Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Audio Play Icon Headphones Icon Plus Icon Minus Icon Check Icon Print Icon Note Icon Heart Icon Filled Heart Icon Single Arrow Icon Double Arrow Icon Hamburger Icon TV Icon Close Icon Sorted Hamburger/Search Icon

The Plant Guide

Browse the Full Plant Guide

Swamp sunflower

Helianthus angustifolius

hee-lee-AN-thus an-gus-tih-FOE-lee-us Audio

A profusion of golden yellow flowers appears for two to three weeks starting in early autumn. Daisy-like flowerheads are 3 inches across with 15 to 20 yellow ray florets radiating from a flat-topped purple or dark brown cone. The entire plant looks like a giant flame, drawing the attention of gardeners and many species of butterflies, bees, and other nectar feeders.

Noteworthy CharacteristicsThis tall U.S. native is great for a perennial border, meadow, or butterfly garden.

CareGrow in full sun and moist but well-drained, moderately fertile, humus-rich soil. Needs ample moisture. May require support.

PropagationDivide in spring or autumn. Root basal cuttings in spring. Or start from seed.

ProblemsCommon: downy mildew, powdery mildew, canker, rust, and many fungal leaf spots. Also susceptible to damage from caterpillars, cutworms, beetles, and weevils.

  • Genus : Helianthus
  • Plant Height : 3 to 6 feet
  • Plant Width : 3 to 6 feet
  • Zones : 6, 7, 8, 9
  • Bloom Time : Fall
  • Plant Seasonal Interest : Fall Interest
  • Light : Full Sun
  • Moisture : Medium Moisture
  • Growth Rate : Moderate
  • Maintenance : Moderate
  • Plant Type : Perennials
  • Flower Color : Yellow
View Comments

Comments

Log in or create an account to post a comment.

Related Plants

Related Articles

More From the Plant Guide

Winter Interest

Partial Shade

Browse the Full Plant Guide