Spotted Spurge: identify it, treat it, keep it out
Sarah MitchellLawn Diagnostics Specialist | 12 YearsSpotted spurge is a heat-loving summer annual that forms flat, dense mats from a single taproot, often in thin lawn edges, sidewalk cracks, and droughty spots. It goes from seed to producing new seed in under five weeks, so a small June patch becomes a colony by August.
Top pick for spotted spurge
- 1Check price
Top pickSpeedZone EW Lawn Weed Killer
Fast-acting lawn weed killer for cool-season lawns that targets dandelion, clover, spurge, plantain, and other listed weeds. Spurge is easiest to control while young and actively growing.
As an Amazon Associate we earn from qualifying purchases.
The five-week sprint
Spotted spurge compresses an entire generation into about a month. Seed germinates in hot soil, the mat spreads flat from one central taproot, and new seed is dropping within five weeks, all summer long, wave after wave. That speed is why a spurge problem seems to appear from nowhere in August: the June plants you did not notice have already grandparented the ones you are looking at.
It is heat-seeking by design. Germination wants soil temperatures that lawn interiors rarely reach, but pavement edges hit easily, which is why spurge lines driveways, sidewalks, and curb strips. The red-spotted leaves and the milky sap when a stem snaps make identification certain (the sap also irritates skin, so wear gloves before pulling).
Density plus edge care
Spring pre-emergent at the crabgrass window suppresses the first flush, but spurge keeps germinating all summer, so the chemical barrier alone never quite finishes the job. Your real defense is shade at soil level: raise the mowing height, thicken thin areas, and spurge seed simply cannot get the hot bare soil it requires.
Give the pavement edges special attention because they are the incubator. Water and feed those strips a little better than the rest of the lawn, hand-pull any mats you see while they are small (the single taproot makes this easy and satisfying), and reseed thin edges in fall. Kill the edge habitat and interior spurge mostly stops appearing on its own.
How to identify spotted spurge
- Flat, pancake-like mats that radiate from a central taproot
- Tiny oval leaves, each usually with a maroon-red spot in the center
- Stems bleed milky white sap when snapped (wear gloves, it irritates skin)
- Reddish, often hairy stems hugging the soil surface
Not sure this is spotted spurge? Snap a photo and our AI will identify the weed with treatments matched to your grass type.
When to treat spotted spurge
Prevention (pre-emergent)
Apply before germination, when soil reaches about 60°F.
Window: Late spring
Typical dates: Before soil reaches 60°F consistently
Treatment (post-emergent)
Best time: Early summer when plants are small
Target stage: Young plants before they spread laterally
Conditions: Apply when weeds are dry · No rain for 24 hours · Temps below 90°F
Germination starts around 60°F soil temperature (optimal 75°F). Track your ZIP's live soil temperature or get an exact plan from the herbicide timing calculator.
How to control spotted spurge
- 1Crabgrass pre-emergent also prevents spurge. The timing overlaps at 55-60°F soil temperature.
- 2Apply post-emergent 2,4-D plus dicamba, or carfentrazone (Quicksilver), to young plants
- 3Hand-pull small infestations before seed set and wear gloves, because the sap can irritate skin
- 4Aerate compacted areas and overseed to improve turf density where spurge colonizes
Good to know
- • Low-growing summer annual that forms flat mats close to the ground
- • Exudes milky white sap when stems are broken, which separates it from similar mat-forming plants
- • Thrives in hot, dry conditions and compacted soil, so it shows up along driveways and thin turf edges
- • Each plant can produce thousands of seeds, creating heavier infestations year after year
Weed control quotes
Get matched with local weed control pros on Angi. Free quotes, no obligation.
Angi is a partner; we may earn a commission if you request quotes there.
Products that work on spotted spurge
These picks are not filtered to your lawn. Some herbicides damage certain grasses (atrazine is for warm-season lawns; Trimec harms St. Augustine). Verify your grass type on the product label before applying, or use the herbicide timing calculator for grass-filtered recommendations.
Recommended Products
- 1Check price
Top pickFiskars Stand-Up Weed Puller Tool (39 in)
Four-claw stand-up puller for removing isolated taproot and rosette weeds without a selective herbicide. Wear gloves and pull the shallow-rooted mat before it sets seed.
- 2Check price
Best valueBarricade 4FL Herbicide Concentrate (4 Fl Oz)
Prodiamine pre-emergent concentrate for established lawns when the guide specifically calls for long-residual crabgrass prevention. The 4 oz bottle treats roughly half an acre at the standard label rate. Prevention matters because spurge spreads low and fast from seed.
As an Amazon Associate we earn from qualifying purchases.
Where spotted spurge shows up
Most common in these regions:
Sources
- NC State TurfFilesWeeds in turf identification library
- Penn State ExtensionWeed management in turf
Frequently asked questions
Is spotted spurge dangerous to touch?
The milky sap can irritate skin and eyes, and it is mildly toxic to pets if grazed in quantity. Wear gloves when hand-pulling. Pulling works well since the plant grows from a single taproot.
How do I stop spurge from coming back all summer?
Spring pre-emergent at the crabgrass window suppresses the first flush, but spurge germinates all summer in hot soil, so density is your real defense: raise mowing height and thicken thin edges so sunlight never reaches bare soil.
Why is spurge always along my driveway?
Reflected heat. Pavement edges hit the high soil temperatures spurge seeds prefer, and lawns are usually thinnest there. Water and feed those edges a little better and the strip stops being an incubator.
Related weeds
Dandelions
Dandelions are broadleaf perennials with a taproot that can reach ten inches deep, which is why mowing the flowers off never kills the plant. Fall is the best kill window, when the plant pulls herbicide down into the root along with winter reserves.
White Clover
White clover is a low, creeping perennial legume with the classic three-leaflet shape and white pom-pom flowers. It thrives exactly where grass struggles, in low-nitrogen soil, because it fixes its own nitrogen. Heavy clover is usually a message that the lawn is underfed.
Broadleaf Plantain
Broadleaf plantain is a perennial rosette weed with wide, ribbed, oval leaves that hug the ground below mower height. Like goosegrass, it flags compacted soil. It regrows from a fibrous root crown each year and sends up distinctive rat-tail seed stalks all summer.
Not sure what's in your lawn?
Upload a photo and our AI identifies the weed, disease, or pest with severity and treatments matched to your grass and ZIP.
Identify this weed freeCover photo: A spotted spurge mat spreading over pavement by zebedeugalinha, CC BY 4.0, via iNaturalist.
