"Buy it! Easy to use and effective. I started seeing the weeds wilting instantly.. completely killed within 7 days. So happy to have found this product."
"Best weed killer I have used. Used in our lawn to remove a creeping weed. I highly recommend. It is the best weedkiller that I have ever used."
"This product fulfills what it promises. After 2 days almost everything had disappeared."
"Effective, easy to use. Excellent results!"
About FireHawk
A Bioherbicide is a weed control product derived from naturally occurring compounds. FireHawk Bioherbicide’s active ingredient is nonanoic acid, a fatty acid, for fast-acting non-selective contact weed control.
FireHawk Bioherbicide works on contact to rapidly desiccate weeds, by damaging only the green parts of plant tissue. It controls existing weeds only.
FireHawk Bioherbicide controls weeds, grasses, moss, and algae. Refer to the product label for species controlled.
Weed Control & Results
Apply FireHawk Bioherbicide only as directed on the label. It works best on actively growing weeds under 5 inches.
FireHawk Bioherbicide is for outdoor residential use in approved areas such as driveways, patios, walkways, gravel, flower beds, vegetable gardens, trees, and shrubs.
FireHawk Bioherbicide is fast-acting and starts working within hours.
Yes. FireHawk Bioherbicide is rainproof in 1 to 2 hours, depending on the product version and label directions.
Use & Safety
For FireHawk Ready-To-Use, people and pets may enter the treated area after the spray has dried. Always follow label directions for the product being used.
FireHawk Bioherbicide is non-selective and can affect lawn grasses and other desirable plants it touches. Shield nearby plants during application.
No. FireHawk Bioherbicide has no residual soil activity.
Larger or harder-to-control weeds may require multiple applications.
Availability & Regulation
FireHawk Bioherbicide is available online and through retail partners nationwide. Concentrate is currently approved in 49 states (48 states + California as of May 2025).
Direct Purchase (Official)
- FireHawkBioherbicide.com – Concentrate + Ready-to-Use (free shipping available)
Authorized Retailers
The Mill Stores – 32oz & 1-gallon Concentrate
State Restrictions
Recently approved
- California (May 2025; Concentrate now shipping, Ready-to-Use pending approval).
FireHawk Bioherbicide passed California's strict Department of Pesticide Regulation (DPR) review and is legal to buy/use in CA since May 2025 (Reg. 93740-5-AA). DPR registration proves the product is safe, effective, with proper labeling meeting CA standards—more rigorous than EPA alone.
