Bright Yellow Blooms
Produces cheerful yellow, daisy-like flowers that create a colorful display during the late summer and autumn seasons.
Helianthus Angustifolius Seeds for Sale
Suitable for home gardening use
Regular price
Rs. 16.99 INR
Sale price
Rs. 16.99 INR
Regular price
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Estimated Delivery:Nov 22 - Nov 26
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Product description
Helianthus Angustifolius Seeds
Helianthus Angustifolius, commonly known as Swamp Sunflower or Narrow-Leaved Sunflower, is a beautiful perennial flowering plant admired for its bright yellow, daisy-like blooms and slender green foliage. Native to North America, this ornamental sunflower typically flowers from late summer into autumn, bringing vibrant seasonal color to garden borders, pollinator gardens, and naturalized landscapes. Its attractive flowers provide a valuable nectar source for bees and butterflies, making it an excellent choice for wildlife-friendly gardens.
Swamp Sunflower
Yellow Flowers
Perennial Wildflower
Pollinator Friendly
Key Features
Narrow Green Foliage
Features distinctive slender, lance-shaped leaves that provide an elegant texture and attractive green backdrop.
Tall Perennial Growth
Develops upright flowering stems that can reach approximately 5 to 8 feet tall under favorable growing conditions.
Pollinator Attraction
Its nectar-rich flowers attract bees, butterflies, and other beneficial pollinators to outdoor planting spaces.
Product Highlights
Vibrant golden-yellow daisy-like flowers
Commonly known as Swamp Sunflower
Botanical name: Helianthus angustifolius
Long, narrow green foliage
Late summer and autumn flowering
Attracts bees and butterflies
Suitable for perennial garden borders
Thrives in moist growing conditions
Specifications
| Scientific Name | Helianthus angustifolius |
| Common Name | Swamp Sunflower; Narrow-Leaved Sunflower |
| Plant Family | Asteraceae |
| Seed Type | Flower Seeds |
| Plant Type | Herbaceous Perennial Wildflower |
| Growth Habit | Upright, clump-forming, spreading perennial |
| Flower Color | Bright Yellow with Yellow to Darker Central Discs |
| Blooming Season | Late Summer to Autumn |
| USDA Hardiness Zones | 5a–9b |
| Planting Season | Spring, after the danger of frost has passed |
| Seed Starting | Start in containers or sow directly into prepared soil when conditions are suitable |
| Germination Time | Varies with seed quality, temperature, and growing conditions |
| Germination Temperature | Follow supplier-specific seed-starting instructions |
| Sunlight | Full Sun; tolerates Partial Shade |
| Soil Requirements | Moisture-retentive, well-drained sandy, loamy, or clay soil |
| Watering | Moderate to regular watering; maintain soil moisture during dry periods |
| Mature Plant Height | Approximately 5–8 feet under favorable conditions |
| Mature Plant Spread | Approximately 2–4 feet, depending on growing conditions |
| Plant Spacing | Approximately 18–24 inches, allowing sufficient room for spreading |
| Wildlife Attraction | Bees, butterflies, and seed-eating birds |
Growing Guide
Step 1: Choose the Right Planting Location
Select a sunny outdoor location that receives at least 6 hours of direct sunlight daily. Swamp Sunflower performs best in full sun, although it can tolerate partial shade. Choose a location with enough space for its tall stems and spreading growth habit.
Select a sunny outdoor location that receives at least 6 hours of direct sunlight daily. Swamp Sunflower performs best in full sun, although it can tolerate partial shade. Choose a location with enough space for its tall stems and spreading growth habit.
Step 2: Prepare the Soil
Prepare loose, fertile soil that retains moisture while allowing excess water to drain. Swamp Sunflower adapts to sandy, loamy, and clay soils and generally performs well in consistently moist growing conditions.
Prepare loose, fertile soil that retains moisture while allowing excess water to drain. Swamp Sunflower adapts to sandy, loamy, and clay soils and generally performs well in consistently moist growing conditions.
Step 3: Sow the Seeds
Sow the seeds in prepared garden soil or starting containers according to the supplier's recommended sowing depth. Cover lightly with soil if instructed and maintain suitable moisture during germination. Avoid burying seeds too deeply.
Sow the seeds in prepared garden soil or starting containers according to the supplier's recommended sowing depth. Cover lightly with soil if instructed and maintain suitable moisture during germination. Avoid burying seeds too deeply.
Step 4: Water and Maintain Seedlings
Water gently to maintain consistent soil moisture while seedlings become established. Provide adequate sunlight and avoid prolonged waterlogging. Gradually acclimatize indoor-grown seedlings before transplanting outdoors.
Water gently to maintain consistent soil moisture while seedlings become established. Provide adequate sunlight and avoid prolonged waterlogging. Gradually acclimatize indoor-grown seedlings before transplanting outdoors.
Step 5: Encourage Flowering and Healthy Growth
Allow plants sufficient growing space and provide support if tall stems become unstable in windy locations. Pruning the stems in early summer can encourage branching and a fuller growth habit. Enjoy the bright yellow flowers during the late summer and autumn season.
Allow plants sufficient growing space and provide support if tall stems become unstable in windy locations. Pruning the stems in early summer can encourage branching and a fuller growth habit. Enjoy the bright yellow flowers during the late summer and autumn season.
Bring Autumn Sunshine to Your Garden with Swamp Sunflower
Add natural beauty and seasonal color to your outdoor space with Helianthus Angustifolius Seeds. Featuring cheerful yellow flowers, elegant narrow foliage, and impressive perennial growth, Swamp Sunflower is a wonderful addition to pollinator gardens, wildlife-friendly landscapes, and perennial borders. Grow these beautiful sunflowers and enjoy their attractive autumn blooms while welcoming bees and butterflies into your garden.
Frequently Asked Questions
Explore helpful answers about Swamp Sunflower seeds, germination, flowering, and growing requirements.
How do you grow Helianthus angustifolius from seeds?
Start Helianthus angustifolius seeds in prepared seed-starting containers or directly in suitable garden soil. Follow the supplier's recommended sowing depth and maintain consistent moisture during germination. Once seedlings are established, provide plenty of sunlight and transplant them outdoors when weather conditions are suitable.
Does Swamp Sunflower grow well in wet or waterlogged soil?
Swamp Sunflower naturally grows in moist habitats and tolerates occasionally wet soil better than many garden sunflowers. It can also grow in ordinary garden soil when adequate moisture is provided. Although it tolerates wet conditions, ensure the planting site supports healthy root growth and avoid prolonged stagnant water in containers.
When does Helianthus angustifolius bloom, and how can I encourage more flowers?
Helianthus angustifolius generally produces its bright yellow flowers from late summer into autumn. For abundant flowering, grow it in a location receiving full sunlight, maintain suitable soil moisture, and provide enough room for healthy growth. Cutting the stems back in early summer can encourage branching and a fuller plant with more flowering stems.