Scotts GrubEx Season Long Grub Killer 15.27 Lb.

Scotts GrubEx Season Long Grub Killer delivers professional-grade grub prevention with 0.08% Chlorantraniliprole that protects lawns for up to 4 months from a single spring application. The 15.27 lb bag covers 10,000 sq ft — enough for most residential properties or a solid commercial contract section. This preventative treatment kills grubs as they hatch, stopping damage before it starts, and controls Japanese beetle larvae, armyworms, chinch bugs, billbugs, and crane-fly larvae.

Montana’s late spring thaw makes the mid-April to early June application window particularly critical. Miss that window and you’re dealing with active infestations instead of preventing them. Contractors know the difference — products like Dylox handle curative treatment for late-summer infestations, but prevention beats cure every time.

Technical Specifications and Coverage

The numbers matter for accurate job bidding:

Specification	Value
Active Ingredient	Chlorantraniliprole (0.08%)
Coverage	10,000 sq ft
Package Weight	15.27 Lb
EPA Registration	538-306
Protection Duration	Up to 4 months
Application Frequency	One per year

Spreader settings eliminate the guesswork: Scotts Broadcast Rotary at 3¾, Drop Spreader at 7¼, or Wizz Spreader at 4¼. Those precise settings matter — too heavy wastes product and profits, too light leaves gaps in coverage.

The critical step contractors can’t skip: immediate watering with a 20-minute soak to activate the product and wash granules into the soil. Skip that step and you’ve just spread expensive fertilizer that won’t touch a single grub.

Multi-Pest Control Value

The target pest list reads like a Montana lawn’s worst nightmare: white grubs (including Japanese beetle, Asiatic garden beetle, European chafer), armyworms, cutworms, sod webworms, chinch bugs (suppression), billbug grubs, and crane-fly larvae. GrubEx also helps reduce mole activity by eliminating their food source — solve the grub problem and the mole problem often follows.

Billbugs particularly thrive in Montana’s cool-season grasses. One preventative application handles multiple problems that would otherwise require separate treatments through the season.

Professional Application Process

The application sequence demands attention: mow 1-2 days before application, apply to dry lawn using proper spreader settings, immediately water (20-minute soak), and sweep granules off hard surfaces back onto lawn. Works on both cool-season and warm-season grasses but stays out of vegetable gardens and flower beds.

Environmental restrictions matter for responsible contractors: avoid application near water bodies (ponds, streams) or blooming weeds/flowers where bees are active. The EPA registration (538-306) backs the safety profile when used correctly.

The Contractor’s Verdict

Scotts backs GrubEx with their No-Quibble Money Back Guarantee — keep the receipt and UPC for returns. Professional contractors rate it 3.9 out of 5 based on 246 reviews, with effectiveness tied directly to proper timing and application.

The 4-month protection window from a single spring application aligns perfectly with Montana’s condensed growing season. Apply once when soil temps hit 50-55°F (typically mid-April to early June depending on elevation) and move on to other jobs. No callbacks for grub damage through September.

At 15.27 pounds covering 10,000 square feet, the math works out to roughly 1.5 pounds per thousand square feet — standard for professional turf management. The granular formulation spreads evenly without drift concerns on Montana’s occasional windy spring days.

For lawn care contractors building seasonal service packages, GrubEx offers predictable results that reduce emergency callbacks. The preventative approach beats explaining dead patches to unhappy customers in August.

Frequently Asked Questions

What happens if I apply GrubEx too late in the season?

Once grubs are actively feeding in late summer, GrubEx won’t provide effective control — you’ll need a curative treatment like Dylox instead. The product works by killing grubs as they hatch, not established populations.

Can I use GrubEx in my vegetable garden for pest control?

No — application is restricted to lawns only. Do not use in flowerbeds or vegetable gardens. The product targets soil-dwelling lawn pests specifically.

How soon after application is the lawn safe for pets?

After proper watering in (20-minute soak), allow the lawn to dry completely before allowing pet access. The granules need to be washed into the soil where they become active.

Does GrubEx actually prevent moles?

GrubEx helps reduce mole activity by eliminating grubs — their primary food source. No grubs means moles move elsewhere for food, though it won’t eliminate moles already present for other food sources.

What’s the shelf life of unopened GrubEx?

Store unopened bags in a cool, dry location. Check the product packaging for manufacturer-printed expiration dates — granular products typically maintain effectiveness for 2-3 years when stored properly.