Coneflowers in particular are fairly drought-tolerant plants. Black-eyed Susan vine plant is a tender perennial that is grown as an annual in temperate and cooler zones. Once established, Black-eyed Susan plants bloom better if you water occasionally during dry spells. They are planted in good soil that is well drained and they get full sun. Got one round of blossoms, but can't get it to bloom again. Other black-eyed susan … You can deadhead, or clip off old blooms, to encourage the plant to keep blooming. I divide them and give away … Propagating Black-Eyed Susan . In this guide I will show you how to germinate the seeds step by step. The more water they get, the taller they get. Generally plants should be watered only once a week (or twice, if extremely dry, and they are new transplants.) Perennial varieties will germinate best if the seed containers are kept in the refrigerator or a similarly cold place for four weeks after seeding. I live in Zone 5 where climbing Black Eyed Susan is an annual or indoor plant if taken inside in the winter. Use a water hose to thoroughly saturate the plant and soil area where your black-eyed Susan is planted. Wait for about 30 to 60 minutes before digging out the plant. I bought a seedling vine, out in a well drained pot, used excellent potting soil, and miracle grow to feed it. These simple and bright daisy-like flowers are native to the entire U.S. and parts of Canada. The problem i'm having is that during the day they tend to wilt and the leaves curl, almost as if they don't have enough water, the cone flowers are … It's growing like gangbusters, but no … Black-eyed Susans can be started indoors, from seed. Black-Eyed Susans belong to the genus Rudbeckia, which contains over 25 species of flowers.Most of these species will produce flowers with yellow petals and dark black centers (and very showy). Of course, you could use an old galvanized can and water from the rain barrel if you want to make the whole … That sounds like far too much water to me. Black eyed susans really do well (after they are established) in mediocre soil. It really takes a few days for them to perk up. Rich soil, too much moisture, and too much shade are not ideal. You can also grow the vine as a houseplant but be wary as it may grow to 8 feet (2+ m.) in length. The plants in question are black eyed susan (Rudbeckia hirta i think) and Echinacea purpurea. Some black-eyed susan varieties are perennial flowers that die back in the autumn and grow again in the spring. The black-eyed susans usually need at least an average amount of water. Plant black-eyed susans in any well drained soil in full sun (or light partial shade). Water slowly and allow it to thoroughly saturate the root system so that the plant will be hydrated and fortified for the move. 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