Ortho GroundClear Weed Killer

Last updated date: April 20, 2022

DWYM Score

9.5

Ortho GroundClear Weed Killer

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We looked at the top Weed Killers and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Weed Killer you should buy.

Update as April 20, 2022:
Checkout The Best Weed Killers for a detailed review of all the top weed killers.

Overall Take

Ortho GroundClear Concentrate is the industry standard for effective weed killing; a single application or the fast-acting formula prevents regrowth for as long as a year. It can get rid of the most stubborn, ugly weeds.


In our analysis of 40 expert reviews, the Ortho GroundClear Weed Killer placed 1st when we looked at the top 10 products in the category. For the full ranking, see below.

From The Manufacturer

Ortho GroundClear Year Long Vegetation Killer1 is formulated to kill weeds and grasses and prevent new growth for up to 1 year. To use this concentrate, simply mix 24 fl. oz. with 1 gallon of water in a tank sprayer. Use on areas where weeds are not desired, including driveways, sidewalks, gravel areas, rock and desert landscapes, under decks, on parking areas, along fences and curbs, and in unplanted areas. The fast-acting formula should be applied to actively growing weeds. You’ll see visible results in 3 hours with Ortho GroundClear Year Long Vegetation Killer1. Mix 24 fl. oz. with 1 gallon of water to cover up to 300 sq. ft. Each bottle creates 5. 3 gallons of ready to use vegetation killer that can cover up to 1600 sq. ft.

Expert Reviews

User Summarized Score

8.8
5,877 user reviews

What experts liked

Does a good job of killing weeds
- Everything Backyard
If you use Ortho Ground Clear, you will see the results in just a few hours.
- Bumper Crop Times
It dries quickly after application, and the chemical smell will disperse after 20 minutes.
- Rural Living
This spray starts working immediately on all types of weeds and grasses.
- This Old House

What experts didn't like

Will kill grass also
- Everything Backyard
The only downside (and distinction) of the Ground Clear products is that they contain imazapyr, which destroys plants’ roots. Therefore, if you use them where other (beneficial) plants thrive, the herbicide will easily destroy them as well.
- Bumper Crop Times
On average, homeowners noticed the weed killer worked for a maximum of six months.
- Rural Living

An Overview On Weed Killers

Also known as herbicides, weed killers are chemicals applied to control and eliminate unwanted vegetation like weeds and crabgrass. They can inhibit a weed’s cell division or photosynthesis and disrupt its amino acid production.

Other weed killers mimic natural plant growth hormones and cause deformities. You can spray them onto foliage or soils, and one of the best-known weed killer chemicals is glyphosate. This chemical is an amino acid disrupter with a broad spectrum and low toxicity to animals.

Chemical-based weed killers are more common, but natural herbicides can also work pretty well. Some contain citrus oil and vinegar, which causes weeds to dry out, curl up and die. These are good for people who have pets and small children, but the chemical counterparts can be just as safe when applied according to the label directions. The best ones work in 24 hours or less, so it’s best to keep everyone away from the area for the time specified on the product label.

Some retailers sell liquid herbicides in smaller, ready-to-use containers or in concentrate form; these methods can be cost-saving. You must apply granular weed control products with spreaders, which is easy to do if you need to cover a whole lawn.

Pre-emergent weed killers are not referred to as herbicides; they are weed preventers and attack sprouting weed seedlings before they emerge from the ground. You’ll want to use these in the spring and fall. Herbicides, which are known as post-emergent weed killers, control existing weeds instead.

The Weed Killer Buying Guide

  • Weedkiller and preventer granules can be combined with dry fertilizer and spread simultaneously. This method is an excellent way to kill two birds (and many weeds) with one stone.
  • Be careful with broad-spectrum weed killers because they are non-selective and may kill desirable plants and grasses. The labels usually specify which weeds the products work on.
  • If you are overrun with a tough weed like nutsedge, choose a selective weed killer that lists the particular one on the label.
  • Herbicides don’t have expiration dates and can last for up to five years. Shake well before using and follow the label directions carefully.
  • Keep the weed container lid on tightly and away from high heat, sunlight, children and pets.