That sounds like far too much water to me. Some black-eyed susan varieties are perennial flowers that die back in the autumn and grow again in the spring. Black-eyed Susans can be started indoors, from seed. Plant black-eyed susans in any well drained soil in full sun (or light partial shade). They always look horrible when they are transplanted, especially in heat. The black-eyed susans usually need at least an average amount of water. You can also grow the vine as a houseplant but be wary as it may grow to 8 feet (2+ m.) in length. Black-eyed Susan vine plant is a tender perennial that is grown as an annual in temperate and cooler zones. The more water they get, the taller they get. In this guide I will show you how to germinate the seeds step by step. The plants in question are black eyed susan (Rudbeckia hirta i think) and Echinacea purpurea. Mine thrive on neglect. Rich soil, too much moisture, and too much shade are not ideal. Black-eyed susans are part of the sunflower and aster family of flowers. Start seed about six to eight weeks before the last expected frost. Use a water hose to thoroughly saturate the plant and soil area where your black-eyed Susan is planted. Other black-eyed susan … Wait for about 30 to 60 minutes before digging out the plant. They are planted in good soil that is well drained and they get full sun. Black eyed susans really do well (after they are established) in mediocre soil. Perennial varieties will germinate best if the seed containers are kept in the refrigerator or a similarly cold place for four weeks after seeding. Generally plants should be watered only once a week (or twice, if extremely dry, and they are new transplants.) The won't get hugely tall, but they might flop over if they have too much water. Water slowly and allow it to thoroughly saturate the root system so that the plant will be hydrated and fortified for the move. It really takes a few days for them to perk up. Got one round of blossoms, but can't get it to bloom again. Black-eyed Susan vine care is most successful when you can mimic the plant’s native African climate. I bought a seedling vine, out in a well drained pot, used excellent potting soil, and miracle grow to feed it. Coneflowers in particular are fairly drought-tolerant plants. I know it's much easier to spray your entire flowerbed with a hose than it is to water each individual plant at its base, but overhead watering almost guarantees rust and mildew on black-eyed Susan. Propagating Black-Eyed Susan . These simple and bright daisy-like flowers are native to the entire U.S. and parts of Canada. I live in Zone 5 where climbing Black Eyed Susan is an annual or indoor plant if taken inside in the winter. You can deadhead, or clip off old blooms, to encourage the plant to keep blooming. 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