The label is the law. Rates and restrictions below are taken from the product labels listed under Sources. Your product's own label governs; read it before you mix or apply. Mixing calculator · Disclaimer
- Active ingredient
- Trifluralin
- Chemical class
- Dinitroaniline herbicide; WSSA Group 3 mitosis inhibitor that binds to tubulin and blocks microtubule assembly.[2]
- Mode of action
- WSSA Group 3: Mitosis inhibitors (dinitroanilines)[2][1]
- Signal word
- Lebanon Green Gold Garden Weed Preventer: Caution[1]
Which vegetables and flowers it's labeled for
Vegetables on the label are dry beans, southern peas, snap and lima beans, okra, and transplants of tomatoes, peppers, broccoli, Brussels sprouts, cabbage and cauliflower. Apply anytime from 6 weeks before planting up to planting day.[1]
Listed flowers include marigold, petunia, zinnia, snapdragon, daffodils, tulips, gladiolus, dahlia, sunflower and 20 others. Treat around flowers, shrubs and trees in spring once the plants are established.[1]
Where it is used
Before planting, loosen the soil, pull visible weeds, spread the granules evenly, then rake or spade them 2 to 3 inches deep, working in two directions at right angles.[1]
It must be worked in within 24 hours, either by at least half an inch of rain or irrigation or by mechanical mixing. Shallow hoeing later in the season won't reduce how well it works.[1]
It won't stop cocklebur, velvetleaf, jimsonweed, ragweed, nutgrass, or established bermudagrass and johnsongrass. Leave an untreated strip for corn, squash and any vegetable the label doesn't list.[1]
Keep it off ajuga, myrtle, pachysandra and other ornamental ground covers, which can be injured, and don't use it on muck soils.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Lebanon Green Gold Garden Weed Preventer[1] | Lebanon Seaboard Corporation | 961-335 | 1.75% | granules | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Lebanon Green Gold Garden Weed Preventer | Home vegetable gardens (listed beans, peas, okra and transplanted tomatoes, peppers and cole crops) | Crabgrass, foxtails, goosegrass, pigweeds, lambsquarters, purslane, chickweed and other annual weeds from seed | 0.67–1.33 lb product per 1,000 sq ft[1] The label rate is 1 lb per 1,500 sq ft on sandy soils, 1 lb per 1,000 sq ft on loam and 1 lb per 750 sq ft on silt and clay. Snap and lima beans never get more than 1 lb per 1,000 sq ft. |
| Lebanon Green Gold Garden Weed Preventer | Established ornamental shrubs, trees and listed flowers | Annual grasses and broadleaf weeds from seed | 1.0–1.33 lb product per 1,000 sq ft[1] 1 lb per 750 to 1,000 sq ft, applied in spring after plants are established. 1 lb is about 2 4/5 cups; 4 1/2 tablespoons covers 100 sq ft at the 1,000 sq ft rate. |
Safety and environmental hazards
People
Signal word CAUTION. It causes moderate eye irritation, and prolonged or frequently repeated skin contact may cause an allergic reaction in some people. Avoid contact with eyes and clothing.[1]
Pets
Don't let the granules contact people or pets, directly or by drift. Keep pets out during application and until dusts settle; if you water it in, wait until watering is done and the surface is dry.[1]
Bees and pollinators
The label has no bee-specific warning, but it notes the product is toxic to plants and can harm the forage and habitat of pollinators next to the treated area if it drifts.[1]
Fish and water
Extremely toxic to freshwater, marine and estuarine fish and aquatic invertebrates, including shrimp and oysters. Sweep granules off driveways and sidewalks back into the bed, and apply when no rain is expected for 24 hours.[1]
Common questions
- Can I use trifluralin garden weed preventer on my lawn?
- No. This garden product is labeled for home use only and is marked not for use on lawns.[1]
- Does trifluralin kill weeds that are already growing?
- No. It works on seeds as they germinate, so the label tells you to remove all visible weeds before spreading it.[1][2]
- How much trifluralin do I need for 100 square feet?
- The label chart gives 3 tablespoons at the light-soil rate, 4 1/2 tablespoons at the medium rate and 6 tablespoons at the heavy-soil rate per 100 sq ft.[1]
Sources
- U.S. EPA Pesticide Product Label System, “Lebanon Green Gold Garden Weed Preventer label, EPA Reg. No. 961-335 (EPA-stamped, Mar. 24, 2022).” www3.epa.gov/pesticides/chem_search/ppls/000961-00335-20220324.pdf (accessed 2026-10-06)
- Weed Science Society of America, “Summary of Herbicide Mechanism of Action According to the Weed Science Society of America.” wssa.net/wp-content/uploads/WSSA-Mechanism-of-Action.pdf (accessed 2026-10-06)