4.3 out of 5 Customer Rating
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Ortho® Weed B-Gon™ Lawn Weed Killer Ready-To-Use Refill

4.3 out of 5 Customer Rating
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Ortho® Weed B-Gon™ Lawn Weed Killer Ready-To-Use Refill



  • Kills dandelions, clover and other broadleaf weeds
  • Won’t harm the lawn (when used as directed)
  • Kills 250+ listed weeds (see label for listed weeds)
  • Results in hours
  • Kills weeds to the root

Specs and Details

Active Ingredients

  • 0.605% Dimethylamine Salt of 2,4-D Acid, 0.149% Dimethylamine Salt of Mecoprop-p Acid, 0.026% Dicamba Acid


  • Prolonged or repeated skin contact may cause an allergic reaction in some individuals.
  • Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, or using tobacco.

Disposal Methods

  • The container is nonrefillable. Do not reuse or refill.
  • If empty: Place in trash or offer for recycling if available. The Comfort Wand can be reused with another Ortho® Weed B-gon™ Lawn Weed Killer Ready-To-Use with Comfort Wand® refill bottle.
  • If partly filled: Call your local solid waste agency for disposal instructions. Neverplace unused product down any indoor or outdoor drain.
Product Label
  • This is not the product label. Always read and follow the product label before use.
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Ortho® Weed B-gon™ Lawn Weed Killer Ready-To-Use kills weeds to the roots. With the convenient trigger applicator, you can kill over 250+ weeds* for easy and effective spot treatment without damaging your lawn. Ortho® Weed B-gon™ is specially designed for Northern and Southern lawns. You'll see results in hours!

*See label for listed weeds.

Step by Step Instructions

How to Use

  • Use this refill bottle with the Comfort Wand® from an empty Ortho® Weed B-gon™ Lawn Weed Killer Ready-To-Use with Comfort Wand® bottle.
  • To remove the side holster from the original bottle, pull the bottom tab underneath and slide the holster up. Attach the sprayer holster to the refill bottle by sliding it down onto the knob. Insert the hose connector into the spout on the cap until it clicks into place.
  • Twist knob to “ON.” Set your desired spray pattern, then slide the trigger switch to “Unlock.”
  • Press the trigger to spray. Aim at the center of the weed and spray to lightly cover the leaves of the weeds.
  • When you have treated all of the weeds, turn the sprayer nozzle to “OFF," slide the trigger switch to “Lock," and twist the knob to “OFF.”
  • Fold wand closed and place sprayer into the holster. Now you can store the bottle in a safe location until needed again.

When and Where to Use

Where Not to UseDo not use on Floratram variety of St. Augustinegrass, Bentgrass, Carpetgrass, Dichondra, Lippia, Ornamental plants (flowers, trees, groundcovers, landscape beds and shrubs), Gardens (including vegetables, fruit trees, vines, and berries), Seashore Paspalum, and turfgrass species that are not listed.

  • Do not apply directly to, or near, water, storm drains, gutters, sewers, or drainage ditches.
  • Applications should not be made within 25 feet of rivers, fish ponds, lakes, streams, reservoirs, marshes, estuaries, bays, and oceans.
  • Do not spray the exposed roots of desirable plants.

Where to Use

  • Use on established, residential lawns of St. Augustinegrass (do not use on Floratam), Bermudagrass (common and hybrid), Centipedegrass, Zoysiagrass, Buffalograss, Bahiagrass, Kentucky bluegrass, Ryegrass, Tall fescue, and Fine fescue.

When to Apply

  • Applications should be made when weeds are small and actively growing in the spring or fall, when daytime temperatures are below 90°F, and the air is calm.

How Often to Apply

  • Do not exceed two applications a year with at least 30 days between applications.

Special Instructions

  • Do not apply if rain is expected within 24 hours or if it is windy.
  • If the area to be treated is newly seeded, mow 3 times before making the first application.
  • The maximum application rate is 12.8 fl. oz. per 1,000 sq. ft. per application. Do not apply more than 25.6 fl. oz. per 1,000 sq. ft. per year.
  • Keep this container from freezing. Store it in an area inaccessible to children.
  • Do not submerge the wand or container in water. When storing sprayer for long periods, remove batteries.

Watering Tips

  • If the lawn is dry, water thoroughly before applying this product.
  • For maximum effectiveness, do not water the lawn for 12 hours after an application.

