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Marcus, Joseph A.
Rudbeckia maxima Nutt.
Giant coneflower, Great coneflower, Giant Brown-eyed Susan
USDA Symbol: ruma3
USDA Native Status: Native to U.S.
Giant brown-eyed Susan has clumps of silvery-blue foliage that give rise to stately flower stalks. The flowers have intense yellow ray flowers that dangle from tall brown centers. It should be cut back to the base after blooming to keep tidy and be planted in mass for best effect in landscapes.
Plant CharacteristicsDuration: Perennial Habit: Herb Size Notes:
3-6 feet Leaf:
Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: Jul , Aug , Sep
AR , LA , OK , SC , TX Native Distribution: L48(N) Native Habitat:
Found in moist open places. Forming beds in low ground, sandy or silty soils; east Texas west to East Cross Timbers. Seems pretty drought resistance despite its swampy origins. USDA Native Status: L48(N)
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade
Soil Moisture: Moist
CaCO3 Tolerance: Low
Drought Tolerance: Low
Conditions Comments: The flowers have intense yellow petals that dangle from tall brown centers. Clumps of silvery-blue foliage give rise to stately flower stalks.
BenefitUse Ornamental: Makes a good cut flower.
Conspicuous Flowers: yes
Interesting Foliage: yes
Find Seed or Plants
Order seed of this species from Native American Seed and help support the Wildflower Center.
Wildflower Center Seed BankLBJWC-1066
Collected 2011-07-23 in Harrison County by Lady Bird Johnson Wildflower Center
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Record Modified: 2010-02-22
Research By: TWC Staff