Scotts GrubEx1 Season-Long Grub Killer 28.7 lb — 1-Application Granular, Protects Lawns up to 4 Months

Scotts GrubEx1 Season Long Grub Killer is a single-application granular insecticide that protects lawns by killing and preventing grubs for up to four months.

If grubs are turning your turf brown or lifting sod, this ready-to-use granular treatment helps stop root-feeding larvae before they destroy more grass. Designed for spring or early-summer use on dry lawns, GrubEx1 targets grubs plus several other listed pests. It's formulated for homeowners and applied with a broadcast or drop spreader, then activated with thorough watering.

How quickly will I see results after applying GrubEx1?

GrubEx1 works as a preventative and early-treatment product: it acts while grubs are young and feeding, reducing damage over the growing season. Visible turf recovery may take a few weeks as roots recover and lawn growth resumes.

• Begin application in spring or early summer on a dry lawn.
• Water in thoroughly after spreading to activate the granules.
• Expect reduced grub activity within weeks and protection that can last up to four months.

Which pests does this granular insecticide control?

Beyond white grubs, GrubEx1 lists several secondary targets that contribute to lawn damage. It directly combats caterpillars like armyworms, May/June beetles, and suppresses chinchbugs; when used annually, it can help manage Japanese beetle pressure as well.

• Primary: white grubs (root-feeding larvae).
• Also listed: armyworms, May/June beetles, and other specified lawn pests.
• Suppresses chinchbugs and supports Japanese beetle control with yearly application.

How do I apply GrubEx1 for best coverage and safety?

Use a calibrated spreader for even distribution and follow the package spreader settings to cover up to 10,000 sq. ft. One 28.7 lb bag treats that area with a single yearly application; do not exceed the maximum of one application per year.

• Recommended spreaders: Scotts broadcast/rotary (setting 3 ½), drop spreader (setting 5 ½), or Scotts Wizz (setting 3 ¾).
• Apply to a dry lawn, then water after spreading to activate the product.
• People and pets may re-enter once the lawn surface is dry.

Will this interfere with my regular lawn care schedule?

GrubEx1 integrates into routine spring or early-summer maintenance with minimal disruption. Apply as part of your seasonal treatment plan, then proceed with mowing and fertilizing as usual after the lawn dries.

• One annual application simplifies planning and avoids frequent re-treatments.
• Apply before heavy grub damage appears to protect root systems.
• Compatible with standard watering and mowing once the lawn is dry.

Who is this for: Scotts GrubEx1 Season Long Grub Killer is intended for homeowners and property caretakers seeking a straightforward, single-application solution for grub prevention across larger lawns (up to 10,000 sq. ft.). It suits DIY gardeners who use a Scotts spreader for precise application and want season-long grub protection without multiple treatments. If you manage turf that’s vulnerable to root-feeding larvae or the listed secondary pests and prefer a granular product applied in spring or early summer, GrubEx1 is formulated for those needs.