North America Native Plant

Colorado Four O’clock

Botanical name: Mirabilis multiflora var. multiflora

USDA symbol: MIMUM

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Quamoclidion cordifolium Osterh. (QUCO8)  âš˜  Quamoclidion multiflorum Torr. (QUMU6)   

Colorado Four O’Clock: The Evening Star of Native Gardens If you’re looking for a native plant that puts on a spectacular show just when most flowers are calling it quits for the day, meet the Colorado four o’clock (Mirabilis multiflora var. multiflora). This charming southwestern native has earned its common ...

Colorado Four O’Clock: The Evening Star of Native Gardens

If you’re looking for a native plant that puts on a spectacular show just when most flowers are calling it quits for the day, meet the Colorado four o’clock (Mirabilis multiflora var. multiflora). This charming southwestern native has earned its common name by opening its vibrant flowers in the late afternoon, creating a magical evening display that’ll have you timing your garden visits around happy hour.

A True Southwestern Native

The Colorado four o’clock is proudly native to the lower 48 states, specifically calling the American Southwest home. You’ll find this hardy perennial naturally growing across Arizona, Colorado, Nevada, New Mexico, Texas, and Utah, where it has adapted beautifully to the region’s challenging growing conditions.

What Makes This Plant Special

This delightful forb (that’s garden-speak for a non-woody flowering plant) brings several unique qualities to your landscape:

  • Stunning magenta-pink tubular flowers that open in late afternoon and evening
  • Heart-shaped leaves that provide attractive foliage even when not in bloom
  • Low, spreading growth habit perfect for ground cover
  • Incredible drought tolerance once established
  • Long blooming season throughout the warmer months

Perfect for Evening Garden Enjoyment

Here’s where the Colorado four o’clock really shines – it’s designed for evening entertainment. While most flowers close up shop as the sun sets, this beauty is just getting started. The flowers open in late afternoon (hence the four o’clock name) and stay open through the night, making it perfect for gardeners who want to enjoy their outdoor spaces after work or during evening gatherings.

Pollinator Powerhouse

The timing of this plant’s blooms isn’t just convenient for us humans – it’s a lifeline for evening pollinators. Colorado four o’clocks are particularly beloved by sphinx moths and hummingbirds, providing crucial nectar sources during evening and nighttime hours when many other flowers have closed. This makes it an excellent choice for pollinator gardens focused on supporting diverse pollinator communities.

Where and How to Grow Colorado Four O’Clock

This adaptable native thrives in USDA hardiness zones 4 through 9, making it suitable for a wide range of climates. Here’s what you need to know about growing conditions:

  • Sunlight: Full sun to partial shade (at least 6 hours of direct sunlight preferred)
  • Soil: Well-drained soils of almost any type – this plant isn’t picky!
  • Water: Drought tolerant once established; minimal watering needed
  • Maintenance: Low maintenance – just occasional deadheading to encourage more blooms

Ideal Garden Settings

Colorado four o’clock is a natural fit for several garden styles:

  • Xeriscape and drought-tolerant gardens
  • Native plant gardens
  • Desert and southwestern-themed landscapes
  • Evening gardens designed for after-work enjoyment
  • Pollinator gardens, especially those supporting night-flying species
  • Border plantings and ground cover applications

Planting and Care Tips

Getting your Colorado four o’clock established is refreshingly straightforward:

  • Plant in spring after the last frost date in your area
  • Space plants according to their mature spread (typically 2-3 feet apart)
  • Water regularly during the first growing season to help establish roots
  • Once established, water only during extended dry periods
  • Deadhead spent flowers to encourage continued blooming
  • In colder zones, plants may die back to the ground in winter but will return in spring

Why Choose This Native Beauty

Beyond its obvious aesthetic appeal and evening show, Colorado four o’clock offers practical benefits that make it a smart choice for modern gardens. Its drought tolerance means lower water bills and less maintenance time. Its native status means it supports local ecosystems and wildlife. And its unique blooming time adds dimension to your garden experience, encouraging you to spend time outdoors during the peaceful evening hours.

Whether you’re creating a water-wise landscape, supporting pollinators, or simply want a plant that blooms when you’re home to enjoy it, Colorado four o’clock delivers on all counts. This native gem proves that the best garden performers are often those that have spent centuries perfecting their act in the wild.

Colorado Four O’clock

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Nyctaginaceae Juss. - Four o'clock family

Genus

Mirabilis L. - four o'clock

Species

Mirabilis multiflora (Torr.) A. Gray - Colorado four o'clock

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