Jonathan Green Treflan Herbicide | 40 lb Bag

Define the standard of professional weed management across your landscape beds with Jonathan Green Treflan Herbicide, a high-performance granular pre-emergent engineered to stop annual grasses and broadleaf weeds before they germinate. Creating an impenetrable chemical barrier in the top soil layer when activated by moisture, this selective formula delivers up to three months of reliable protection without harming established ornamental flowers, trees, or shrubs. Stocked at our East Greenwich yard in heavy-duty 40 lb bags, it provides an efficient vegetation control solution for residential properties and commercial landscaping sites across southern New England, offering weather-stable performance that maintains integrity through changing seasonal conditions.

Key Features & Benefits

• Long-Lasting Defense: Delivers up to 3 months of reliable, single-application weed prevention to keep ornamental beds pristine with minimal maintenance.

• Ornamental Safety: Specially formulated selective action protects established landscape flowers, ground covers, nursery stock, shrubs, and trees from herbicide stress.

• Broad-Spectrum Prevention: Effectively halts tough annual weeds like chickweed, knotweed, and pigweed, alongside aggressive annual grasses such as crabgrass and foxtail.

• Uniform Granular Spread: Engineered for clean, consistent application using standard drop or rotary lawn spreaders for even yard coverage.

• Job-Site Efficiency: Packaged in a robust 40 lb bag designed for easy transport, accurate loading, and precise contractor inventory control.

Ideal Applications

• Professional commercial landscape beds and institutional parkways

• Residential ornamental flower gardens and perennial shrub borders

• Foundation plantings, tree rings, and decorative mulch beds

• Ground cover installations and architectural nursery stock yards

• Municipal parks, civic green spaces, and roadside landscape islands

Technical Specifications & Coverage

• Material Type: Granular pre-emergent herbicide (Trifluralin 5.0%)

• Color Family: Off-white to tan granules

• Unit Weight: 40 lb bag

• Coverage Estimate: Treats up to 22,000 square feet per 40 lb bag (standard application rate approximately 1.8 lbs per 1,000 sq. ft. based on label specifications).

Frequently Asked Questions

• Does this product kill existing weeds? No. Treflan is a pre-emergent herbicide designed strictly to stop weed seeds from germinating; it will not kill existing, actively growing weeds. Clear all current weeds manually or with a post-emergent before application.

• How do I activate the herbicide after spreading? The granules require moisture to form the soil barrier. Apply to clean, weed-free beds and activate promptly via overhead lawn irrigation or natural rainfall as directed on the manufacturer label.

• Is this safe to use around my established flowers and shrubs? Yes. When applied according to label instructions, Treflan targets germinating seeds in the soil matrix while leaving established ornamental plants, shrubs, and trees completely unharmed.

• How do I purchase this for my project? Order online for convenient local pickup at Watson Materials in East Greenwich, RI, or contact our team to coordinate job-site delivery across Rhode Island. (Prices shown are for pickup; please add delivery to your order if required. Deliveries are typically scheduled within a week unless backordered.)

Pro Contractor Tip: Prior to broadcasting Treflan granules, rake away any accumulated organic debris or leaves to ensure the granules make direct contact with the bare soil surface. Follow up immediately with 0.5 inches of irrigation or rainfall to lock the trifluralin barrier in place before weed seed germination windows open.