Jonathan Green Corn Gluten Weed Preventer

Product Description

Jonathan Green Corn Gluten Weed Preventer plus Lawn Food feeds the lawn  while preventing crabgrass, dandelions and over 25 other broadleaf and  grassy weeds. For optimal results apply early in the spring- between  March and early May- before weeds germinate. For improved weed control  and greening apply up to 4 times a year, in early and late spring and  again in early and late fall. 


15lb bag (5,000 sq.ft.) - $49.98

  • Safe to use around children and pets
  • Better for the environment than other pre-emergent crabgrass preventers 
  • Controls crabgrass, dandelions and over 25 other weeds prior to germination
  • Provides gentle feeding and deep greening
  • Can be used in flower gardens and in planting beds
In-store quantities & prices may vary on some items.
Maximum quantity available reached.

When to Apply:

The best time to apply is in early spring before target weeds, like crabgrass, dandelions or other broadleaf weeds germinate.

For improved weed control and greening apply up to 4 times a year: in early and late spring, and early and late fall.


Weed control provided by this product is directly related to the proper application rate but will vary somewhat depending on weather, weed pressure, turfgrass competitiveness, location, and climate.  It may take a few seasons to control severe weed populations.  This product provides “pre-emergence” control meaning it must be used prior to weed germination

For Lawns:

Use a rotary or drop lawn spreader.  To select the proper setting see the Spreader Settings see the Spreader Settings Online Tool tab.

Apply around the perimeter of the lawn to establish a turning area.  Then run the spreader back and forth within the area outlined by your first perimeter application. Always allow overlap to avoid gaps in coverage.

For Gardens:

Spread Corn Gluten Weed Preventer on the surface of the soil after flowers or other plants have been planted. Incorporating this product into the soil will hurt the roots of the flowers, vegetables, and landscape plants in the garden.


Sweep any excess granules off of hard surfaces and back onto the lawn.  For best results, irrigate the treated area after application for 15 to 30 minutes and then allow it to dry for 2 to 3 days.  Excessive rainfall or irrigation may require re-application for effective weed control.  Do not seed for 60 to 90 days after application.


Coverage area: 7.5 lb Bag – 2,500 sq. ft. 15 lb Bag – 5,000 sq. ft.

Analysis: 10-0-2

Can be used when seeding: No

Safe for Children & Pets: Yes

Apply to Dry or Damp Lawn: Dry Application

Temperature Range: 50° – 80°F


Click the link to the Jonathan Green Product Page and navigate to the Spreader Settings tab for recommended spreader settings.