Yellow Woodsorrel University Links Control Options Germination Dates Photograph from Weeds of Southern Turgrasses , Cooperative Extension Service, University of Georgia College of Agricultural and Environmental Sciences, Athens. Cinquefoil is a summer perennial with leaves containing 5 leaflets which are palmately divided on hairy petioles. The leaves have toothed edges and arise from fibrous creeping stems. The root is a fibrous lateral root. The flowers of cinquefoil are sulphur yellow, consisting of 5 petals appearing brighter at the base.
Cinquefoil spreads by seed.
Cinquefoil is found in the upper two thirds of the United States and in Canada. Gravelly soil with a pH below 6.0 is attractive to cinquefoil. Good fertility and a pH above 6.0 will help prevent infestation from this weed. Follow good turf management practices to create a dense competitive stand of turfgrass. Lime to a pH of around 6.7.