Using Roundup on Zoysiagrass: Why It's Risky and Off-Label

Q: Can I use Roundup on my zoysia lawn for weed control?
A: Roundup's label does not include zoysia as an approved turf. Some have used it successfully, but many have killed their lawns by spraying on zoysia that wasn't fully dormant. Warm sunny days bring zoysia out of dormancy rapidly. Unless you're willing to gamble and violate the label, don't use Roundup on zoysiagrass.