General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Maximum recommended zone: Zone 8b
Plant Height: 4-6 feet
Plant Spread: 18-36 inches
Leaves: Semi-evergreen
Fruit: Showy
Edible to birds
Flowers: Showy
Flower Color: Yellow
Flower Time: Spring
Late spring or early summer
Summer
Late summer or early fall
Underground structures: Rhizome
Uses: Groundcover
Cut Flower
Will Naturalize
Wildlife Attractant: Birds
Butterflies
Propagation: Seeds: Stratify seeds: if starting indoors
Suitable for wintersowing
Sow in situ
Propagation: Other methods: Division
Stolons and runners
Offsets
Awards and Recognitions: Other: 2011 Oklahoma Proven! plant selection

Image
Common names
  • Large Coneflower
  • Cabbage Leaf Coneflower
  • Great Rudbeckia Dumbo's Ears
  • Giant Coneflower
  • Great Coneflower
  • Giant Brown-Eyed Susan
  • Black Eyed Susan

Photo Gallery
Location: home garden VA
Date: 06.22.2019
RUDBECKIA MAXIMA
Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-06-10
Zone 9b.
Location: Blaine TN
Date: 2019-06-12
Location: Barsons Greenhouse, Westland, Michigan
Date: 2019-08-19
Location: Valley of the Daylilies in Lebanon, OH. Home of Dan and Jackie Bachman.
Date: July 7, 2005
Location: Fairfax, VA | June, 2022
Date: 2022-06-02
Location: Barsons Greenhouse, Westland, Michigan
Date: 2019-08-19
Location: Zone 9 my front yard by mailbox
Date: 2021-05-01
Odd growth of 6 cones growing jumbled together on 1 stem
Location: Zone 9 my front yard by mailbox
Date: 2021-04-19
If you look close you can see beginning of yellow petals
Location: Valley of the Daylilies in Lebanon, OH. Home of Dan and Jackie Bachman.
Date: July 7, 2005
Location: Vermont
Date: 2015-08-01
Location: Scampston Walled Garden, Yorkshire UK
Date: 2022-06-30
Location: Barsons Greenhouse, Westland, Michigan
Date: 2019-08-19
Location: Barsons Greenhouse, Westland, Michigan
Date: 2019-08-19
Location: Blaine TN
Date: 2018-06-25
Location: Blaine TN
Date: 2018-06-25
Location: My yard in Arlington, Texas.
Date: Summer 2010
This flower has very few petals.
Location: Youngsville, LA
Date: 2017-04-27
By tabbycat
Location: 5b
Date: 2017-10-23
Location: 5b
Date: 2017-10-23

Photo courtesy of Annie's Annuals and Perennials
Location: Blaine TN
Date: 2019-06-12
Need a ladder to see it from above
Location: All pictures taken in/on my gardens/greenhouse/property
Date: 2020-03-11
Location: Mount Cuba Center, Hockessin, Delaware
Date: 2018-06-29
plant in bloom in South Garden
Location: NJ
Date: 2012-06-30
Location: My Property Sunset Zone 23 Sub-Tropical Southern California
Date: 2012-05-02
Location: 5b
Date: 2017-10-23
Location: Youngsville, LA
Date: 2017-04-27
By tabbycat
Location: My house Nacogdoches, Tx
Date: Summer

Courtesy Crownsville Nursery
  • Uploaded by vic
Location: Vermont
Date: 2012-05-19
Location: Vermont
Date: 2012-05-19
Location: Mount Cuba Center, Hockessin, Delaware
Date: 2018-06-29
foliage with one low flower
Location: Mount Cuba Center, Hockessin, Delaware
Date: 2018-06-29
full grown plant about to bloom
Location: Blaine TN
Date: 2018-04-18
Note the "protections" - don't want this weed-whacked again!
Location: Brownstown Pennsylvania
Date: 2017-06-14
Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-04-01
Cabbage Leaf Coneflower (Rudbeckia maxima) in Zone 9b. 2015-04-01

Photo Courtesy of Lazy S'S Farm Nursery.
  • Uploaded by Joy

Photo Courtesy of Lazy S'S Farm Nursery.
  • Uploaded by Joy
Location: Vermont
Date: 2016-06-28
Location: Fort Worth Botanic Gardens
Date: Summer 2010
A lovely group of plants.
Location: NJ
Date: 2012-06-30
with my lovely assistant Randy
Location: NJ
Location: Central Texas
Date: 2016-06-10
Location: My Property Sunset Zone 23 Sub-Tropical Southern California
Date: 2012-05-02
Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-11-18
Zone 9b. Dark brown seeds.
Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-11-18
Zone 9b. Interior view of the flower head in seed.
Location: Vermont
Date: 2014-05-14
This plant is tagged in:
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Comments:
  • Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Jul 2, 2018 8:57 PM concerning plant:
    This tall species is native to east Texas, southeast Oklahoma, Arkansas, northern Louisiana, and a spot in South Carolina. It rises upright to about 7 feet high with 2 inch long brown noses above the yellow petals. It has thick, waxy, blue-coloured foliage. It likes full sun and moist soil. North Creek Nursery, a wholesale native plant nursery in Landenberg in southeast Pennsylvania, sells it. I have never seen this species until I saw it in northern Delaware. It spreads slowly by rhizomes. It is good to deadhead the flowers for longer summer bloom. If some stems fall down, it may need some staking. It is propagated by seed or root cuttings or division. It grows in USDA Zones 5 to 8.
  • Posted by tabbycat (Youngsville, LA - Zone 9b) on Jun 20, 2018 7:55 PM concerning plant:
    It's time to cut the dried cones after they flowered all of April and May. Cutting these 1st seed heads encourages the plants to make a 2nd flush of flowers in late summer/fall. I also will be planting some of these seeds for late summer/fall sprouts of new plants for some friends and family to have flowers next spring.
Plant Events from our members
tabbycat On May 1, 2022 Bloomed
More stems each year & about 8 with flowers
tabbycat On June 28, 2021 Harvested
Cut about 12 well dried seed heads
tabbycat On May 1, 2021 Bloomed
got taller than mail box & about 7 stems. 1 flower was multi 6 cone thing I got pics. Bloomed into June
tabbycat On March 20, 2020 Bloomed
1st flower on 3' plant by mailbox
tabbycat On May 7, 2019 Bloomed
1st flower of 2019 is on 4' stem.
tabbycat On March 1, 2019 Plant emerged
Mild Winter so Springs new leaves have arrived.
MrsBinWY On May 19, 2019 Transplanted
On 5-19-2019, planted 5 in the front rain garden. (Other 4 went to Wanda Manley.) One of mine bloomed in 2021.
MrsBinWY On April 13, 2019 Potted up
9
MrsBinWY On January 28, 2019 Seeds germinated
4
MrsBinWY On January 20, 2019 Seeds sown
~9 viable-looking seeds from Samlav's 2017G. Per TC: 68 degrees. If no germination in 3-4 weeks, move to 24-39 degrees for 2-4 weeks.
MrsBinWY On February 8, 2017 Seeds sown
milk jug, room temp, seeds & chaff from tabbycat; gave up on these 5-26-17
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