Zoysia Weed Control Guide
A healthy, dense zoysia lawn is its own best weed defense — the tight canopy shades out most weed seeds before they establish. Post-emergent broadleaf control: use a three-way herbicide (2,4-D + dicamba + mecoprop) when weeds are actively growing and temps are below 85°F. For grassy weeds that break through pre-emergent, quinclorac controls crabgrass and is safe on zoysia. Nutsedge requires a dedicated product like SedgeHammer or Image — pre-emergents do NOT control it. Avoid atrazine on zoysia — it is NOT labeled for all zoysia varieties. Spot-treat rather than broadcast whenever possible since zoysia's slow recovery means any herbicide damage takes weeks to fill in.
Frequently Asked Questions
Is zoysia good at choking out weeds?
Yes. A healthy, dense zoysia lawn is one of the best natural weed suppressors. Thick zoysia shades the soil surface, preventing weed seeds from germinating.
Can I use atrazine on zoysia?
Check your product label — some zoysia cultivars tolerate atrazine and some do not. When in doubt, use a targeted broadleaf herbicide like Celsius or Trimec instead.
When should I apply post-emergent herbicide to zoysia?
Apply when weeds are actively growing and temps are below 85°F. Spot-treat when possible rather than blanket-spraying. Zoysia's density will fill bare spots left by killed weeds.
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