100 Swamp Sunflower Seeds Helianthus angustifolius Wetland Wildflower Rain Garden

Swamp Sunflower (Helianthus angustifolius) is a tall, clump-forming native perennial known for its late-season display of bright golden blooms. A striking addition to wet meadows, rain gardens, and naturalized landscapes, it brings reliable color when most other flowers have finished for the year.

The narrow, willow-like foliage forms dense upright clumps that work well toward the back of a border or along pond edges and low spots where the soil stays moist. The daisy-like flowers open in late summer into autumn and are attractive in cut arrangements. Plant in consistently moist to wet ground for best performance.
Species: Helianthus angustifolius
Type: Herbaceous perennial
Plant_Habit: Upright clump-forming
Sun: Full sun to part shade
Soil: Moist to wet, well-draining to boggy
Days_to_Harvest: Not applicable
Zones: 5-9
Germination: 10-21 days at 65-70F
Sowing: Surface sow, lightly press into soil; light aids germination
Spacing: 18-24 inches
Notes: Native to wetland habitats; tall stems may benefit from staking in exposed sites