What Are Creeping Lawn Weeds
Creeping weeds spread horizontally rather than growing upright. They send out runners, stolons, or trailing stems that root at every node, creating a dense mat that chokes out grass. A single creeping weed plant can cover several square feet in one growing season.
These weeds thrive in thin, weak turf where they face little competition. Lawns with bare patches, compacted soil, poor drainage, or excessive shade create ideal conditions for creeping weeds to establish and spread.
Common Creeping Weed Identification
| Weed | Leaf Shape | Flowers | Spreads By | Season |
|---|---|---|---|---|
| Creeping Charlie (Ground Ivy) | Round, scalloped edges, coin sized | Small purple flowers in spring | Stolons that root at nodes | Spring through fall |
| White Clover | Three round leaflets (occasionally four) | White globe shaped flower heads | Stolons and seed | Spring through fall |
| Creeping Spurge | Small oval, opposite pairs along stem | Tiny, inconspicuous | Trailing stems, prolific seed | Summer |
| Creeping Woodsorrel | Three heart shaped leaflets (like clover but pointed) | Small yellow flowers | Runners and explosive seed pods | Spring through fall |
| Dichondra | Small, kidney shaped | Tiny white flowers | Creeping stems, seed | Year round in mild climates |
| Creeping Bentgrass | Fine grass blades, lighter green than lawn | Seed head in late spring | Aggressive stolons | Cool season |
How to Tell Creeping Weeds Apart
Start with the leaf shape. Round, scalloped leaves with a minty smell when crushed indicate creeping charlie. Three round leaflets point to white clover. Three heart shaped leaflets with a crease down the center mean creeping woodsorrel (often confused with clover but the leaf shape is distinctly different).
If the creeping plant looks like grass but forms dense, light green patches that feel puffy underfoot, you likely have creeping bentgrass. It stands out from the surrounding lawn because it grows horizontally in thick mats rather than upright like your lawn grass.
Why Creeping Weeds Take Over
Thin turf is the number one cause. Every bare spot in your lawn is an invitation. Creeping weeds exploit gaps that upright weeds cannot because their horizontal growth lets them colonize ground level space without competing for vertical light.
Compacted soil favors creeping weeds because grass roots cannot penetrate deep enough to compete. Core aeration in fall opens the soil for grass roots while making conditions less favorable for shallow rooted creeping weeds.
Excessive shade weakens grass but many creeping weeds (especially creeping charlie and clover) tolerate shade well. If you have a shady lawn being overtaken by creeping weeds, the solution is usually a shade tolerant grass variety (fine fescue) rather than herbicide alone.
How to Control Creeping Weeds
Broadleaf creeping weeds (creeping charlie, clover, spurge, woodsorrel) respond to triclopyr or combination products containing 2,4-D, dicamba, and mecoprop. Apply in fall when weeds are actively growing and transporting nutrients to roots. Fall applications are 30 to 50 percent more effective than spring applications because the herbicide follows the nutrient flow downward into root systems.
Creeping grassy weeds (creeping bentgrass) cannot be selectively removed from a lawn with herbicides. The only options are spot treatment with glyphosate (which kills all grass in the treated area) followed by reseeding, or learning to live with it.
Cultural control is the long term solution. A thick, healthy lawn at the correct mowing height (3.5 to 4 inches for fescue) physically blocks creeping weeds from establishing. Overseed thin areas in September, core aerate annually, and fertilize on schedule to keep grass dense enough to outcompete invaders.
