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Slow Growth in Catharanthus
verifiedReviewed by the GreenScout Team
Catharanthus, commonly called vinca or Madagascar periwinkle, is a heat- and drought-tolerant tender annual with glossy foliage and attractive five-petaled flowers in shades of pink, purple, red, or white
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Catharanthus care requirements
These care conditions are most relevant to slow growth in Catharanthus. Check each one as a potential cause.
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Light
Full sun (6+ hours daily); tolerates light shade but flowers best in strong sunlight
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Fertiliser
Light feeding every 4–6 weeks during growing season; excessive fertility reduces flowering
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Temperature
Warm to hot; 70–85°F ideal; dies at first frost (tender annual)
symptoms
Symptoms to look for in Catharanthus
- fiber_manual_recordLittle to no new growth
- fiber_manual_recordStagnant development
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Common causes in Catharanthus
- fiber_manual_recordLow light
- fiber_manual_recordPoor nutrition
- fiber_manual_recordRoot-bound
- fiber_manual_recordWrong season
- fiber_manual_recordOverwatering
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How to diagnose slow growth in Catharanthus
Assess light levels, feeding schedule, and pot size.
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How to treat slow growth in Catharanthus
Move to brighter spot. Feed regularly during growing season. Repot if root-bound.
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Preventing slow growth in Catharanthus
Regular feeding. Adequate light. Annual pot size check.