How do you get rid of Rudbeckia?

Overwatering or xeriscaping and shading are ways to get rid of Rudbeckia. The genus member of the plants commonly called coneflowers and sunflowers needs medium-heavy, rich, well-drained soils in full sun. Manual or mechanical removal followed by solarizing the soil with weighted-down black plastic sheeting will keep these beautiful, beneficial wildflowers from returning.