purpurea in either the spring or the fall as you would any herbaceous perennial. Once a purple coneflower plant is established, it should be divided every three or four years to keep it vigorous. To restore the plants' vigor, split them, transplanting the divisions either in early spring or fall. By year four, however, they often begin to produce fewer flowers. Purple coneflower plants can bloom well for several years without division. To encourage blooming, regularly harvest E. Watering from below, regularly removing spent leaves and keeping the area free of weeds will also reduce the likelihood of a pest infestation. purpurea plants should be adequately spaced, with about 12 to 15 inches between them. To reduce the likelihood of pests (such as aphids, aster leaf hoppers, and garden fleahoppers) E. Once purple coneflower is established in a landscape, it requires minimal care-just a little snipping and weeding, and some light watering in times of drought. purpurea, the purple coneflower, is commonly called purple rudbeckia, purple echinacea, black sampson, hedge coneflower, and hedgehog coneflower (Balge). purpurea is the most commonly grown species.
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