Also known as Longtube Four O'clock · شب الليل · لاله عباسی
Sweet Four O'clock (Mirabilis longiflora) is a perennial native to southwestern North America, known for its fragrant, trumpet-shaped white flowers that open in the late
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade
75% intensity
Blooms best in at least 6 hours of direct sunlight daily.
Allow soil to dry slightly between waterings
50% intensity
Prefers well-drained soil; avoid waterlogged conditions.
Well-drained
50% intensity
Warm to average
75% intensity
Thrives in temperatures between 18-24°C; can tolerate higher.
Outdoor
50% intensity
Low
25% intensity
Requires minimal feeding; fertilize sparingly in spring.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water deeply when the top 2-3 cm of soil feels dry. Avoid overwatering, as Mirabilis longiflora prefers slightly drier conditions once established.
Reduce watering during cooler months or when the plant is dormant to prevent root rot. Ensure good drainage.
Prune back plants in early spring to encourage bushier growth and more blooms. Deadhead spent flowers throughout the blooming season to promote continuous flowering.
Cut back to the ground after the first frost to prepare for winter dormancy.
Propagate from seeds sown directly outdoors after the last frost or start indoors a few weeks prior. Division of established clumps in spring is also an effective method.
Seeds can be nicked or soaked to improve germination rates.
Repot young plants annually or every two years in spring. Choose a pot that is only slightly larger than the current one. Ensure the new pot has excellent drainage holes.
Use a well-draining potting mix, and water thoroughly after repotting.
Identify plants like this with ePlant AI
Snap a photo to get care tips and match similar species on the go.
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Sweet Four O'clock (Mirabilis longiflora)
Where Sweet Four O'clock (Mirabilis longiflora) is found
Density
Tap map to explore
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Caryophyllales |
| Family | Nyctaginaceae |
| Genus | Mirabilis |
| Species | Mirabilis longiflora |
Similar in genus Mirabilis
Answers based on plant encyclopedia data
