Product Overview

The Scotts GrubEx1 Season Long Grub Killer (99605) is a granular lawn treatment designed to kill and prevent grubs and other root-damaging insects before they destroy your turf. This 14.35 lb. bag treats up to 5,000 square feet, making it an efficient choice for homeowners looking for preventive lawn care in a single application.

GrubEx1 targets common root-feeding larvae like Japanese beetles, June beetles, and chafers, stopping them before they hatch and begin feeding. Apply it in spring or early summer for up to 4 months of protection, ensuring your lawn stays green and healthy through the peak pest season.

Unlike contact insecticides, this product works beneath the surface where grubs live—defending your lawn from the inside out. It’s safe for use on all grass types when applied as directed and watered in after spreading.

Technical Specs

• Brand: Scotts
• Model Number: 99605
• Product Type: Granular grub control
• Coverage: Up to 5,000 sq. ft. (14.35 lb. bag)
• Application Timing: Spring to early summer
• Control Duration: Up to 4 months
• Pests Controlled: White grubs, Japanese beetle larvae, June beetles, chafers
• Application Method: Broadcast spreader; water in after use
• Grass Compatibility: Safe for all turfgrass types when used as directed

What It’s Good For

Ideal for preventing lawn damage caused by grub infestations, especially in areas with past pest issues or heavy beetle activity. It helps avoid yellowing, thinning grass and the digging damage caused by animals feeding on grubs.

Compared to Other Lawn Treatments

Unlike short-term or reactive insecticides, GrubEx1 is a preventive solution—stopping grubs before they cause visible damage. It requires only one application per season, making it easier to manage than monthly treatments or combination weed-and-feed products.

Also Known As

• Scotts GrubEx1 99605
• GrubEx Lawn Insect Preventer
• Season-Long Grub Killer Granules
• Scotts Turf Grub Treatment