Sunflower Seeds – Swamp

Swamp Sunflower (Helianthus angustifolius) is a hardy perennial variety known for its bright golden-yellow blooms and tall, graceful stems. Ideal for garden beds and borders, it attracts pollinators such as bees and butterflies, enhancing biodiversity in outdoor spaces. This late-blooming sunflower variety offers vibrant color when many other plants have faded, making it an excellent choice for cut flower arrangements and pollinator gardens.

Features and Specifications:

• Plant Type: Perennial flowering plant

• Botanical Name: Helianthus angustifolius

• Common Name: Swamp Sunflower

• Growth Habit: Upright and branching, grows 4–6 feet tall

• Bloom Color: Bright yellow with dark centers

• Maturity: Blooms in 90–110 days from sowing

• Growing Season: Late summer to fall

• USDA Hardiness Zones: 6–9 (can be grown annually in cooler zones)

• Sowing Months:

  • Zones 8–9: February–April or September–October

  • Zones 6–7: March–May

  • Zones 4–5: April–June

• Light Requirements: Full sun

• Soil Needs: Moist, well-drained soil; tolerates clay and sandy conditions

• Watering: Moderate; prefers consistent moisture

• Uses: Garden borders, pollinator gardens, cut flower arrangements, and landscape plantings