St Gabriel Organics Milky Spore Powder
Best long-term solution for eco-conscious homeowners managing lawn grubs.
Effectively manage grub and Japanese Beetle infestations with St. Gabriel Organics Milky Spore Powder. This all-natural biological insecticide utilizes beneficial bacteria to target and eliminate grubs, ensuring a healthy lawn without harming pets, people, or beneficial insects. A single application provides long-lasting protection, guaranteed for up to ten years, making it a convenient and eco-friendly pest control solution for your lawn and garden.
$40.99
Owner Satisfaction
4.6
/ 5
Category Rank
357
/ 1717
#357 in Pesticides
Price vs Category Average
-8%
Below average
Active Ingredient
Paenibacillus popilliae
/ Paenibacillus popilliae
Who it's for
- Busy property owners wanting a low-maintenance, one-time application
- Homeowners seeking a long-term, set-it-and-forget-it lawn solution
- Eco-conscious gardeners prioritizing safety for pets and beneficial insects
Who should skip it
- Budget-focused landscapers managing large properties
- Gardeners needing immediate relief from active grub infestations
- Residents in cooler climates with short, unpredictable growing seasons
Performance breakdown
Application Longevity
A single treatment provides nearly a decade of reliable grub suppression.
Safety Profile
Biological formula keeps pets and beneficial pollinators completely out of harm's way.
Target Specificity
Highly effective at isolating Japanese Beetle grubs without disrupting lawn ecosystems.
Ease of Application
Powder distribution requires patience to ensure even coverage across the lawn.
Organic Compliance
OMRI listing guarantees adherence to strict organic gardening standards.
Coverage Efficiency
Ten-ounce container handles smaller plots but requires bulk for larger landscapes.
Key Specs
Active Ingredient
Paenibacillus popilliae
Coverage Area
Up to 2,500 sq ft (10 oz)
Form
Powder
Pest Type
Japanese Beetle Grubs
Application Longevity
Up to 10-20 years
Weight
0.625 lbs
Pesticide Type
Biological/Natural
OMRI Listed
Features
- All-natural, safe formulation
- Long-term grub and beetle control
- One-time application lasts up to 10 years
- Safe for pets and beneficial insects
- Targets grubs and Japanese Beetles
- Eco-friendly pest management
What customers say
Customers overwhelmingly appreciate the ease of applying St Gabriel Organics Milky Spore Powder, noting the simple process requires minimal effort. The primary theme is reliability, specifically the product's long term effectiveness in controlling Japanese beetle grubs. While users understand the need for patience as the spores establish, the consensus is that this organic solution provides a permanent, trustworthy defense for the lawn. This high level of confidence in its lasting results justifies the initial cost, making it a highly valued investment for garden health.
Know before you buy
The powder contains Paenibacillus popilliae, a naturally occurring bacterium. When grubs ingest the spores while feeding on grass roots, the bacteria multiply inside them, eventually killing the grub and releasing more spores into the soil to protect your lawn for years.
Yes. Because it is a biological insecticide that specifically targets Japanese Beetle grubs, it is non-toxic to humans, pets, birds, and beneficial insects like earthworms or bees.
Milky Spore is a long-term solution rather than an instant fix. It typically takes one to three years for the bacteria to fully establish in the soil and reach peak effectiveness, though it provides lasting protection once settled.
No. One of the primary benefits of this product is that a single application can remain effective for up to 10 to 20 years, provided the soil conditions remain stable.
It is effective in most soil types, but the bacteria require a certain level of soil temperature to germinate and spread. It works best when applied during the growing season when the soil is warm.
St. Gabriel Organics Milky Spore is specifically formulated to target Japanese Beetle grubs. It may not be effective against other species of lawn grubs, such as European Chafers or June Beetles.
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$41