Lawn Health AI
BASF Celsius WG Herbicide product photo

Professional Post-Emergent Herbicide

BASF Celsius WG Herbicide Review

★★★★★ 4.7/5 editor rating

The professional pick. Safe on warm-season turf even in summer heat where 2,4-D products cause injury; controls 150+ weeds including doveweed.

Affiliate links — see our disclosure. Commissions never influence verdicts.

Our Verdict

Expensive upfront, cheapest per application. If you fight weeds all summer on a Southern lawn — or need to spray when it's 95°F out — Celsius pays for itself within two seasons.

✅ Pros

  • No high-temperature injury window — sprayable in summer heat
  • Controls 150+ weeds including doveweed and Virginia buttonweed
  • Tiny use rates: one bottle lasts a typical lawn for years
  • Safe on Bermuda, St. Augustine, Zoysia and Centipede

⚠️ Cons

  • High upfront cost
  • Slow visible results (7–14 days)
  • Not for cool-season lawns (fescue, bluegrass, rye)
  • Requires a quality sprayer and precise measuring
Product typeProfessional Post-Emergent Herbicide
Active ingredientIodosulfuron + Thiencarbazone + Dicamba
Price range$120–$140
Coverage1+ acre per 10 oz bottle
Best forStubborn weeds and hot-weather applications on warm-season turf

Where This Product Matters

Matched against each state's actual disease, weed and pest pressure.

Dollarweed (pennywort)DoveweedFlorida pusleyCrabgrassChamberbitter

Application window: March–May and October–November; avoid applications above 85°F

CrabgrassHenbit

Application window: April–early June and September–October; avoid herbicides above 90°F

CrabgrassHenbit

Application window: April–May and September–October; avoid spraying heat-stressed fescue in July–August

CrabgrassDoveweedVirginia buttonweed

Application window: April to early June and September–October; avoid mid-summer sprays on stressed turf

Crabgrass

Application window: May–June and September; fall applications hit dandelion taproots hardest

Crabgrass

Application window: March–May while weeds are young; avoid spraying drought-stressed turf in summer

Crabgrass

Application window: May and September — fall is the knockout window for perennial broadleaf weeds

Crabgrass

Application window: May–June and September; fall beats creeping charlie best

CrabgrassHenbit

Application window: April–May and September–October; skip sprays on drought-stressed summer fescue

Crabgrass

Application window: March–May and during monsoon flushes; Celsius-type products handle 100°F+ windows

Guides That Use This Product

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