Giant Coneflower

Giant Coneflower Makes a Bold Native Garden Statement

Giant Coneflower is a dramatic native perennial grown for its oversized blue-green foliage and tall summer flower stalks. Also known as Rudbeckia maxima, Large Coneflower, Great Coneflower, or Giant Black Eyed Susan, this plant brings height, texture, and movement to sunny gardens where ordinary perennials may feel too small.

The plant forms a basal clump of large, paddle-shaped leaves with a powdery blue-green cast. In summer, sturdy stems rise well above the foliage and carry yellow coneflowers with drooping petals and tall dark brown cones. The combination is bold, sculptural, and easy to spot from across the yard.

Tall Yellow Flowers with Large Dark Cones

Rudbeckia maxima is not a compact black-eyed Susan. This is a statement perennial, commonly reaching 5 to 7 feet tall in bloom. The yellow ray petals hang downward from tall, narrow, dark brown cones, creating a distinctive look that feels more architectural than traditional daisy-style Rudbeckia.

The flowers bloom in summer and add vertical interest to native plantings, pollinator gardens, meadow-style borders, and the back of sunny perennial beds. After flowering, the cones remain attractive and can be left standing for birds, seed interest, and winter texture.

Blue-Green Basal Leaves Add Texture Before and After Bloom

One of the best features of Giant Coneflower is the foliage. The broad, glaucous, blue-green leaves form a handsome clump at the base of the plant before the flower stalks rise. Even before bloom, the foliage adds a bold, almost tropical texture to native gardens and sunny borders.

Use the large leaves as a contrast against fine-textured grasses, narrow-leaved perennials, and smaller flowering plants. Giant Coneflower pairs well with Switchgrass, Little Bluestem, Joe Pye Weed, Ironweed, Bee Balm, Milkweed, Goldenrod, Swamp Milkweed, and other perennials that can match its scale and naturalistic character.

A Strong Choice for Moist Soil, Rain Gardens, and Sunny Borders

Giant Coneflower grows best in full sun with average to moist, well-drained soil. It is especially useful in areas with moderately moist soil, such as rain gardens, low meadow plantings, pond edges, drainage swales, and sunny borders with consistent moisture.

Once established, Rudbeckia maxima also tolerates heat and some drought, making it more adaptable than its large size might suggest. It can handle a range of soils, but the tallest, strongest plants usually come from sites with good sun, decent moisture, and enough space for the clump to mature.

Deer Resistant, Pollinator Friendly, and Excellent for Birds

Giant Coneflower is generally considered deer resistant, which is helpful for gardeners who want height and summer color without relying on tender plants that are easily browsed. Bees, butterflies, and other beneficial insects visit the flowers during bloom.

The seed cones are valuable after the petals fade. Leave some flower stalks standing in fall and winter so birds, especially finches, can feed on the seed. Cut back old stems in late winter or early spring when you are ready to clean up the garden.

2020 AAS Herbaceous Perennial Winner