Spurge

About Spurge

Spotted spurge (Euphorbia maculata) is a summer annual broadleaf weed that really gets going in Middle Tennessee toward the end of summer — late August into September. It grows low to the ground and forms dense mats on the soil surface, thriving in hot, dry, compacted soil. You will find it concentrated along hardscapes: sidewalks, walkways, pool decks, concrete patios, and driveways. If you have newer construction with compacted soil and areas of hydrophobic soil, you will see more spurge than established neighborhoods. The reason spurge loves hardscape edges ties into soil biology. When soil dries out — especially gravelly, construction-debris-laden soil near concrete and asphalt — the microbial community in the soil dies back. Those dying microbes leave behind an oily residue that creates a hydrophobic film on the soil surface. The first twenty to thirty minutes of rainfall or irrigation literally wash off like water off a duck, running downhill to the nearest drain. This means the soil stays drier than it should be even after rain, turfgrass struggles, and summer annuals like spurge fill the gap where competition is weakest. The main problem with spurge from a lawn care standpoint is the seeding conflict. Because spurge forms such a dense mat, it can choke out any seedlings you plant in September as you move into your fall overseeding window. Worse, most of the chemistry used to control spurge also inhibits seed germination for four to six weeks. If you try to treat spurge in late August, you have effectively killed your fall seeding window through late September. Early control is the key. Pre-emergent herbicide applied in February and March prevents spurge germination entirely — think of pre-emergent like wax on your car, a thin protective film on the soil surface that causes germinating radicles to curl in on themselves until the seed exhausts its resources. On a well-maintained treatment plan, spurge is a non-issue. For spot treatments on new sign-ups or breakthrough plants, seed-safe chemistries are available but more expensive, so they are used on a targeted spot-spray basis rather than broadcast.

Spurge (Euphorbia maculata) is a turf weed commonly found in lawns throughout Middle Tennessee, including Columbia, Thompson's Station, Spring Hill, and the surrounding areas. This entry is part of our Weed Identification Guide.

As lawn care and treatment specialists, we identify and treat Spurge regularly when servicing properties across the region. Proper identification is the first step toward selecting the right herbicide and timing for effective control.