The Best Grub Killer for Lawns in 2026

Gregory Stewart

Updated on October 23, 2026

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For a fast curative knockdown of grubs that are already feeding, BioAdvanced 24 Hour Grub Killer Plus is a well-known choice, while Scotts GrubEx1 is a well-known season-long preventive that is applied before eggs hatch. If you want a chemical-free route, milky spore or beneficial nematodes are options, though results can be slower or less consistent. Which one you buy depends on one question: are you stopping an infestation that is already chewing up roots, or preventing one next summer? Whatever you choose, follow the product label exactly, including rates, timing, and watering-in instructions.

Reviewed against the manufacturer and extension sources named in this article. Coverage per bag varies by size and retailer, so check the label of the exact package you buy.

How I picked these grub killers

These picks are based on manufacturer labels, university extension guidance and published reviews. I have not field-tested every product. I do not take payment from any insecticide company beyond the affiliate links disclosed above.

When shopping for grub control, ignore the front-of-bag adjectives and read the active ingredient line. That detail tells you more than a “best seller” sign.

Here are the criteria used to rank the grub killers in this guide:

• Curative vs. preventive job. A common mistake is buying a preventive product after grubs are already feeding and expecting it to kill large grubs. I separate the two so you don’t waste money.
• Active ingredient, not the brand name. Trichlorfon is used for curative control. Chlorantraniliprole is used for prevention. I judge each product on its chemistry and label.
• Coverage per bag. Compare the square footage on the label to the area you need to treat.
• Safety for family, pets, and other insects. Some controls are harder on beneficial insects than others. Always follow the label’s re-entry and watering-in directions.
• Ease of application. Granules spread with a broadcast spreader are generally more forgiving than concentrates you have to mix.

What lawn grubs actually are (and why timing beats product choice)

Lawn grubs are the larval stage of beetles, most commonly Japanese beetles, June beetles, and European chafers. The white, C-shaped grub you dig up in the soil is the same insect that, as an adult, feeds on garden plants. The right product depends on where the insect is in its life cycle. Grubs attack from below, eating roots, so damage may not show until the grass is already failing.

The general life cycle: adult beetles emerge and lay eggs in turf in early to mid summer. Eggs hatch into young grubs that feed on grass roots through late summer and fall. As soil cools, grubs move deeper to overwinter, then return nearer the surface in spring for more feeding before pupating. Exact timing varies by species and region, so check your state extension service for local dates.

That timeline is why the calendar matters more than the brand. A preventive generally has to be applied before eggs hatch and young grubs start feeding, while a curative is applied when larger grubs are already feeding. Applied at the wrong time, even a good product will disappoint.

How to know you actually have a grub problem

Before you buy anything, confirm it’s grubs and not drought, disease, or another pest. Signs of a grub infestation:

• Brown patches that spread and don’t green up after watering.
• Turf that peels back like a loose carpet because the roots underneath have been eaten.
• Increased digging by skunks, raccoons, and birds tearing up the lawn in search of grubs.
• Grubs when you cut and lift a square-foot section of sod. University extension guidance commonly cites a treatment threshold of roughly 5 to 10 grubs per square foot for cool-season lawns, with lower or higher numbers depending on the grass and the situation; check your local extension for its figure.

The 5 best grub killers for lawns

Each link below goes to an Amazon search with our affiliate tag. Confirm the exact listing before you check out, and read the label of whatever you buy. Read the short pros and cons under each before you decide.

1. BioAdvanced 24 Hour Grub Killer Plus — curative (for active grubs)

BioAdvanced 24 Hour Grub Killer Plus

Best for: an active grub infestation discovered in late summer or fall.

The active ingredient is trichlorfon, a fast-acting insecticide used for curative control of grubs that are already feeding. Retailers list its coverage differently by bag size, so rely on the label of your package. It is not sold in every state (some retailers list restrictions for California and Maine), so check availability where you live.

• Pros: curative option for grubs that are already feeding; granule form.
• Cons: trichlorfon is a stronger insecticide that can affect non-target insects; follow the label’s watering-in and re-entry directions; it is not a season-long preventive; not available in all states.
• Who it’s for: anyone past the prevention window who needs to act this season.

2. Scotts GrubEx1 Season-Long Grub Killer — preventive

Scotts GrubEx1 Season-Long Grub Killer

Best for: stopping next year’s grubs before they damage roots.

Scotts lists chlorantraniliprole as the active ingredient, and its product page lists 5,000 sq ft of coverage for the standard bag. It is a preventive intended to be applied ahead of the egg-laying and hatching window, then watered in as the label directs. It is not meant to rescue a lawn already full of large grubs.

• Pros: preventive product that can be applied with a broadcast spreader; designed for a single application per season at label timing.
• Cons: not a cure for big grubs; timing-dependent.
• Who it’s for: homeowners who plan ahead and want to protect a lawn that has had grubs before.

3. GreenView Grub Control — alternative preventive

GreenView Grub Control

Best for: shoppers comparing preventive options across brands.

