Illustration
Autumn Gold Narrow-Leaved Sunflower
Helianthus salicifolius 'Autumn Gold'
Also called autumn gold, autumn gold willowleaf sunflower and autumn gold willow-leaved sunflower
Autumn Gold Narrow-Leaved Sunflower blooms from September through November.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Autumn Gold Narrow-Leaved Sunflower
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 5–9. Expect it to reach about 24 in tall and 24 in wide at maturity, in roughly 2 years (a house reading).
Pets
- Not yet checked for pets.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
No toxicity note is on file for Autumn Gold Narrow-Leaved Sunflower. That is not a clearance: check its safety for people and pets before planting.
What was checked
Mature height and spread, hardiness zones, sun, water, bloom months and color and the trait tags were checked against named botanical sources for this plant, with what the sources could not settle written down; years to mature size rests on a recorded house rule where no publisher states one, and is marked so; its common name and alternate names have not been checked yet. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Autumn Gold Narrow-Leaved Sunflower
Plant Autumn Gold Narrow-Leaved Sunflower in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 7, the middle of its hardy zones 5 to 9, spring means March to May and fall means September or October. Once settled, it blooms from September to November.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 7, the middle of this plant's hardy range, start with zone 7 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Autumn Gold Narrow-Leaved Sunflower get?
24 intall5 ft 7 inan adult24 inwideSee Autumn Gold Narrow-Leaved Sunflower in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Autumn Gold Narrow-Leaved Sunflower
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Autumn Gold Narrow-Leaved Sunflower about 24 in apart, center to center, so each plant has room to reach its full width.
Add Autumn Gold Narrow-Leaved Sunflower to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Autumn Gold Narrow-Leaved Sunflower's height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases, pests and toxicity were checked against 11 published sources on October 5, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- Missouri Botanical Gardencultivar record, Helianthus salicifolius 'Autumn Gold'height, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil, diseases and pests
- Plant Addictsthe store the queue came from; its page says Brand: Proven Winnersheight, spread, hardiness zones, sun, water, bloom months and color, trait tags, soil and pests
- darwinperennials.comDarwin Perennials (the breeder and introducer; Ball Horticultural Comp...height, spread, hardiness zones, sun, water, bloom months and color, trait tags and diseases
- NC State ExtensionSPECIES page, Helianthus salicifolius, with a cultivar lineheight, hardiness zones, sun, water, bloom months and color, soil, diseases and pests
- North Creek Nurseriesa wholesale grower, Landenberg, Pennsylvania; it files Darwin Perennia...height, spread, hardiness zones, sun, water, bloom months and color, soil and pests
- Proven Winnersthe brand; it relays the breeder's figures, one voice with Darwin Pere...height, spread, hardiness zones, sun, water, bloom months and color, soil and pests
- Chicago Botanic Gardencultivar record; Glencoe, Illinoisheight, hardiness zones, sun, water, bloom months and color, trait tags and soil
- agsci.psu.eduPenn State Flower Trials, Southeast Agricultural Research & Extension...height, spread, hardiness zones, sun and bloom months and color
- US plant patent (Google Patents)the breeder's registration; assignee Ball Horticultural Coheight, spread, hardiness zones, bloom months and color and diseases
- agsci.psu.eduPenn State Flower Trials, Southeast Agricultural Research & Extension...height, spread and bloom months and color
- ASPCAAnimal Poison Controltoxicity
How the checking works, and what each standard covers, is on the verified plants page.
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.