Large Coneflower (Rudbeckia maxima) in the Black Eyed Susans Database

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

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: My garden, Baltimore MD
Date: 2023-07-01

Uploaded by Jillz

Location: home garden VA
Date: 06.22.2019
RUDBECKIA MAXIMA

Uploaded by floota

Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-06-10
Zone 9b.

Uploaded by HamiltonSquare

Uploaded by pdermer1x

Location: Barsons Greenhouse, Westland, Michigan
Date: 2019-08-19

Uploaded by DaylilySLP

Location: Valley of the Daylilies in Lebanon, OH. Home of Dan and Jackie Bachman.
Date: July 7, 2005

Uploaded by Marilyn

Location: Fairfax, VA | June, 2022
Date: 2022-06-02

Uploaded by sedumzz

Uploaded by DaylilySLP

Location: Zone 9 my front yard by mailbox
Date: 2021-05-01
Odd growth of 6 cones growing jumbled together on 1 stem

Uploaded by tabbycat

Location: Zone 9 my front yard by mailbox
Date: 2021-04-19
If you look close you can see beginning of yellow petals

Uploaded by tabbycat

Location: Aberdeen, NC (my garden 2023)
Date: June 13, 2023
Large Coneflower # 238 nn; RAB p. 1109; AG p. 276, 55-49-?; LHB p

Uploaded by WebTucker

Location: Aberdeen, NC (my garden 2022)
Large Coneflower # 238 nn; RAB p. 1109; AG p. 276, 55-49-?; LHB p

Uploaded by WebTucker

Uploaded by Marilyn

Uploaded by Char

Location: Scampston Walled Garden, Yorkshire UK
Date: 2022-06-30

Uploaded by kniphofia

Uploaded by DaylilySLP

Uploaded by DaylilySLP

Uploaded by pdermer1x

Uploaded by pdermer1x

Location: My yard in Arlington, Texas.
Date: Summer 2010
This flower has very few petals.

Uploaded by frostweed

Location: Youngsville, LA
Date: 2017-04-27
By tabbycat

Uploaded by tabbycat

Uploaded by Samlav

Uploaded by Samlav

Uploaded by tabbycat

Photo courtesy of Annie's Annuals and Perennials

Uploaded by Calif_Sue

Location: Blaine TN
Date: 2019-06-12
Need a ladder to see it from above

Uploaded by pdermer1x

Location: All pictures taken in/on my gardens/greenhouse/property
Date: 2020-03-11

Uploaded by janinilulu

Location: Mount Cuba Center, Hockessin, Delaware
Date: 2018-06-29
plant in bloom in South Garden

Uploaded by ILPARW

Uploaded by Onewish1

Location: My Property Sunset Zone 23 Sub-Tropical Southern California
Date: 2012-05-02

Uploaded by wcgypsy

Uploaded by Samlav

Location: My house Nacogdoches, Tx
Date: Summer

Uploaded by Watersprite

Uploaded by vic

Uploaded by Char

Uploaded by Char

Location: Mount Cuba Center, Hockessin, Delaware
Date: 2018-06-29
foliage with one low flower

Uploaded by ILPARW

Location: Mount Cuba Center, Hockessin, Delaware
Date: 2018-06-29
full grown plant about to bloom

Uploaded by ILPARW

Location: Blaine TN
Date: 2018-04-18
Note the "protections" - don't want this weed-whacked again!

Uploaded by pdermer1x

Location: Brownstown Pennsylvania
Date: 2017-06-14

Uploaded by nativeplantlover

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

Uploaded by HamiltonSquare

Photo Courtesy of Lazy S'S Farm Nursery.

Uploaded by Joy

Uploaded by Joy

Uploaded by Char

Location: Fort Worth Botanic Gardens
Date: Summer 2010
A lovely group of plants.

Uploaded by frostweed

Location: NJ
Date: 2012-06-30
with my lovely assistant Randy

Uploaded by Onewish1

Uploaded by Onewish1

Location: Central Texas
Date: 2016-06-10

Uploaded by Esperanza

Uploaded by wcgypsy

Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-11-18
Zone 9b. Dark brown seeds.

Uploaded by HamiltonSquare

Location: Hamilton Square Perennial Garden, Historic City Cemetery, Sacramento CA.
Date: 2015-11-18
Zone 9b. Interior view of the flower head in seed.

Uploaded by HamiltonSquare

Uploaded by Char

This plant is tagged in:

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.

Reply to this comment
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.

Reply to this comment

Plant Events from our members
tabbycat	On April 15, 2024	Bloomed As tall as mail box & now about 3 or 4 roots as it clumps.
tabbycat	On March 15, 2024	Miscellaneous Event leaves stay green all winter then by Mid March start sending up a flower stem that will have flowers in April.
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
WebTucker	On June 13, 2023	Bloomed

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Black Eyed Susans Large Coneflower (Rudbeckia maxima)

Black Eyed Susans

Large Coneflower (Rudbeckia maxima)