wide known as black - eyed Susan , this North American indigene can be found develop as a wildflower in fields and along roadsides throughout the land . These reliable works shine in the garden with an copiousness of brilliantly one-sided flowers reflecting the splendid yellows and Orange of the summer sun . Rudbeckias are gentle to get , adjust to a across-the-board range of garden conditions , have few insect or disease problem , and demand only minimal care for a striking show of pollyannaish colouration during the summertime and fall .
Classification and varietiesThere are 25 species of Rudbeckia that are native to North America and are broadly find growing in the East and Midwest , though they have now naturalized throughout most of the United States and can be seen in field and garden from Canada to Mexico .
A member of the Aster mob , the rudbeckia ’s daisy - like peak do in individual , semi - double , and fully double forms in a range of colours from maize - yellow to gold , chestnut , mahogany , and bronze , as well as multi - one-sided blooms . Most species are in bloom from midsummer through fall . Plants have coarse - textured , hirsute unripened leaves .
Native to the eastern and midwestern prairie , the brownish - eyed Susan ( Rudbeckia triloba ) is covered with a surplus of dainty , 1- to 2 - inch yellow-bellied flowers with push - like dark centers that evanesce to embrown . This biyearly or unawares - lived perennial is hardy in zone 4 - 7 but can also be spring up as an yearly . plant are 2- to 5 - feet magniloquent depending on the growing shape .
Rudbeckia laciniata is a perennial type commonly call in cutleaf coneflower or ragged coneflower . Its most notable representative is the old - fashioned heirloom ‘ Golden Glow . ’ plenitude of way is need to farm this plant life as it can circulate 6 feet across . Rudbeckia American Gold RushPetals of Rudbeckia fulgida ( orange coneflower ) are not true orange but a warm yellowness . A popular choice has been Rudbeckia fulgida var . sullivantii Goldsturm until the new AAS Winner American Gold Rush came on the scene . It was trialed against Goldsturm and was regain to be superior in drug abuse , plant health , flower power , and bloom time . undimmed gold - yellow flower are on upright domed - shaped plants that uprise to a stocky 24 ” tall . This newest AAS Winner was especially praised for its power to stand Septoria leaf spot .
amber rush
The largest mathematical group of rudbeckias for the garden is Rudbeckia hirta . bloom blossom from July until hoarfrost in shades of orange , orange - yellow , and yellow . Rudbeckia hirta is a suddenly - lived perennial and is grown as an annual in Northern surface area . industrial plant are biennial or perennial in Southern regions .
Indian summerIndian Summer is an All - America Selections ( AAS ) winner from 1995 . It bring forth stunning 5- to 9 - inch flowers on flora that reach about 3 - feet tall . The golden - yellow flower are idealistic for cutting . Another AAS victor is Cherokee Sunset . The semi - double and three-fold , 2- to 4 - column inch , bloom bloom in shades of sensationalistic , orange , bronze , and mahogany . Plants pass on about 30 - inches magniloquent .
A newer Rudbeckia hirta is Rudbeckia Amarillo Gold , a 2020 AAS Winner . It boasts of 4 - 6 ” blooms on compendious and undifferentiated 12 - 18 ” plant life that are gross for landscape , bedding , and container .
Amarillo goldLooking for something dissimilar ? The 2003 AAS winner Prairie Sun produces spectacular 5 - in blooms with lucky - yellow petals tipped with a brush of faint primrose yellowness surrounding a striking , idle - greenish center cone . The 3 - foot tall branching industrial plant can be grown in garden and large container . Or the honest-to-god , 1961 AAS Winner Gloriosa Double sports ample , fortunate dual flowers that are 3 ½ ” across with large fateful centers . This dish also grow to 3 ’ marvellous .
Garden UsesRudbeckias are versatile plants that bestow bright sunny color to perennial beds , mixed borders and containers . They can be used alone in aggregative plantings , as a border , or along a fencing . idealistic for attracting wildlife , bees and butterflies are draw to their colored prime while the ripe coneheads supply seed during the spill and winter to feed thirsty bird , especially finches and chickadees .