I could not confirm this product’s current active ingredient or coverage from the manufacturer, so check the label before buying and compare the active ingredient with other preventives. Apply it on the schedule printed on the label.

• Pros: another preventive option to compare.
• Cons: verify the active ingredient and timing on the label yourself; less shelf presence in some stores.
• Who it’s for: shoppers comparing labels who are open to alternatives to the better-known brand.

4. St. Gabriel Organics Milky Spore — organic, long-term control

St. Gabriel Organics Milky Spore

Best for: a chemical-free approach aimed at Japanese beetle grubs specifically.

Milky spore is a bacterium (Bacillus popilliae, now often classified as Paenibacillus popilliae) that targets Japanese beetle grubs. It is meant to build up in the soil over time, and it does not control other grub species. University extension sources generally describe the results as slow and inconsistent, so treat it as a long-term supplement rather than a rescue.

• Pros: biological and non-chemical; narrowly targeted to Japanese beetle grubs.
• Cons: slow to establish; does not control other grub species; results vary by climate and soil.
• Who it’s for: patient gardeners who prefer a low-chemical approach.

5. Beneficial nematodes — biological option

NaturesGoodGuys Beneficial Nematodes

Best for: an organic grub option that is not a conventional insecticide.

Beneficial nematodes are microscopic worms that seek out and infect grubs in the soil. They are living organisms, so the package will specify storage, soil temperature and moisture requirements, and a use-by date. Which nematode species the product contains matters for grub control, so check the label.

• Pros: biological option; not a conventional insecticide.
• Cons: live product with a short shelf life; needs careful timing and consistent moisture; coverage varies by package.
• Who it’s for: anyone who wants a biological approach and can follow the handling directions closely.

Curative vs. preventive: the timing that decides your purchase

This table maps the general grub life cycle to the product type that fits. Dates shift by region, so confirm local timing with your extension service and follow the label for any product you use.

Late summer is the stretch where more options work, because grubs are still small and near the surface. Most grass types respond the same way to this timing, cool-season and warm-season lawns alike, because you are targeting the insect’s calendar rather than the turf. Matching the month to the table, then reading the label, gets you more out of whatever you buy.

When a grub killer won’t work (skip it in these cases)

A grub killer is the wrong purchase when:

• Your brown patches aren’t grubs. Drought stress, pet urine, fungal disease, and dull mower blades all cause discoloration. Do the lift-a-square-of-sod test first. If counts are below your extension’s threshold, treatment may not be worth it and can harm other insects.
• It’s mid-winter. Grubs have moved deeper to overwinter. Wait for spring or next summer’s prevention window.
• You bought a preventive but already have large fall grubs. Preventives are not designed to rescue an active infestation of mature larvae. You need a curative product, used per its label.
• The damage is done and the season is over. Sometimes the right move is recovery, meaning overseeding and watering, rather than adding more product to dead turf. If you’re reseeding the bare spots, the guide on how long it takes for grass seed to grow will set expectations.

Granules vs. liquid: which form should you buy?

Most homeowners find granules simpler. You load them into a broadcast spreader, walk the lawn, and water them in as the label directs, with no mixing or measuring of concentrate. Liquid concentrates can suit large properties and spot treatment but demand more care in measuring and mixing. Whatever form you choose, follow the label on application rate and watering-in, since skipping that step is a common reason products underperform.

Will killing grubs fix my whole lawn? (Quick answers)

Does grub killer also stop weeds? No. Grub products are insecticides, not herbicides. If you’re also fighting weeds, see the guides on getting rid of crabgrass and getting rid of clover in your lawn.

Will the lawn green back up on its own after I kill the grubs? Lightly damaged turf often recovers with watering and time. Heavily damaged areas where the roots are gone usually need overseeding to fill in.

Do I need to reapply every year? Preventive labels typically call for application each season you want protection, so follow the label and check local grub pressure.

FAQ

What is the best grub killer for lawns overall?

For most homeowners planning ahead, a preventive such as Scotts GrubEx1 (chlorantraniliprole) applied at the label’s timing is a common choice. If grubs are already damaging your lawn, a curative such as BioAdvanced 24 Hour Grub Killer Plus is designed for that situation. Always follow the label.

When is the best time to apply grub killer?

Preventives are generally applied in late spring to early summer, before eggs hatch, though exact label timing varies by product. Curatives are for late summer and fall, when grubs are actively feeding. Follow the label on watering the product in.

What is the best way to kill grubs naturally?

Beneficial nematodes and milky spore are the two common biological options. Nematodes are living organisms that need careful timing and moisture. Milky spore only targets Japanese beetle grubs and is generally described by extension sources as slow and inconsistent.

How many grubs per square foot is too many?

A healthy lawn tolerates some grubs. University extension guidance commonly cites roughly 5 to 10 per square foot as a treatment threshold for cool-season turf, but it varies by grass type and region, so check your local extension office.

Are grub killers safe for pets and kids?

That depends on the product. Read the label for re-entry instructions, watering-in directions, and any pet or child precautions, and keep people and pets off the lawn for as long as it says. Curative insecticides such as trichlorfon have stricter precautions than most biological options, so follow the label carefully.