Concern
Concern Weed Prevention Plus with Corn Gluten 8-2-4
Best natural solution for homeowners seeking weed prevention and lawn fertilization.
Prevent weeds before they start with Concern Weed Prevention Plus, a dual-action granular formula. It uses corn gluten meal to naturally suppress weed seeds while simultaneously fertilizing your lawn with an 8-2-4 NPK ratio. This product promotes fast green-up and lush growth without the risk of burning your turf. A single 25 lb bag covers up to 1,500 square feet, offering up to 90% weed control effectiveness in the first year for a beautifully maintained lawn.
$46.22
Owner Satisfaction
4.0
/ 5
Category Rank
487
/ 556
#487 in Herbicides
Price vs Category Average
-53%
Below average
Fertilizer Analysis
824
/ -- NPK
Who it's for
- Parents and pet owners prioritizing non-toxic lawn care
- Homeowners seeking a simple, all-in-one lawn maintenance solution
- Eco-conscious gardeners focused on long-term soil health
Who should skip it
- Gardeners planning to overseed or repair bare lawn patches
- Busy homeowners unable to commit to strict application schedules
- Budget-conscious shoppers comparing costs against synthetic alternatives
Performance breakdown
Weed Suppression
Corn gluten meal provides reliable pre-emergent control for common lawn weeds.
Fertilization Potency
The 8-2-4 NPK ratio delivers steady, balanced nutrition for healthy turf.
Application Safety
Natural formula eliminates the risk of burning sensitive grass blades.
Coverage Efficiency
Fifteen hundred square feet per bag suits smaller residential lawn footprints.
Ease of Application
Granular consistency ensures smooth, even distribution with standard spreaders.
Greening Speed
Formulated for rapid nutrient uptake to achieve a lush appearance quickly.
Key Specs
Fertilizer Analysis
8-2-4 NPK
Net Weight
25 lb
Coverage Area
1,500 sq ft per bag
Active Components
Corn gluten meal, bone meal, potassium sulfate
Form
Granular
Weed Control Efficacy
Up to 90% in the first year
Know before you buy
Corn gluten meal acts as a pre-emergent herbicide by inhibiting the root development of germinating weed seeds. Because it prevents the seeds from establishing a root system, the weeds die shortly after sprouting.
No, you should avoid using this product on newly seeded areas. Since it prevents seeds from rooting, it will inhibit your new grass seed from germinating as well.
No, this is a pre-emergent herbicide, meaning it only stops new weeds from germinating. It will not kill or control weeds that have already sprouted and established themselves.
You will typically notice a fast green-up of your existing grass due to the 8-2-4 fertilizer blend shortly after application. The weed prevention benefits will become apparent as you see fewer new weeds emerging over the following weeks.
Concern Weed Prevention Plus is made with natural ingredients like corn gluten meal, bone meal, and potassium sulfate. While it is generally considered safer than synthetic chemical herbicides, it is best practice to keep pets and children off the lawn until the granules have been watered in and the area has dried.
For best results, apply the product in early spring before weed seeds begin to germinate. Depending on your local climate and weed pressure, a second application later in the season may be beneficial to maintain coverage.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$46