Bright Yellow Flowers
Produces cheerful golden-yellow daisy-like flowers with darker central discs that create a beautiful display during the late growing season.
Hardy Perennial Swamp Sunflower 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 21 - Nov 25
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Product description
Hardy Perennial Swamp Sunflower Seeds
Hardy Perennial Swamp Sunflower, scientifically known as Helianthus angustifolius, is a beautiful flowering perennial admired for its bright golden-yellow daisy-like blooms and slender green foliage. Also called Narrow Leaf Sunflower, this attractive plant produces abundant flowers during late summer and autumn, bringing vibrant seasonal color to garden borders, pollinator gardens, and naturalized landscapes. It grows particularly well in sunny locations with consistently moist soil and can attract bees and butterflies when in bloom. Its perennial growth habit makes it a wonderful choice for gardeners looking to enjoy returning seasonal flowers.
Swamp Sunflower
Perennial Flower
Golden Yellow Blooms
Pollinator Friendly
Key Features
Perennial Growth Habit
Returns year after year in suitable growing climates, providing recurring flowering interest without requiring complete replanting every season.
Attracts Pollinators
Its nectar and pollen-rich flowers attract bees, butterflies, and other beneficial garden visitors.
Moisture-Loving Plant
Naturally suited to moist growing environments and can perform well in rain gardens and suitable landscape areas with consistent soil moisture.
Product Highlights
Scientific name: Helianthus angustifolius
Bright golden-yellow daisy-like flowers
Hardy herbaceous perennial
Also known as Narrow Leaf Sunflower
Attracts bees and butterflies
Excellent for pollinator gardens
Thrives in moist to occasionally wet soil
Late summer to autumn flowering
Suitable for garden borders and naturalized areas
Can spread through underground rhizomes
Specifications
| Scientific Name | Helianthus angustifolius |
| Common Name | Swamp Sunflower; Narrow Leaf Sunflower |
| Plant Family | Asteraceae |
| Seed Type | Perennial Ornamental Flower Seeds |
| Plant Type | Herbaceous Perennial Flowering Plant |
| Growth Habit | Upright, Clump-Forming and Spreading |
| Flower Color | Golden Yellow with Dark Brown to Purplish Centers |
| Blooming Season | Late Summer to Autumn |
| USDA Hardiness Zones | Approximately 5a–9b |
| Planting Season | Spring to Early Summer, after frost risk has passed |
| Seed Starting | Start indoors or sow outdoors in suitable warm soil |
| Germination Time | Approximately 7–21 days under suitable conditions; varies by seed lot |
| Germination Temperature | Approximately 18–24°C (65–75°F) |
| Sunlight | Full Sun to Partial Shade; full sun encourages better flowering |
| Soil Requirements | Moisture-Retentive, Well-Drained Loam, Sandy or Clay Soil |
| Soil pH | Generally Acidic to Slightly Alkaline |
| Watering | Regular Watering; Maintain Consistent Soil Moisture |
| Mature Plant Height | Approximately 3–8 Feet, Depending on Growing Conditions |
| Mature Plant Spread | Approximately 2–4 Feet or More Under Favorable Conditions |
| Plant Spacing | Approximately 18–24 Inches, Allowing Room for Spreading |
| Propagation | Seeds, Division and Underground Rhizomes |
Growing Guide
Step 1: Choose the Right Planting Location
Select a sunny garden location that receives approximately 6 or more hours of direct sunlight daily. Swamp Sunflower can tolerate partial shade, but full sunlight generally encourages more abundant flowering. Choose an area with enough room for its tall stems and spreading growth habit.
Select a sunny garden location that receives approximately 6 or more hours of direct sunlight daily. Swamp Sunflower can tolerate partial shade, but full sunlight generally encourages more abundant flowering. Choose an area with enough room 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 tolerates different soil types, including sandy, loamy, and clay soils, provided the growing conditions are suitable. Remove weeds and loosen the soil before sowing.
Prepare loose, fertile soil that retains moisture while allowing excess water to drain. Swamp Sunflower tolerates different soil types, including sandy, loamy, and clay soils, provided the growing conditions are suitable. Remove weeds and loosen the soil before sowing.
Step 3: Sow the Seeds
Sow the seeds according to the supplier's instructions. If starting indoors, use a suitable seed-starting mix and maintain consistent moisture. If sowing outdoors, plant after frost risk has passed and soil temperatures have become suitable for germination. Avoid burying small seeds too deeply.
Sow the seeds according to the supplier's instructions. If starting indoors, use a suitable seed-starting mix and maintain consistent moisture. If sowing outdoors, plant after frost risk has passed and soil temperatures have become suitable for germination. Avoid burying small seeds too deeply.
Step 4: Water and Care for Seedlings
Keep the growing medium consistently moist during germination and early seedling development. Avoid allowing the soil to dry out completely. Once seedlings become established, continue regular watering, particularly during hot or dry weather.
Keep the growing medium consistently moist during germination and early seedling development. Avoid allowing the soil to dry out completely. Once seedlings become established, continue regular watering, particularly during hot or dry weather.
Step 5: Encourage Healthy Flowering
Transplant established seedlings into their final growing location with sufficient spacing. Pinching or cutting back young plants in early summer can encourage branching and a fuller appearance. Tall plants may benefit from staking in windy locations. Allow the plant to flower in late summer and autumn, and monitor rhizome spreading where containment is necessary.
Transplant established seedlings into their final growing location with sufficient spacing. Pinching or cutting back young plants in early summer can encourage branching and a fuller appearance. Tall plants may benefit from staking in windy locations. Allow the plant to flower in late summer and autumn, and monitor rhizome spreading where containment is necessary.
Bring Golden Autumn Beauty with Hardy Perennial Swamp Sunflower
Add lasting seasonal color to your garden with Hardy Perennial Swamp Sunflower. Its cheerful golden-yellow flowers, attractive narrow foliage, and pollinator-friendly blooms make it a wonderful addition to perennial borders, wildlife gardens, and moisture-friendly landscapes. With plenty of sunlight, consistent soil moisture, and appropriate growing space, this beautiful perennial can reward your garden with spectacular seasonal blooms year after year.
Frequently Asked Questions
Discover helpful answers about growing, flowering, and caring for Hardy Perennial Swamp Sunflower Seeds.
How long does it take for Swamp Sunflower seeds to germinate?
Swamp Sunflower seeds may germinate in approximately 7–21 days under favorable conditions, although the actual time depends on seed freshness, temperature, moisture, and growing medium. Maintaining consistent moisture and suitable warmth can help support successful seed germination.
Does Swamp Sunflower come back every year after planting?
Yes. Helianthus angustifolius is a herbaceous perennial that can return year after year in suitable climates. The above-ground growth may die back during winter, while the established root system produces new shoots when favorable growing conditions return. It can also spread through underground rhizomes.
Can Swamp Sunflower grow in wet soil and attract butterflies?
Yes. Swamp Sunflower naturally grows in moist to occasionally wet environments and can also adapt to well-drained garden soil when adequate moisture is available. Its bright yellow flowers attract bees and butterflies, making it a valuable addition to pollinator-friendly gardens and naturalized landscapes.