Woot offers Spectracide Weed Stop For Lawns Plus Crabgrass Killer, AccuShot Sprayer, 1.33 gallon for $12.99 (orig. $21.99). Free shipping for Prime Members.

Product Description:
When you need to target weeds without harming your lawn, unleash the power of Spectracide Weed Stop for Lawns Plus Crabgrass Killer3. This hard-working formula helps you conquer unruly weeds and take command of your outdoor space. Spectracide Weed Stop for Lawns Plus Crabgrass Killer3 kills more than 470 types of weeds as listed, including crabgrass. This product kills weeds by contact – down to the root – producing visible results in 5 hours. This powerful formula kills broadleaf and grassy weeds, including dandelion, chickweed and clover, as well as crabgrass and yellow nutsedge.* When used as directed, Spectracide Weed Stop for Lawns Plus Crabgrass Killer3 kills weeds without harming your lawn. Apply when daytime temperatures are between 45° and 90° F. Lawn damage could happen above 90° F. Do not apply to Bermudagrass when daytime temperatures exceed 85°. Read the entire label before using. The AccuShot sprayer allows for continuous spraying and precise application. It features a comfortable, ergonomic grip and an extendable wand that makes it easier to target only the weeds you want to kill. In addition, it features a one-touch continuous spray that requires no repetitive squeezing, pumping or pulling. The AccuShot sprayer is reusable – keep it for use with Spectracide Weed Stop for Lawns Plus Crabgrass Killer3 AccuShot Refill. *See product label for complete list of weed types 

• KILLS WEEDS – NOT THE LAWN: When used as directed
• VISIBLE RESULTS IN 5 HOURS: Conquer unruly weeds and see visible results in as fast as 5 hours
• KILLS 470+ WEED TYPES AS LISTED: Kills broadleaf and grassy weeds including dandelion, chickweed and clover as well as crabgrass and yellow nutsedge – see product label for complete list of weed types
• KILLS THE ROOT: Kills weeds by contact down to the root
• ACCUSHOT SPRAYER: Continuous power sprayer for precise application