The Q&A Archives: Flowering Groundcover for Rocky, Clay-Soil Slope

Question: At the end of our lawn there is a gentle down slope that we'd like to put a flowering ground cover on. The problem is it had many weeds (we pulled up many of them), poor clay type soil and also is rocky in spots. When it rains very heavy water runs through this ditch area, but it never retains water. Can you recommend a hearty flowering ground cover that will choke out the weeds? Thanks! B.

Answer: Kinder St. Louis, MO A.You are asking a lot from a ground cover! Rocky clay soil, weedy, subject to lots of water/erosion. If you don't mind a "wild" look, crown vetch might be a good choice. It is a perennial ground cover growing to a heightof 18" or so, commonly used as erosion control. It is hardy, and can withstand the conditions you are describing, and provides a beautiful show of small, pink and purple flowers throughout the summer. If the site is sunny, and you want a slightly more "manicured" look, you can try daylilies. If it is shady, try periwinkle.

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