Spots on Leaves of Black Eyed Susan. Rudbeckia hirta, commonly called black-eyed Susan, is a North American flowering plant in the sunflower family, native to Eastern and Central North America and naturalized in the Western part of the continent as well as in China. It’s also a medicinal herb believed to treat colds, flu and even snakebites. Basal leaves densely hairy, up to 5-inches long and 1-inch wide, with leaf base narrowly tapering along the leaf stalk. in height. It also has the well-known scratchy, hairy leaves… Leaves are generally a deep green color that blend well in a mixed garden bed. Blooms. This short-lived perennial has a single flower head at the top of each stem branch. Last summer the leaves of my black-eyed Susans developed spots and the whole plant eventually dried up. You can tell them apart from coneflowers by their coarse-textured, hairy leaves. The most commonly thought of Rudbeckia is the traditional black-eyed Susan, a daisy-like flower with gold petals and a dark center seed head. Black Eyed Susan Spots. This will energize the plant. Interestingly, Echinacea was once classified in the genus Rudbeckia. Goldsturm black-eyed Susan (Rudbeckia fulgida sullivantii ‘Goldsturm’), which you may also know as Goldsturm coneflower or just yellow coneflower, is one of the most popular perennials in modern gardens. Learn how to plant, grow, and care for Black-eyed Susans with this garden guide from The Old Farmer's Almanac. Powdery Mildew Erysiphe cichoracearum. The disk of each flower is domed, like that of a coneflower. in height. The leaves are pale green, simple, alternate and lance-shaped. Diseases caused by Fungi: Downy mildew, Plasmopora sp. It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States. Before you can get rid of the disease plaguing your black-eyed Susans, you must first identify the problem. Lady Bird Johnson Wildflower Center focused on protecting and preserving North America's native plants through native plant lists and image galleries, conservation, education, natural landscapes, seed collection - Millennium Seed Bank (MSB) Project, preserving and restoring native communities, spreading awareness on invasive species and gardening to attract wildlife. Sunflower : Black Eyed Susan. The Black-Eyed Susan is known to be pioneer plants since they’re the first to grow after instances of fire or natural calamities. Read our Growing Guide for Black-Eyed Susans. The leaves are long, lanceolate, and rough to the touch. Black Eyed Susan (Rudbekia) > Spots on leaves. It’s also a medicinal herb believed to treat colds, flu and even snakebites. Solving Problems of Black Eyed Susan Black-eyed Susan is a pretty tough plant and doesn't suffer many problems. June to October. With its masses of yellow daisies, each with a black central cone, it brightens up our plantations from late July to late September, attracts bees, birds… Black Eyed Susan also makes an excellent backdrop floral choice. The stalk is robust and also coarsely textured. Learn all about choosing and planting Black Eyed Susan flowers. June to October. Basal leaves densely hairy, up to 5-inches long and 1-inch wide, with leaf base narrowly tapering along the leaf stalk. Black-eyed Susan can be found growing in almost any sunny location - dry fields, roadsides, or along lake shores, in patches or scattered amongst other vegetation. As indicated by its name, the flower head has a prominent black or dark-brown central cone that is surrounded by rich, yellow, petal-like rays. Blooms. The foliage of black-eyed Susan is unobtrusive. The leaves are yellowing at the bottom of the plant. Several leaf spots diseases can cause the symptoms you described. Black-Eyed Susan Rudbeckia hirta Aster family (Asteraceae) Description: This is a biennial or short-lived perennial plant that is about 1-2½' tall. Description. The Black-Eyed Susan belongs to the sunflower family and is the state flower of Maryland. Black-eyed Susan vine plant is a tender perennial that is grown as an annual in temperate and cooler zones. Black-eyed susan is a relatively large wildflower, ranging from 30-90 cm. Kissing cousin to the black-eyed Susan, the coneflower produces big pink, purple, or white daisylike blooms on robust stems with a prickly, green to orange center. Black-eyed Susan (Rudbeckia hirta) Distinguishing Characteristics. Skip to main content ... You can cut back Black Eye Susan 2 inches from the soil. It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States. Black-eyed Susan (Rudbeckia hirta) Distinguishing Characteristics. Nothing is as breathtaking as a field full of these bright flowers, and nothing as devastating as discovering spots on black eyed Susan. It starts out as small, white, round, powdery spots on the top sides of older leaves, but quickly covers whole leaves (top and bottom) and stems.