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PBI GORDON
Trimec Classic Broadleaf Herbicide
Trimec Classic Broadleaf Herbicide is a post-emergent, selective 3-way herbicide used to control over 90 broadleaf weeds, including clover, dandelion, and chickweed. It has a flexible label, low odor, and can be used on warm—and cool-season grasses.
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Trimec Classic Broadleaf Herbicide product page
Min : 81.58 - Max : 181.95
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Price as of
09/08/25
09/08/25
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Trimec Classic Broadleaf Herbicide, manufactured by PBI Gordon, is a proven and potent 3-way herbicide that selectively controls emerged broadleaf weeds in warm and cool-season grasses.
With three active ingredients, Trimec Classic offers increased and effective control of over 90 hard-to-kill broadleaf weeds, including dandelion, knotweed, plantain, and henbit.
Trimec Classic features a broad label and is ideal for use on various grass types in various locations. With a low odor and synergistic action, Trimec Classic helps keep costs low while making applications simple.
Tools Needed
To use Trimec Classic, you will need a handheld pump or backpack sprayer for smaller applications. For acreage applications, you will need a pesticide spray rig.
How to Use
- Step 1: Determine how much Trimec Classic Broadleaf Herbicide to use by measuring the square footage of the treatment area. Do this by measuring the treatment area's length and width in feet, and then multiplying them together (length X width = square footage). For acreage, take your square footage and divide by one acre (square footage / 43,560 sq. ft. = acres). For cool-season grasses, apply 2 to 4 pints of Trimec Classic in 20 to 260 gallons of water per acre or apply 1.2 to 1.5 fluid ounces of product in 0.5 to 6 gallons of water per 1,000 square feet. For Bentgrass, Centipedegrass, and St. Augustine grass, apply 1 fluid ounce of product with 5 gallons of water per 1,500 square feet.
- Step 2: Fill your tank with half the amount of water, add the measured amount of product, and then pour in the remaining half of the water. Agitate the sprayer tank until the solution is mixed.
- Step 3: Apply your solution evenly over the treatment area. Spray to the point of wet, not runoff. Higher rates are recommended when making spring applications for clover control.
Where to Use
Trimec Classic can control broadleaf weeds on ornamental and established turf in institutional, commercial, and residential sites. These sites include, but are not limited to, hospitals, nursing homes, schools, museums, libraries, sports facilities, golf courses, office buildings, homes, apartment complexes, condominiums, parks, streets, retail outlets, and cemeteries.
When to Use
This product is best used during spring or early fall when weeds are actively growing and not yet established. Apply on calm days when wind speeds are low to minimize drift. Avoid application when air temperatures exceed 90 degrees Fahrenheit and during long dry periods unless adequate irrigation is available.
Safety Information
Trimec Classic is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.
Keep people and pets out of treated areas until 48 hours have passed after application.
Special Considerations
Though Trimec Classic is labeled for use in warm-season grasses like St. Augustine grass, an injury may occur to the turf after application. Be sure to follow the label directions when applying warm-season grasses. The slight yellowing of the turf will disappear after about one week. Do not apply Trimec Classic to St. Augustine grass during the spring green-up period to avoid further injury.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions | 2.5 Gallon: AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, TX, VT, WA 1 Gallon: AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, TX, VT, WA |
| Brand | PBI GORDON |
| Keith's Pro Tips | "Do your best to avoid applying Trimec Classic when air temperatures are over 90 degrees Fahrenheit as some injury to turf grass may be seen." |
| Product Drawbacks | Trimec Classic may damage centipedegrass and St. Augustine grass. St. Augustine grass is especially vulnerable during spring green-up. |
| Target Pests | Trimec Class is labelled to control annual fleabane, aster (white heath and white prairie), bedstraw, beggarticks, beggarweed (creeping), bindweed, birdsfoot trefoil, black medic, broadleaf plantain, buckhorn plantain, bull thistle, burclover, burdock (common), buttercup (creeping), Carolina geranium, carpetweed, chickweed (common), chicory, cinquefoil, clover, cocklebur, compassplant, curly dock, dandelion, dayflower, deadnettle, dock, dogfennel, dovefoot geranium, English daisy, false dandelion (spotted catsear, common catsear), field bindweed (morningglory, creeping jenny), field madder, field oxeye-daisy (creeping oxeye), field pennycress, filaree (whitestem and redstem), Florida pursley, ground ivy, groundsel, hairy bittercress, hawkweed, healall, henbit, horsenettle, horseweed, innocence (blue-eyed Mary), jimsonweed, lambsquarters, lawn burweed, lespedeza (common), mallow (common), matchweed, mouseear chickweed, mustard, nettle, old world diamond flower, Oxalis (yellow woodsorrel), parsley-piert, Pennsylvania smartweed, pennywort (dollarweed), pepperweed, pineappleweed, plantain, poison ivy, poison oak, prostrate knotweed, puncturevine, purple cudweed, purslane, ragweed, redweed, red sorrel (sheep sorrel), roundleaf greenbriar, shperhard's purse, spotted spurge, spurge, sunflower, thistle, velvetleaf (buttonweed), Venice mallow, Veronica (corn speedwell), Virginia buttonweed, western salsify, white clover, wild carroy, wild garlic, wild geranium, wild lettuce, wild mustard, wild onion, wild strawberry, yarrow, yellow rocket. |
