Swamp Sunflower
Helianthus angustifolius
1 Gallon | Hardiness Zones 6-9
The name does the plant no favors. "Swamp sunflower" conjures boggy ground and standing water, which is where you find it in the wild, yes, but which is not where you need to plant it in the garden. Helianthus angustifolius tolerates wet soils in nature because wet soils are where it manages to grow without being outcompeted. In the garden, given good sun and average moisture, it performs considerably better and does not require a drainage problem to justify its presence. The name is a provenance note, not a planting instruction.
What the plant actually is: one of the best late-season natives available to Southern and mid-Atlantic gardeners, blooming from October through November at the precise moment when the rest of the border has exhausted itself. The flowers are classic sunflower in form, 2 to 3 inches across, with clear yellow rays surrounding a deep purplish-brown disc — the color combination that looks as if it was designed for October specifically, which in a biological sense it was. On a mature plant in full flower, the display is not subtle. Stems can reach 6 to 8 feet and branch freely in the upper third, so a well-sited colony becomes a mass of yellow that carries from across the garden.
The ecological credentials are worth knowing. The bloom period overlaps directly with the Monarch migration, and the nectar is relied upon by southbound butterflies refueling along the Eastern Flyway. The plant is also a larval host for several checkerspot and painted lady butterfly species. The seeds that follow are small but oil-rich, and songbirds, quail, and mourning doves work through the spent flower heads through winter. Leaving the stems standing until late winter costs nothing and returns something measurable to the local food web.
Helianthus angustifolius spreads by rhizome to form colonies over time, which is either useful or something to manage depending on what you want from it. Either way, a colony in October is worth the conversation.
Pickup available at Aiken Nursery
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| Hardiness Zones | USDA Zones 6-9 |
| Sun | Full Sun |
| Soil | Well-drained and Moist |
| Mature size | Height: 8-10 Feet / Spread: 2-4 Feet |
| Growth Rate | Fast |
| Seasonality | Dies back, depends on zone |
Flower, Fruit and Foliage
Yellow, daisy like
Here’s a closer look at how we produce our plants:
From rooting to shipping, our top priority is ensuring you receive healthy, thriving plants for your garden’s success.
The majority of our plants are carefully cultivated from rooted cuttings, while we also utilize propagation methods such as seed, air layering, and grafting, thoughtfully chosen to suit each plant’s unique needs.
Our plants are cultivated using sustainable practices, including organic soil blends and eco-friendly pest management, ensuring they thrive while minimizing environmental impact.
We are proud to contribute to local biodiversity through ongoing donations to the Aiken Arboretum and support for local wildlife conservation efforts, helping to preserve and enhance our community’s natural ecosystems.
Frequently Asked Questions
What to expect upon delivery
All our plants are sold in 1-gallon sizes, though the height of each plant can vary depending on its growth rate and seasonality, typically ranging from 1/2 to 2.5 feet.
Each plant is carefully packaged with its roots enclosed in a secure plastic bag containing moist soil, forming a compact root ball. To ensure safe transport, the box is padded with recycled newspaper, providing both stability and eco-friendly protection from weather during shipping.
What is your return policy?
Review our full return policy information on our SHIPPING AND RETURNS POLICY page.
What payment methods can I use?
We offer 35 different payment methods including major providers like Mastercard, Visa, PayPal, American Express and Diners as well as many different local payment methods including Klarna, iDEAL, AliPay, Sofort, giropay, and many more.
Can I make changes to my order after it’s been placed?
At Woodlanders, we strive to fulfill orders as quickly as possible. Therefore, we can only accommodate changes to your order within the first 24 hours after it has been placed. These changes include adding or removing products and modifying the delivery address. If you need to make any changes or if there has been a mistake with your order information, please reach out to us promptly via our CONTACT page with your order number for the quickest resolution.
Your satisfaction is our priority, and we appreciate your understanding and cooperation.