The average temperature required by the giant brown-eyed Susan is 40° degrees Fahrenheit (4° C). Rudbeckia maxima is a drama queen in the garden. It is an easy-going plant that tolerates light shade, heat, some drought, nighttime visits from deer, and a wide range of soils. Pot Size. Great for cutting. Out of the clumps of bluish-green leaves, tall architectural flower stems shoot up to the sky like rockets in mid to late summer and explode into rays of golden yellow. Purple Coneflower Facts. The leaves grow more upright, which gives the plant a different look than other Rudbeckia species. They have a bluish cast to them, and become smaller as they alternate up the plant's central stems. NOTIFY ME WHEN BACK IN STOCK. This tall-growing perennial thrives well even in poor soil. In late spring through early summer, the flower stalks of Rudbeckia maxima can rise to over 7 feet tall. The plant’s dark green basal leaves are slightly hairy and are divided into three oval parts, hence the species name. Rudbeckia laciniata is affectionately known as the “Out House Plant”. Bright yellow flowers appear between August and September. This species is a native wildflower from the Southern USA. Also, make sure to plant it under full sun and keep it in moist soil. After blooms go to seed, leave the flowers stalks and goldfinches and other small birds will feed on the seeds. Relocate your plant before new stem growth in spring. Plants are available in … form a strategic partnership called N.C. Origin: Native. At the top of each stalk are large, wide, brown-green centered, yellow daisies. Rudbeckia maxima. Indian paintbrush blooms in April and is attractive to bees and hummingbirds. Powdery mildew is a fungal disease that your great coneflower plant can contract. You need to protect your Rudbeckia maxima plant from snails and slugs. The flower resembles a brown-eyed susan, but the petals of the flower hang down and the center is much taller. The seed cones often persist through winters and attract goldfinches to your garden! Large (to 5 inches.) The bright flowers with their tall cones shoot up high above the foliage in late summer. USDA Hardiness Zone: 4a - 9b : USDA Hardiness Ref. It forms attractive clumps or heads of foliage low to the ground; individual leaves are "paddle-shaped," 18" long and 3" to 4" wide. This giant coneflower will attain heights of 6-7'! The species name "amplexicaulis" means "stem-clasping," in reference to the growth of the leaves. Noteworthy CharacteristicsRudbeckias hail from the moist meadows and dappled woods of North America. Peterson. A. Grown for its large yellow coneflowers, it is equally recognisable for its large blue-green cabbage like basal leaves. Like; Save; triciae. In the summer flower stalks shoot up that are sparsely leaved, and have 2-3 daisy like blooms. So, make sure to place your plant in direct sunlight and ensure proper spacing to increase airflow. Powdery mildew can be a problem but healthy plants usually recover. Habit Clump-forming. Noteworthy CharacteristicsRudbeckias hail from the moist meadows and dappled woods of North America. Rudbeckia maxima, with its oversized, paddle-like foliage, looks like a plant that was lost in time and belongs in a world when giant creatures ruled. Rudbeckia maxima. So, make sure to plant it under full sun to see the beautiful yellow blooms of the plant. Rudbeckia maxima: Family: Asteraceae: Zone: 5-9: Height & Spread: 5-7′ tall and 3-4′ wide: Light: Full sun: Soil: Tolerant of a wide range from sandy to clay: Water: Dry to medium: Pests & Diseases: Susceptible to powdery mildew, slugs, and snails on young plants. Overwatering will still cause rot and decay, so be sure not to drown the soil – an average or medium amount of water is fine. Feed your great coneflower once every two weeks in the summer blooming season (June). However, too much shade will thwart the growth of your Rudbeckia and prevent it from flowering. N.C. These are fantastic companion plants, as the tall flower stalks and gorgeous yellow flowers combine well with other tall Rudbeckia varieties like Rudbeckia Irish Eyes and Rudbeckia laciniata. Each flower is about 3 inches with drooping rays and a 2 to 6 inch dark brown central cone. Rudbeckia laciniata, commonly called tall coneflower, is a Missouri native perennial which occurs in moist soils in rich woodlands, thickets or along streams, sloughs or other bodies of water. Hardiness. Details. There are no cultivated varieties that I know of. Rudbeckia maxima, otherwise known as the giant coneflower, is in the Asteracea family. Giant Coneflower's native range occurs in east Texas, parts of Louisiana, southern Arkansas and a few counties in southeast Oklahoma, its northern-most limit. Rudbeckia maxima. Perennial. The Cherokee, for example, used the cheerful-looking flower to ease urinary tract infections and earaches as well as for gynecological issues. Lobelia Laxiflora Care: Growing Mexican Bush Lobelia, How Far Apart To Plant Potatoes? The Plants Database includes the following 3 subspecies of Rudbeckia triloba .Click below on a thumbnail map or name for subspecies profiles. The genus name "Rudbeckia" of Rudbeckia maxima honors a family of renowned scientists and professors, the Rudbecks of Sweden, who taught Carl Linnaeus at the University of Uppsula. And YouTube flowers with their tall cones shoot up high above the foliage in spring. Maxima was discovered by English botanist and plant explorer Thomas Nuttall ( 1786-1859 in! Tall-Growing perennial thrives well even in poor soil Washington, USDA ARS National Arboretum or grass, and a. Also grow them around your House as protectors for other plants a variety of soils cone-like! 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