Also known as Britton's Wild Petunia · Desert Petunia · Mexican Blue-Bells
Mexican Ruellia (Ruellia simplex) is a vibrant, fast-growing perennial known for its profuse trumpet-shaped flowers in shades of purple, pink, or white.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering, but tolerates partial shade.
Moderate
50% intensity
Keep soil consistently moist, but not waterlogged. Allow top inch to dry between waterings.
Well-drained
50% intensity
Warm
75% intensity
Thrives in temperatures between 18-24°C. Protect from frost; bring indoors if temperatures drop below 10°C.
Moderate
50% intensity
Feed monthly during growing season with diluted balanced liquid fertilizer.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly, allowing the soil to dry slightly between waterings. Mexican Ruellia prefers consistently moist soil but can tolerate brief dry spells. Avoid waterlogging, as this can lead to root rot.
Deep watering encourages stronger root development, especially during hot, dry periods.
Prune annually in late winter or early spring to shape the plant and encourage bushier growth. Deadhead spent flowers to promote continuous blooming throughout the season.
Heavy pruning can be done to rejuvenate overgrown plants, cutting them back by about one-third to one-half.
Easily propagated from stem cuttings taken in spring or summer. Roots readily in water or moist potting mix. Division of established clumps is also an effective method, best done in spring.
Seeds can also be sown, though plants may not come true to type.
Repot every 2-3 years or when the plant becomes root-bound. Spring is the ideal time for repotting. Choose a pot one size larger with good drainage. Use a well-draining potting mix.
This process revitalizes the plant and provides fresh nutrients.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Mexican Ruellia (Ruellia simplex)
Where Mexican Ruellia (Ruellia simplex) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Lamiales |
| Family | Acanthaceae |
| Genus | Ruellia |
| Species | Ruellia simplex |
Similar in genus Ruellia
Answers based on plant encyclopedia data
