"Vinca seedling" refers to a young plant of the Vinca genus, commonly known as periwinkle. There are two main types of Vinca:

1. Vinca major and Vinca minor (trailing periwinkles) – perennial groundcovers.

2. Catharanthus roseus (commonly called annual vinca or Madagascar periwinkle) – often grown from seed for its colorful flowers.

Key Facts About Vinca Seedlings (Catharanthus roseus):

• Germination time: 10–21 days

• Ideal soil temp for germination: ~75–78°F (24–26°C)

• Light needs for germination: Preferably in darkness (cover lightly with soil)

• Seedling appearance:

  • Cotyledons (first leaves): Small, rounded or oval

  • True leaves: Glossy, green, elongated with a central vein

• Growth rate: Slow initially, then more vigorous in warm weather

• Transplanting time: When seedlings have 2–3 true leaves and are strong enough to handle

Care Tips for Vinca Seedlings:

• Light: Full sun to partial shade

• Water: Keep moist, but not soggy; they are drought-tolerant once established

• Soil: Well-draining, neutral to slightly acidic

• Fertilizer: Light feeding with a balanced fertilizer during growth phase