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Milky Spore Granular Organic Mix
Milky Spore Granular Organic Mix is an organic, long-lasting insecticide granule that controls the grub stage of a Japanese Beetle. When applied to your turf's soil, the product will last up to 10 years against the Beetle.
09/21/25
Milky Spore Granular Organic Mix, manufactured by St. Gabriel Organics, is an easy-to-apply water-soluble granule that specifically works against the Japanese beetle's grub stage. Once applied to the soil, it will remain dormant until grubs begin feeding on grass roots and ingest the product.
Once the grub ingests the Milky Spore Granular Organic Mix, the spores in the product multiply inside it, and within a week, the grub dies. As the Japanese Beetle grub decomposes, it releases the product back into the soil, creating a long-lasting residual effect for up to 10 years.
Due to its organic natural ingredient, bacillus papillae 0.02%, Milky Spore Granular Organic Mix will eliminate the Japanese Beetle Grub without harming the environment, pets, plants, shrubs, or beneficial insects.
Tools Needed
You will need a type of drop spreader and the appropriate personal protective equipment (PPE) that will protect your face, eyes, mouth, hands, and feet.
How to Use
- Step 1: Determine where Japanese Beetle Grub is located or the area most active. Calculate how much Milky Spore Granular Organic Mix to apply to the treatment area by determining the square footage of the treatment area. To do this, measure and multiply the area length times the width (length X width = square footage). The use rate of Milky Spore Granular Organic Mix is 1 lb. per 350 sq. ft. or 20 lb. per 7,000 sq. ft. For maximum build-up, apply this product for two years in spring, summer, and fall. Once established, it may remain viable for up to 10 years.
- Step 2: Fill the spreader with Milky Spore Granular Organic Mix and set it to the correct setting for your specific spreader model (check the label for details). If you are unsure which setting to use with your spreader, you can test your spreader settings on 350 sq. ft. of turf. You are aiming to apply 1 pound of product per 350 sq. ft.; adjust your settings until this rate is reached.
- Step 3: Begin broadcasting Milky Spore Granular Organic Mix at the edge of the lawn and walk around the yard's perimeter steadily. Then, walk back and forth across the yard straight to cover the space in the middle. After completing the application, lightly water the treatment area and not mow until the product is dry.
Where to Use
Milky Spore Granular Organic Mix can be used on lawns, gardens, flower beds, ground covers, vegetable gardens, trees, and shrubs around homes.
When to Use
For the best results, apply during spring and late summer/early fall for the first two consecutive years. It is best to apply before the grubs hatch and when the ground is not frozen.
Safety Information
Milky Spore Granular Organic Mix is safe to use around children or pets when applied according to the product label. Always wear the appropriate personal protective equipment (PPE) when mixing or applying this product.
Special Considerations
Milky Spore Granular Organic Mix is a two-year, consecutive program, but once this time has passed, it will last within your property for up to 10 years.
You cannot mow your property until the granules have been watered into the soil and soaked into the soil for at least 24 hours.
Availability | Online |
Restricted Use | No |
Shipping Restrictions | 15 Pounds: AK, CA, CT, HI, MI, NY, OR, RI, SC, WA |
Brand | ST. GABRIEL ORGANICS |
Keith's Pro Tips | "To reach maximum spore levels in the soil and achieve best grub control, Milky Spore Granular should be applied before grubs hatch in the spring, summer, and fall for 2 consecutive years. The times of year can vary, but for better remembrance of application dates, apply on Memorial Day, Fourth of July, and Labor Day for each holiday that falls within the given season to be applied in." |
Product Drawbacks | Milky Spore Granular Organic Mix will only target the grub stage of the Japanese Beetle. |
Target Pests | Japanese Beetle Grubs |
Application Equipment | Push Spreader |
Application Methods | Broadcast Spray |
Active Ingredient | Bacillus Popilliae 0.02% |
Product Type | Insecticide |
Formulation | Granular |
Application Rate | Milky Spore Granular Organic Mix is a ready-to-use granular and does not require mixing. |
Shelf Life | Milky Spore Granular Organic Mix will last from up to 3 to 5 years when stored in a cool, dry location away from direct sunlight in its original container. |
Yield | 15 lbs. of Milky Spore Granular Organic Mix can cover 5,250 sq. ft. |
Use Sites | Outdoors |
Time to Kill | After applying Milky Spore Granular Organic Mix, results will be seen within 30 days. Additional reapplications are necessary in the first 2 consecutive years. Apply once in the spring, summer, and fall making a total of 6 applications within the 2 year time frame. Once established it will continue to eliminate grubs for up to 10 years. |
Comparable Products | Bio Advanced Grub Control Plus Turf Revitalizer |
EPA Registration # | 63191-16 |
Restricted Use | No |
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Shipping Restrictions | AK, CA, CT, HI, MI, NY, OR, RI, SC, WA |
Availability | Online |
Signal Word | CAUTION |
Keith's Pro Tip | "To reach maximum spore levels in the soil and achieve best grub control, Milky Spore Granular should be applied before grubs hatch in the spring, summer, and fall for 2 consecutive years. The times of year can vary, but for better remembrance of application dates, apply on Memorial Day, Fourth of July, and Labor Day for each holiday that falls within the given season to be applied in." |
Target Pests Multi | Japanese Beetle |
Time to Kill | After applying Milky Spore Granular Organic Mix, results will be seen within 30 days. Additional reapplications are necessary in the first 2 consecutive years. Apply once in the spring, summer, and fall making a total of 6 applications within the 2 year time frame. Once established it will continue to eliminate grubs for up to 10 years. |
Chemical Type | Insecticide |
Formulation | Granular |
Application Methods | Broadcast Spray |
Product Drawbacks | Milky Spore Granular Organic Mix will only target the grub stage of the Japanese Beetle. |
Active Ingredient | Bacillus Popilliae 0.02% |
Application Equipment | Push Spreader |
Mix Rate | Milky Spore Granular Organic Mix is a ready-to-use granular and does not require mixing. |
Use Sites | Outdoors |
Yield | 15 lbs. of Milky Spore Granular Organic Mix can cover 5,250 sq. ft. |
EPA Registration No. | 63191-16 |
Shelf Life | Milky Spore Granular Organic Mix will last from up to 3 to 5 years when stored in a cool, dry location away from direct sunlight in its original container. |
Comparable Products | Bio Advanced Grub Control Plus Turf Revitalizer |
Children or pets? | No |
Property Characteristics | None |