FLOWER SEED,HELONIAS bullata , Swamp Pink-Perennial

About Acmella oleracea (Toothache Plant)

Acmella oleracea, commonly known as the Toothache Plant or Spilanthes, is a striking tropical perennial prized for its vivid, cone-shaped yellow-and-red button flowers and its unique tingling, numbing sensation when chewed. Native to the tropics, it thrives in warm, humid climates and makes a bold addition to edible gardens, herb beds, and ornamental borders alike.

Growing Information

• Plant Type: Tender perennial (grown as annual in cooler climates)
• Hardiness Zones: 9–11 (perennial); Zones 3–8 (annual)
• Mature Height: 12–18 inches (30–45 cm)
• Spread: 12–24 inches (30–60 cm)
• Sun Exposure: Full sun to partial shade
• Soil: Moist, well-draining, fertile soil; tolerates a range of soil types
• Watering: Keep soil consistently moist; does not tolerate drought well
• Bloom Time: Summer through fall
• Days to Germination: 7–14 days at 70–75°F (21–24°C)

How to Grow from Seed

• Start Indoors: Sow seeds 6–8 weeks before the last frost date indoors
• Sowing Depth: Surface sow — press seeds lightly onto moist seed-starting mix; do not cover, as light aids germination
• Temperature: Maintain soil temperature of 70–75°F (21–24°C) for best germination
• Transplanting: Move seedlings outdoors after all frost risk has passed and nighttime temps stay above 55°F (13°C)
• Spacing: Space plants 12–18 inches apart to allow for spreading growth
• Fertilizing: Apply a balanced fertilizer monthly during the growing season to encourage lush foliage and prolific blooming

Uses

Acmella oleracea is both ornamental and functional. The flowers and leaves are used in traditional medicine and culinary applications — particularly in Caribbean and South American cuisines. The plant's natural analgesic compounds make it a fascinating addition to any herb garden.