There are more than two dozen wild species of Black-eyed Susans, native to different parts of North America, all with distinctive yellow petals radiating out from a central knob. Susans do come easily from seed and are readily available at most garden centers for spring planting, but if you have your own crop, transplant in October, before the first frost (Here in … I agree with Angela. Slugs can destroy the seedlings. Once established, black-eyed Susans require little care and rarely suffer from pest problems. The Black Eyed Susans were the first to become domesticated garden flowers. Ideally transplant your black-eyed Susans in the fall so that their roots can establish before the winter weather arrives. Pack the soil gently around the base of the stem. Black eyed Susan plants are short-lived perennials that generally do not live for more than two years. Store them inside the refrigerator in a plastic bag filled with lightly moistened sphagnum moss. Because black-eyed Susans are so hardy, however, you can transplant them anytime. Most of the time, attempts to divide and transplant black-eyed Susan vines will simply result in the death of the vine or unattractive and unhealthy appearance if the vine does happen to survive. And while some species of Black-eyed Susans have additional names—such as daisies, sunflowers or coneflowers—they all belong to the Rudbeckia genus. 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 Susans are prolific bloomers from midsummer to autumn and will bloom even more if … Other black-eyed susan … Prepare black-eyed Susan seeds for indoor sowing five months before the last spring frost. I have some in a planter on my patio, but it has multiplied and become too crowded for the pot; it needs water daily. Set the black-eyed Susans outside in a protected area, such as a covered patio, one week prior to planting them in the garden. Black-eyed Susan plants grow to a 12 inch spread, so leave about 12 inches between plants. How to Grow Black Eyed Susan Flowers. This will also give them an earlier start in spring. The best time to transplant black-eyed Susans is in the fall when the plant is dormant. The black eyed Susan flower attracts butterflies, bees and other pollinators to the garden. Black-eyed Susans generally grow between 1 and 3 feet tall (though they can grow taller) and can spread between 12 to 18 inches, so plant seeds closer to prevent lots of … Black-eyed susans are part of the sunflower and aster family of flowers. It is easiest to transplant black-eyed Susans after all of the flowers and blooms die away for the season since you won't have to worry as much about damaging them and maneuvering around them. Black eyed susans are so easy to grow and light up the garden with bright yellow flowers that fairly glow when many other flowers are fading away.