Rudbeckia Species, Cabbage Leaf Coneflower, Giant Brown-eyed Susan, Great Coneflower

Rudbeckia maxima

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Rudbeckia (rud-BEK-ee-a)
Species
maxima (MAKS-ih-muh)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Grown for foliage
Deciduous
Herbaceous
Height
4-6 ft. (1.2-1.8 m)
Spacing
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Hardiness
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
N/A
Bloom Color
Gold (yellow-orange)
Bright Yellow
Bloom Time
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Grow outdoors year-round in hardiness zone
Bloom Characteristics
Flowers are good for cutting
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
From seed; sow indoors before last frost
From seed; direct sow after last frost
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Birmingham, Alabama

Vincent, Alabama

Gainesville, Florida

Carrollton, Georgia

Douglasville, Georgia

Abita Springs, Louisiana

Lafayette, Louisiana

Mandeville, Louisiana

Youngsville, Louisiana

Cumberland, Maryland

Cambridge, Massachusetts

Needham, Massachusetts

Pontotoc, Mississippi

Goodman, Missouri

Kansas City, Missouri

Madison, Missouri

O Fallon, Missouri

Stratham, New Hampshire

Denville, New Jersey

Stockton, New Jersey

Fairport, New York

Fayetteville, New York

Elizabeth City, North Carolina

Kure Beach, North Carolina

Cincinnati, Ohio

Fort Jennings, Ohio

Lynchburg, Ohio

Portland, Oregon

Coopersburg, Pennsylvania

Whitehall, Pennsylvania

Charleston, South Carolina

Inman, South Carolina

North Augusta, South Carolina

Woodlawn, Tennessee

Arlington, Texas

Belton, Texas

Dallas, Texas(3 reports)

Dripping Springs, Texas

Fort Worth, Texas

Humble, Texas

Missouri City, Texas

Oakhurst, Texas

Shepherd, Texas

Arlington, Virginia

Mc Lean, Virginia

Roanoke, Virginia

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Gardener's Notes:

7
positives
4
neutrals
0
negative
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C
ROSLINDALE, MA | January 2016 | neutral

The big bold blue-green basal foliage is this plant's major appeal for me. The leaves can reach 18". Both their color and their size draw...Read More

S
S
Kansas City, MO | June 2012 | positive

While rescuing plants from the road grader on my dad's ranch in Western Kansas, I somehow ended up with a Rudbeckia Maxima that must have...Read More

C
Pontotoc, MS (Zone 7b) | March 2012 | positive

this is my favorite of all the rudbeckias ! My only complaint is how slow it grows. The first time I saw it I knew I HAD to have one....Read More

A
A
WOODLAWN, TN | June 2010 | positive

A very nice addition to my perennial border. This plant towers above all other plants in the border. It is lovely. The long stalks (over ...Read More

B
Elizabeth City, NC (Zone 8a) | May 2010 | positive

A very exciting Rudbeckia! Wide cabbage-like leaves give it great distinction and a much greater tropical effect compared to other conefl...Read More

H
Whitehall, PA | December 2009 | positive

This plant grows very tall with yellow flowers. Birds like to eat the seeds.

V
Dallas, TX | June 2008 | neutral

Pictures don't really do it justice. I just discovered this plant a month ago at the Dallas Arboretum and had to track one down. The la...Read More

R
Stockton, NJ | May 2006 | positive

This plant is a stunning success in my difficult conditions - an overgrown field I'm turning into a wet prairie. Even though the soil is ...Read More

P
Deal, NJ (Zone 7a) | September 2004 | neutral

This plant will germinate without stratification ..... seeds should be covered lightly.... light aids germination...... this is how I s...Read More

G
Fairport, NY | August 2004 | positive

This is a spectacular turkscap-like flower that blooms in August in my western New York garden. It seems not to be affected by either exc...Read More

G
G
Pineville, LA (Zone 8b) | January 2001 | neutral

R. maxima is an eye-catching perennial native to Arkansas, Louisiana and into Texas. It forms attractive clumps or heads of foliage low ...Read More

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