Mt Cuba Center
Explore the Gardens Virtual Tour Virtual Tour

Mt. Cuba is open Wednesday through Sunday, 10 am to 6 pm.

An ecological gardening certificate student completes a Native Plants of Fall exam in Mt. Cuba Center's naturalistic gardens.
Ecological Gardening Certificate Learn More Learn More
Program Guide

Classes offered year-round. Learn to garden in harmony with nature, take an art or wellness class, and more!

Wide shot of flowering Amsonia.
Latest Trial: Amsonia for the Mid-Atlantic Region Amsonia for the Mid-Atlantic Region Amsonia for the Mid-Atlantic Region
Trial Garden

Mt. Cuba Center evaluates native plants and related cultivars for horticultural and ecological value.

Mt. Cuba Center's natural lands pictured at sunset.
Protecting Natural Lands Learn More Learn More
Ecological Land Management

Mt. Cuba conserves and stewards more than 1,000 acres including meadows, forests, streams and riparian corridors.

Two guests walk down the West Slope path in spring at Mt. Cuba Center.
Gift a Membership Gift Guide Gift Guide

Enjoy unlimited general admission, member discounts, guest passes, and more!

Mt Cuba Center
Back to list

Helianthus angustifolius

Native Plants

Swamp Sunflower

3 Photos


Swamp sunflower (Helianthus angustifolius) is a tall, striking plant for the perennial border or naturalistic meadow garden, and is among the last plants to bloom in late autumn. Bright yellow, 2½” wide daisy-like flowers grow on 6’ stems clothed in rich green needle-like, leathery foliage. The clusters of flowers stand out when viewed at a distance or close up. Despite its name, swamp sunflower lives in a wide range of soil moisture conditions. This sun-loving perennial grows well among little bluestem (Schizachyrium scoparium), broomsedge bluestem (Andropogon virginicus), Georgia aster (Symphyotrichum georgianum), aromatic aster (Symphyotrichum oblongifolium), and slender goldentop (Euthamia caroliniana). Zones 5-9.

More Details

  • Plant Type
  • Sun/Shade Conditions
  • Foliage Character
  • Soil Moisture
  • Flowering Period
  • Soil PH
  • Flower Color
  • Summer Foliage Color
  • Fall Foliage Color
  • Fruit/Seed Color