Madagascar Periwinkle Seeds (Catharanthus roseus) produce flowering plants known for glossy leaves and vibrant blooms. These plants grow well in sunny to partially shaded locations with well-drained soil and moderate watering. Suitable for garden beds, borders, and container planting, periwinkle develops compact foliage and continuous flowers during the growing cycle. The plant adapts to indoor and outdoor environments and maintains steady blooming. These seeds are suitable for gardeners interested in growing long-flowering plants for decorative garden and container use.