| Application Equipment | Backpack Sprayer, Gloves, Hose End Sprayer, Pump Sprayer, Respirator Mask, Spray Rig |
| Application Methods | Broadcast Spray, Spot Treatment |
| Active Ingredient | Dimethylamine salt of 2,4-dichlorophenoxyacetic acid - 25.93% Dimethylamine salt of (+)-(R)-2-(2 methyl-4-chlorophenoxy) propionic acid - 6.93% Dimethylamine salt of dicamba: 3,6-dichloro-o-anisic acid - 2.76% |
| Product Type | Herbicide |
| Formulation | Emulsifiable Concentrate (EC) |
| Application Rate | Cool-season turf, use 1.2 oz. of product per 0.5 gallons of water per 1,000 sq. ft. Acre rates cool-season turf, use 3.25 pints of product per 20 gallons of water per acre. For Bentgrass, Centipedegrass, and St. Augustine grass, apply 1 fluid ounce of product with 5 gallons of water per 1,500 square feet. |
| Shelf Life | Trimec Classic will last up to 3 years when stored properly in a cool, dry space. |
| Yield | One gallon of Trimec Classic can treat up to 520 acres. |
| Use Sites | Outdoors |
| Time to Kill | Results may be seen within several days after application with total weed die off being seen within 2 to 4 weeks. |
| Comparable Products | 3-D Herbicide, Triplet Herbicide |
| Use Caution With | Bentgrass, St Augustine |
| Incompatible Home Siding | Brick, Hardie Plank, Stone Veneer, Stucco, Wood, Vinyl |
| EPA Registration # | 2217-543 |
| Restricted Use | No |
|---|---|
| Shipping Restrictions | AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, VT, WA |
| Availability | Online |
| Signal Word | DANGER |
| Keith's Pro Tip | "Do your best to avoid applying Trimec Classic when air temperatures are over 90 degrees Fahrenheit as some injury to turf grass may be seen." |
| Target Pests Multi | Annual Fleabane, Aster, Bedstraw, Beggarticks, Bindweed, Birdsfoot Trefoil, Black Medic, Brambles, Broadleaf Plantain, Buckhorn Plantain, Bull Thistle, Buttonweed, Carolina Geranium, Carpetweed, Catsear, Chickweed, Cinquefoil, Clover, Cocklebur, Common Burdock, Common Chickweed, Common Lespedeza, Common Mallow, Compassplant, Corn Speedwell, Creeping Beggarweed, Creeping Buttercup, Creeping Jenny, Creeping Woodsorrel, Curly Dock, Dandelion, Dayflower, Deadnettle, Dock, Dollarweed, Dovefoot Geranium, Dutch Clover, English_Daisy, False Dandelion, Field Bindweed, Field Madder, Field Pennycress, Filaree, Florida Pusley, Groundsel, Hairy Bittercress, Hawkweed, Healall, Henbit, Horsenettle, Horseweed/Marestail, Jimsonweed, Knotweed, Kochia, Kudzu, Lambsquarters, Lawn Burweed, Lespedeza, Mallow, Morningglory, Mouseear Chickweed, Multiflora Rose, Nettle, Oak, Old World Diamond Flower, Oxalis, Oxeye Daisy, Parsley Piert, Pennsylvania Smartweed, Pennywort, Pepperweed, Pigweed, Pineapple_Weed, Plantain, Poison Ivy, Poison Oak, Prostrate_Knotweed, Puncture Vine, Purple Cudweed, Purslane, Ragweed, Red Sorrel, Redstem Filaree, Redweed, Roundleaf Greenbriar, Sheep Sorrel, Shepherdspurse, Speedwell, Spotted Catsear, Spotted Spurge, Sunflower, Thistle, Velvetleaf, Venice Mallow, Veronica, Virginia Buttonweed, Virginia Creeper, Western Salsify, White Clover, White Heath Aster, Whitestem Filaree, Wild Carrot, Wild Garlic, Wild Geranium, Wild Lettuce, Wild Mustard, Wild Onion, Wild Strawberry, Willow, Yarrow, Yellow Rocket, Yellow_Woodsorrel, Ash, Aspen, Birch, Black Cherry, Chicory, Dogfennel, Elm, Gooseberry, Ground Ivy, Honey Locust, Matchweed, Mustard, Shortleaf Pine, Wild Violet |
| Time to Kill | Results may be seen within several days after application with total weed die off being seen within 2 to 4 weeks. |
| Chemical Type | Herbicide |
| Formulation | Emulsifiable Concentrate (EC) |
| Application Methods | Broadcast Spray, Spot Treatment |
| Product Drawbacks | Trimec Classic may damage centipedegrass and St. Augustine grass. St. Augustine grass is especially vulnerable during spring green-up. |
| Active Ingredient | Dimethylamine salt of 2,4-dichlorophenoxyacetic acid - 25.93% Dimethylamine salt of (+)-(R)-2-(2 methyl-4-chlorophenoxy) propionic acid - 6.93% Dimethylamine salt of dicamba: 3,6-dichloro-o-anisic acid - 2.76% |
| Application Equipment | Backpack Sprayer, Gloves, Hose End Sprayer, Pump Sprayer, Respirator Mask, Spray Rig |
| Mix Rate | Cool-season turf, use 1.2 oz. of product per 0.5 gallons of water per 1,000 sq. ft. Acre rates cool-season turf, use 3.25 pints of product per 20 gallons of water per acre. For Bentgrass, Centipedegrass, and St. Augustine grass, apply 1 fluid ounce of product with 5 gallons of water per 1,500 square feet. |
| Use Sites | Outdoors |
| Yield | One gallon of Trimec Classic can treat up to 520 acres. |
| EPA Registration No. | 2217-543 |
| Shelf Life | Trimec Classic will last up to 3 years when stored properly in a cool, dry space. |
| Comparable Products | 3-D Herbicide, Triplet Herbicide |
| Children or pets? | Yes |
| Property Characteristics | None |
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