Black medic is an annual, biennial or short-lived perennial. A legume, it is closely related to alfalfa. It is most often found in lawns having low fertility. Often called Japanese clover, this plant has small yellow flowers and a deep taproot. It can be pulled from moist soil without difficulty.
Black Medic Flower
Keeping your lawn healthy and dense with proper watering, mowing, and fertilization will discourage invasion by black medic.
Triclopyr + 2,4-D combination herbicides or other 2,4-D combination herbicides are more effective than 2,4-D alone.
Photograph courtesy of Judy Sedbrook.
© CSU/Denver County Extension Master Gardener 2010
888 E. Iliff Avenue, Denver, CO 80210
Date last revised: 01/05/2010