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Helianthus angustifolius

Swamp Sunflower (Narrowleaf Sunflower)

  • »  Yellow petals surround a purplish-brown central disk
  • »  Narrow dark green leaves
  • »  Foliage hangs from hairy purplish-green stems
  • »  Good cut flower
  • »  Attracts birds, pollinators
  • »  Bloom Time: Late summer to fall
  • »  Flower Size: 5-7 cm

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  • Category:Perennials
  • Hardiness Zone:5
  • Height:150-240 cm
  • Spread:60-120 cm
  • Bloom Color: Yellow
Exposure
• Full Sun
• Partial Sun/Shade
Soil Moisture
• Moist to Average
• Well-drained
Attracts Wildlife
• Attracts Birds
• Attracts Butterflies
Attributes
• Native to Ontario
• Cut Flower/Foliage
Flowering Time
• Lt. Sum-Fall
• Fall
Habit
• Clumping
Foliage Color
• Green (dark)
Landscape uses
• Woodland/woods edge
Growing & Maintenance Tips for Helianthus angustifolius

Grow in partial sun or dappled sunlight, moist to average conditions, and a rich loamy soil. Naturalizes aggressively by seed and rhizome. Flowering is more prolific in long hot summers.