Best Monterey Weed Killers in 2026

Glyphosate 73.3%, Diquat 2.9%

Roundup QuickPro Herbicide is for use anywhere there is undesirable vegetation. Extra care should be taken to ensure that non-target vegetation is protected from any drift.

The mix rate for Roundup QuikPro is 1.5 ounces per gallon of water.

Temporary formulation - will not permanently stain treated surfaces

Non toxic to people, animals and the local environment

Can be used inside and outside the home

Product 1: Eliminates weeds at seedlings so new grass can flourish.

Product 1: Brand name: Syngenta

Product 1: Made in United States

Post-emergent control - thistledown is a full-strength herbicide based on the active ingredient clopyralid, and is designed to control actively growing broadleaf weeds and thistle in a range, pasture, and other non-crop areas.

Weed Killer - weeds controlled by thistledown include Canada thistle, musk thistle, star thistle, and knapweed. It can also be used to control kudzu, dandelion, and Oxalis.

Avoid ornamentals and vegetables - most vegetable plants and ornamentals are susceptible, so be wary of where you are using the product. Do not apply thistledown on ditches containing irrigation water.

Disease control - Liqui-cop, copper-count-n, is designed to prevent a wide variety of plant diseases including anthracnose, brown rot, blight, downy mildew, powdery mildew, botrytis blight, leaf spot and many more.

Complete protection - Our fungicide is perfect for use on fruit trees, nut crops, citrus, vegetables and ornamentals. Don't just concentrate on some of your plants. Protect your entire garden.

Long-lasting coverage - once applied and allowed to dry on the plants or trees, Liqui-cop is extremely hard to wash off. The gel formulation is intended to prevent water from washing it off.

Kill weeds in your lawn, including dandelion, chickweed, clover, crabgrass, and foxtail with the Ortho WeedClear Lawn Weed Killer

Fast-acting, with results in one application

Kills weeds to the roots but won't harm the lawn (when used as directed)

Not For Sale to AZ, OR, WA, NM, MT, ID, WY, NV, AK,HI

Provides post-emergent control of tough-to-control weeds

Weeds controlled include crabgrass (pre- and post-emergent), ground ivy, yellow foxtail, yellow nutsedge and dandelion

Broadleaf weed control - weed whacker controls over 140 types of weed including dandelions, Oxalis, poison oak, spurge, Rush, Clover, aster and thistle. Consider these hard-to-control weeds as good as gone.

Warm & cool season turf - our three-way herbicide is designed for use on Ornamental lawns and turf. It's safe to use on Bluegrass, Fescue, Rye, St. Augustine, Bahia, Common Bermuda, Centipede, Zoysia and bent.

Year round use - weed whacker herbicide can be used all year long. It works best when weeds are young and actively growing. You should only use weed whacker twice per year in the same area.

Pre-emergent herbicide - vegetable and ornamental weeder is designed for the control of annual grasses and broadleaf weeds in ornamental trees, Ornamental woody shrubs, Ornamental groundcovers, roses, established flowers, and vegetable gardens.

Seed control - this product controls weeds by killing Their seeds as they germinate, so it helps to prevent weeds from establishing. Soon, the weeds will be gone from your garden before they appear. However, it does not control established weeds.

Easy application - apply vegetable and ornamental weed Killer to the soil surface, and then water in. This is one of the few weed killers that can be used in vegetable gardens.

Product 1: Tenacity is a systemic pre-emergence and post-emergence herbicide for the selective contact and residual control of weeds in turfgrasses.

Product 1: When applied as a pre-emergent, weeds absorb Tenacity during emergence from the soil.

Product 1: Target pests: Barnyardgrass, Carpetweed, Chickweed, Clover, Crabgrass (large & smooth), Dandelion, Foxtail, Goosegrass, Henbit, Yellow Nutsedge, Purslane, Thistle, Wild Carrot and others