Madagascar Periwinkle
Catharanthus roseus
An evergreen subshrub or herbaceous plant featuring glossy, dark green, opposite leaves and five-petaled flowers in shades of pink, white, or red, often with contrasting darker centers.
- Light
- Full sun to partial shade, requiring at least 6 hours of direct sunlight daily for optimal blooming.
- Water
- Moderate drought tolerance once established. Water thoroughly when the top inch of soil becomes dry, avoiding excessive moisture to prevent root issues.
- Growth
- Upright and bushy growth habit, typically reaching 1 to 2 feet in height with a similar spread. Growth rate is moderate.
Care instructions
Provide full sun to partial shade with well-draining soil. Allow the soil to dry slightly between waterings, as the plant is sensitive to overwatering and root rot. Feed monthly during the growing season with a balanced, water-soluble fertilizer.
Growing details
Sunlight
Full sun to partial shade, requiring at least 6 hours of direct sunlight daily for optimal blooming.
Watering
Moderate drought tolerance once established. Water thoroughly when the top inch of soil becomes dry, avoiding excessive moisture to prevent root issues.
Soil
Prefers loamy, sandy, or well-draining potting mixes with a neutral to slightly acidic pH range of 6.0 to 7.0.
Hardiness zone
USDA zones 9 through 11 as a perennial; frequently grown as an annual in cooler climates.
Growth habit
Upright and bushy growth habit, typically reaching 1 to 2 feet in height with a similar spread. Growth rate is moderate.
Bloom season
Blooms continuously from late spring until the first frost, producing flat-faced, five-lobed flowers in white, pink, rose, and red.
Propagation
Propagated easily from seeds sown in warm soil or through stem tip cuttings taken in spring or summer.
Common pests & issues
Susceptible to root rot and fungal leaf spots in overly damp conditions. Ensure good air circulation and avoid overhead watering to minimize fungal development.
Similar species
Impatiens, which can be distinguished by their succulent stems, serrated leaves, and irregular flower shapes with a distinct spur.