Walmart offers the Spectracide 32-oz. Weed Stop For Lawns Crabgrass Control for $5. (Lowe's has it for the same price via in-store pickup.) Opt for in-store pickup to dodge the $5.99 shipping charge. That's the lowest price we could find by $8. It purportedly kills 470+ types of weeds with visible results in eight hours.
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