Helianthus Angustifolius Seeds - Flower Plant

Helianthus Angustifolius Seeds produce a perennial flowering plant commonly known in the United States as swamp sunflower. Plants develop upright stems with narrow green leaves and produce bright yellow daisy-like flowers. This plant thrives in full sun with moist, well-drained soils and is suitable for garden beds, borders, or naturalized wetland areas in temperate climates. Swamp sunflower is tolerant of damp conditions and attracts pollinators such as bees and butterflies.

Features

• Perennial flowering plant

• Upright growth with narrow leaves

• Produces bright yellow daisy-like flowers

• Suitable for garden beds, borders, and wetland plantings

• Adapted to full sun and moist, well-drained soil

Specifications

• Scientific Name: Helianthus angustifolius

• Common Name (US): Swamp Sunflower

• Seed Type / Variety: Perennial flowering plant

• Growth Habit: Upright perennial

• USDA Zones: 4–9

• Planting Season: Early spring

• Growing Season: Spring to fall

• Sowing Season:

  • March–May

• Germination Time and Conditions: 10–21 days at 65–75°F (18–24°C)

• Sunlight Requirements: Full sun

• Soil Requirements: Moist, well-drained fertile soil, pH 6.0–7.5

• Watering Needs: Moderate to high; tolerates wet conditions

• Mature Plant Size: 3–6 feet height; 2–4 feet spread

• Plant Spacing: 18–24 inches apart