetland areas
  • Low-lying areas that collect water

Planting and Care Tips

Growing tricolor monkeyflower successfully is all about timing and moisture management:

When to Plant: Direct sow seeds in fall or early spring when soil temperatures are cool. Fall planting often produces the best results as seeds get natural stratification over winter.

Seeding: Scatter seeds directly on prepared, moist soil surface. These tiny seeds need light to germinate, so avoid burying them deeply.

Watering: Keep soil consistently moist throughout the growing season. This is non-negotiable for this wetland species.

Maintenance: Once established, tricolor monkeyflower requires very little care beyond consistent watering. Allow plants to go to seed for natural reseeding.

Wildlife and Pollinator Benefits

Native plants like tricolor monkeyflower play important roles in supporting local wildlife. The small, colorful flowers attract various pollinators including native bees and beneficial insects. As part of a native plant community, it helps create habitat corridors that support broader ecosystem health.

Is Tricolor Monkeyflower Right for Your Garden?

This native annual is an excellent choice if you have consistently moist to wet areas in your garden and want to support local ecosystems with native plants. However, it’s not suitable for dry or drought-prone locations, as its wetland nature means it simply cannot tolerate dry conditions.

Consider tricolor monkeyflower if you’re creating a native plant garden, establishing a rain garden, or looking to naturalize wet areas on your property. Its cheerful three-colored blooms and low-maintenance nature make it a delightful addition to any wetland garden setting.

With its native status, pollinator appeal, and unique beauty, tricolor monkeyflower proves that native plants can be both ecologically beneficial and aesthetically pleasing – especially when grown in their preferred wet garden conditions.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Arid West

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Western Mountains, Valleys, and Coast

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Tricolor 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

Mimulus L. - monkeyflower

Species

Mimulus tricolor Hartw. ex Lindl. - tricolor monkeyflower

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