Controlling Yellow Woodsorrel (Oxalis) in Fescue

Q: How do I kill yellow flowering woodsorrel in my fescue lawn without harming the grass?

A: Yellow woodsorrel (Oxalis stricta) is tough—it regrows from a taproot and scatters seeds. In fescue, use products with triclopyr (not for bermuda or centipede). Non-chemical: nurture dense fescue to choke it out. For other grasses, try sulfentrazone, carfentrazone, or quinclorac. Always read labels!