Four O Clock - White

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White four o'clock (Mirabilis albida) is a herbaceous perennial plant that is native to North America. It is a member of the four o'clock family (Nyctaginaceae) and is known for its fragrant white flowers that bloom in the evening.

Four o'clock is a tall plant, typically growing 2 to 3 feet tall. It has erect stems with opposite, lance-shaped leaves. The flowers are borne in clusters at the top of the stems. Each flower has five petals and a central crown. The flowers are fragrant and bloom from late summer to early fall.

White four o'clock is a relatively easy plant to grow and is tolerant of a wide range of conditions. It prefers full sun and well-drained soil. It can be grown in gardens, meadows, and borders. White four o'clock is a valuable nectar source for butterflies and other pollinators.
Height 2–3 feet
Sunlight Full Sun to Partial Shade
Water Medium
Bloom Time Summer
Stratification Not Needed (24-hour water soak recommended)
Soil Well-drained
Attracts Moths (hawkmoths — flowers open at dusk), Hummingbirds

Mirabilis jalapa, also known as four-o'clock flower or marvel of Peru, is native to the dry tropical regions of Mexico, Guatemala, Chile, and Peru. It has been introduced for ornamental purposes and has become naturalized throughout tropical, subtropical, and temperate regions of the world.

In the United States, Mirabilis jalapa is considered invasive in some states. It is not native to any U.S. states.

Site Selection
Sunlight: Full sun to partial shade.
Soil: Well-drained; adaptable to most soil types.

Planting Outdoors
Sow after the last frost, once soil has warmed. Soak seeds in water for 24 hours before planting to speed germination. Sow 1/2 inch deep and space plants 12-18 inches apart.

Starting Seeds Indoors
Start 4-6 weeks before the last frost. Soak seeds 24 hours, then sow 1/2 inch deep in a well-draining mix. Germination takes 7-14 days.

Stratification & Scarification
Not needed; a 24-hour water soak before sowing improves and speeds germination.

Watering
Water regularly; tolerates both moist and moderately dry conditions once established.

Maintenance
Forms a tuberous root that can overwinter in mild climates. Deadhead or remove seed heads to help control self-seeding, particularly in regions where it is documented as invasive.

Four O Clock - White
Grow Level
Yes
Sprouts easily and is extremely hardy. Great for beginner gardeners of all levels!
US Heritage
Native Wildflower
A proud native US wildflower that bees and butterflies adore.
Winter Sleep (Cold Strat)
No Sleep Needed
Ready to sprout! Just plant in warm soil; no pre-chilling needed.
Best Planting Time
Early Spring or Fall
Sow in early spring for summer blooms, or in fall to let nature sow them.
Plant Nature
Perennial
Comes back year after year from the same deep roots!

Seasonal Sowing Advisor

Select the current season in your region to view clear instructions on optimal sowing and plant care activities.

Sprouting in the Springtime

Perfect time to sow! Plant these seeds in warm soil, keep the soil consistently moist but not waterlogged, and monitor for early sprouts.

  • Optimal Soil Temp: Sown seeds germinate best when soil temperatures reach 55 degrees F to 70 degrees F (13 degrees C to 21 degrees C).
  • Moisture Management: Keep the seedbed consistently moist but never soggy to prevent seed rot.
  • Sowing Tip: Mark your seedling rows or sowing areas with plant labels to monitor emergence and avoid accidental weeding.

Growing in the Summer Heat

Summer care: Water deeply in the morning so plants are hydrated before peak heat. Provide afternoon shade in extremely hot climates.

  • Watering Schedule: Water early in the morning to minimize evaporation and prevent fungal diseases.
  • Sun Exposure: Most native varieties thrive in full sun, but check species-specific requirements for heat stress.
  • Pollinator Benefit: Summer blooms act as critical nectar sources for bees, butterflies, and other essential pollinators.

Sowing in the Cool Autumn

Fall sowing: Scatter seeds directly onto clear soil before winter. The natural cold season will naturally stratify and prepare them for spring germination.

  • Direct Seeding: Scatter seeds directly over cleared soil. Press seeds firmly into the ground for optimal seed-to-soil contact.
  • Natural Moisture: Autumn rains and winter snow help settle seeds into the soil, initiating natural cold cycles.
  • Seed Harvesting: Collect mature seed heads from established plants to hand-sow in new areas or store for spring.

Dreaming in the Chilly Winter

Winter stratification: Outdoors, let the seeds undergo natural winter stratification under rain or snow. For early indoor starts, sow under grow lights.

  • Cold Stratification: Outdoor sowing relies on natural cold-moist winter cycles to break seed dormancy.
  • Indoor Starts: If starting early indoors, utilize seed trays under grow lights 6 to 8 weeks before the last frost date.
  • Sowing Tip: Protect outdoor winter-sown beds with light mulch or wire mesh to prevent disturbance by foraging birds or rodents.
Mirabilis jalapa
Four O'Clock White

Mirabilis jalapa, also known as four-o'clock flower or marvel of Peru, is native to the dry tropical regions of Mexico, Guatemala, Chile, and Peru. It has been introduced for ornamental purposes and has become naturalized throughout tropical, subtropical, and temperate regions of the world.

In the United States, Mirabilis jalapa is considered invasive in some states. It is not native to any U.S. states.

Testimonials

★★★★★

I love Native Sunflowers in my home garden and landscape.

Mary Hoggins
Tyler, Texas
★★★★★

Last year in the Fall, I collected a lot of seeds I planted this year.

Author's name
Dallas, Texas
★★★★★

They really added a big splash of color to the front of my house garden bed. Love them!

Audrey Long
Mobile, Alabama

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