Frequently Asked Questions

Weeds Controlled

Alder, Annual yellow sweet clover, Artichoke, Aster, Austrian fieldcress, Bedstraw, Beggartick, Biden, Bindweed, Bird vetch, Bitterweed, Bitter wintercress, Black-eyed Susan, Black medic, Black mustard, Blackseed plantain, Blessed thistle, Bloodflower, Blue lettuce, Blue vervain, Box elder, Bracted plantain, Brassbuttons, Bristly oxtongue, Broadleaf dock, Broadleaf plantain, Broomweed, Buckhorn, Buckhorn plantain, Bulbous buttercup, Bull nettle, Bull thistle, Burdock, Burning nettle, Bur ragweed, Burweed, Buttercup, Canada thistle, Carolina geranium, Carpetweed, Catchweed bedstraw, Catsear, Catnip, Chickweed, Chicory, Cinquefoil, Clover. Cockle, Cocklebur, Coffeebean, Coffeeweed, Common chickweed, Common mullein, Common sowthistle, Corn chamomile, Creeping Jenny, Creeping Woodsorrel, Crimson clover, Croton, Cudweed, Curly dock, Curly indigo, Dandelion, Dead Nettle, Dock, Dogbane, Dogfennel, Dollarweed, Elderberry, English daisy, Fall dandelion, False dandelion, False flax, False sunflower, Fiddleneck, Field bindweed, Field pansy, Flea bane (Daisy), Flixweed, Florida betony, Florida pusley, Frenchweed, Galinsoga, Garlic mustard, Goathead, Goatsbeard, Goldenrod, Ground ivy, Gumweed, Hairy bittercress, Hairy fleabane, Hawkweed, Healall, Heartleaf drymary, Hedge bindweed, Hedge mustard, Hemp, Henbit Hoary cress, Hoary plantain, Hoary vervain, Honeysuckle, Hop clover, Horsenettle, Horsetail, Indiana mallow, Ironweed, Jewelweed, Jimsonweed, Kochia, Knawel, Knotweed, Lambsquarter, Lespedeza, Locoweed, Lupine, Mallow, Marshelder, Matchweed, Mexicanweed, Milk vetch, Milkweed, Mugwort, Morningglory, Mouseear chickweed, Musk thistle, Mustard, Narrowleaf plantain, Narrowleaf vetch, Nettle, Orange hawkweed, Oxalis, Oxeye daisy, Parsley-piert, Parsnip, Pearlwort, Pennycress, Pennywort, Peppergrass, Pepperweed, Pigweed, Pineywoods bedstraw, Plains coreopsis, Plantain, Poison hemlock, Poison ivy, Poison oak, Pokeweed, Poorjoe, Povertyweed, Prickly lettuce, Prickly sida, Primrose, Prostrate knotweed, Prostrate pigweed, Prostrate spurge, Prostrate vervain, Puncture vine, Purslane, Ragweed, Red clover, Redroot pigweed, Red sorrel, Redstem filaree, Rough cinquefo, Roundleafed marigold, Rush, Russian pigweed, Russian thistle, St. Johnswort, Scarlet pimpernel, Scotch thistle, Sheep sorrel, Shepherdspurse, Slender plantain, Smallflower galinsoga, Smartweed, Smooth dock, Smooth pigweed, Sneezeweed, Southern Wild Rose, Sowthistle, Spanishneedle, Spatterdock, Speedwell, Spiny amaranth, Spiny cocklebur, Spotted catsear, Spotted knapweed, Spotted spurge, Spurge, Spurweed, Stinging nettle, Stinkweed, Stichwort, Strawberry clover, Sumac, Sunflower, Sweet clover, Tall nettle, Tall vervain, Tansy mustard, Tansy ragwort, Tanweed, Tarweed, Thistle, Tick trefoil, Toadflax, Trailing crown vetch,Tumble mustard, Tumble pigweed, Tumbleweed, Velvetleaf, Venice mallow, Veronica, Vervain, Vetch, Virginia buttonweed, Virginia creeper, Virginia pepperweed, Wavyleaf bullthistle, Western clematis, Western salsify, White clover, White mustard, Wild mustard, Wild aster, Wild buckwheat, Wild carrot, Wild four-o'clock, Wild geranium, Wild lettuce, Wild marigold, Wild parsnip, Wild radish, Wild rape, Wild strawberry, Wild sweet potato, Wild vetch, Willow, Witchweed, Woolly morningglory, Woodsorrel, Woolly croton, Woolly plantain, Wormseed, Yarrow, Yellow Rocket, Yellow flower pepperweed, Yellow Woodsorrel and other broadleaf weeds.

Kids & Pets

People and pets may reenter the treated area after it has dried.

Our Environment

  • To protect the environment, do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters, or surface water. Applying in calm weather when rain is not predicted for the next 24 hours will help ensure that wind or rain does not blow or wash pesticide off the treatment area.
  • Rinsing application equipment over the treated area will help avoid run off to water bodies or drainage systems.
  • The use of this chemical in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination.
  • Application around a cistern or well may result in contamination of drinking water or groundwater.
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