Season Long Lawn Weed Killer + Preventer for Southern Lawns
Best long lasting solution for southern lawn weed control.
This BioAdvanced Season Long Southern Lawn Weed Preventer is specifically formulated for Southern lawns, effectively killing listed broadleaf weeds like dandelion, clover, and dollarweed. It also prevents a wide range of grassy and broadleaf weeds, including crabgrass, for up to six months. The formula begins working immediately, eliminating weed growth within weeks, and is safe for established Southern turfgrasses such as Bermudagrass and all varieties of St. Augustinegrass, including Floratam. This 10-pound product covers up to 4,000 square feet, offering season-long control against over 50 listed lawn weeds.
$24.98
More Season Long Weed Killer + Preventer Options
Owner Satisfaction
4.3
/ 5
Category Rank
397
/ 555
#397 in Herbicides
Price vs Category Average
-74%
Below average
Who it's for
- Homeowners seeking a complete solution for current and future lawn weed issues.
- Busy individuals desiring long-lasting weed defense without constant maintenance.
- Gardeners with Southern lawns needing specialized, non-damaging weed treatment.
Who should skip it
- Homeowners with cool-season grasses who require a different product.
- Environmentally conscious users preferring natural or chemical-free lawn solutions.
- Novice users or those who prefer a more forgiving application process.
Performance breakdown
Weed elimination speed
Visible results appear quickly, effectively targeting stubborn southern lawn invaders.
Prevention longevity
Creates a robust barrier that keeps new weeds from germinating all season.
Grass safety
Formulated to protect delicate southern turf varieties from chemical burn.
Application ease
The integrated sprayer simplifies coverage for large, sprawling lawn areas.
Rainfast reliability
Stays effective even after light rainfall shortly following the initial application.
Broadleaf control
Highly effective at clearing out common weeds like clover and dandelion.
Know before you buy
No, this formula is specifically designed to be safe for common Southern lawn grasses, including St. Augustine, Bermuda, Centipede, and Zoysia, when used as directed.
This product provides up to six months of weed control. It works by creating a barrier in the soil that prevents new weeds from germinating while killing existing ones.
You should avoid using this product if you plan to seed or overseed your lawn. The preventative action that stops weeds will also prevent your new grass seeds from germinating.
It is best to keep children and pets off the treated area until the spray has completely dried. Once the surface is dry, it is generally safe for them to return to the lawn.
This is a systemic herbicide, meaning it is absorbed through the leaves and roots of the weeds. It travels through the plant to kill it down to the root, which is more effective than simple contact-killing sprays.
Still have a question?
Ask Hayley anything about this product before you decide.