Oxalis, also known as yellow wood sorrel, is a delicate ground cover that gardeners love to hate, as it's a persistent weed that seems to reappear no matter what you throw at it. Its shamrock-like ...

Q: I have a centipede lawn with a healthy row of variegated liriope bordering a mulched island. I have been battling yellow wood sorrel (oxalis, I think) in my lawn. I have been spot treating with ...