Cheapest weed killer per Gallons

Best deal: $10.52 per gallon (60.9% below the median) — 1 gal Ready-to-Use Grass and Weed Killer

Price range: $10.52 – $55.07 per gallon across 8 offers. Median sits at $26.92.

Top brands showing: Roundup Weed, Ortho Ground Clear, Roundup Lawns1.

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Always double-check pricing on Amazon before purchasing; unit costs can change quickly.