9 Best Ortho Weed Killer 2025 in the United States

The Ortho GroundClear Year Long Vegetation Killer1 Concentrate is designed to target both weeds and grasses, making it a versatile choice for various types of unwanted vegetation. It is a non-selective herbicide, meaning it will kill most plants it comes into contact with, so it is best used in areas where no plant growth is desired, such as driveways, sidewalks, and gravel areas. The product is easy to apply using a tank hose sprayer, which ensures even coverage and efficient use of the concentrate.

The instructions recommend mixing 24 fl. oz. of concentrate per gallon of water, and a single gallon of concentrate can treat up to 1,600 square feet, making it suitable for large areas. One of the key strengths of this product is its long-lasting effect, with the ability to prevent regrowth for up to a year. This makes it a convenient option for users who do not want to deal with frequent reapplications.

Additionally, it starts working immediately and kills weeds down to the root, ensuring thorough elimination. However, users should be aware that as a non-selective herbicide, it can harm desirable plants if they are accidentally sprayed. Also, its efficacy might be influenced by weather conditions, and it is not specifically indicated how rainfast it is. Safety for pets and children is another consideration; while the product does not specify particular safety measures, it is generally advisable to keep treated areas off-limits to pets and children until the product has dried and been fully absorbed.

The Ortho GroundClear Weed & Grass Killer is a versatile and effective product for eliminating a wide range of weeds and grasses, including dandelions, chickweed, crabgrass, and moss. It is designed for use on patios, landscapes, walkways, and driveways, but not on lawns where you have desirable grass. The included Comfort Wand makes application easy and precise, ensuring you can target specific weeds without affecting nearby plants you want to keep.

One of the standout features is its fast action; you can see visible results within 15 minutes, and it's rainproof after just 2 hours of drying, making it convenient for varied weather conditions. However, users should apply it when weeds are small and actively growing for the best results, and it should not be used when the weeds are wet from rain or irrigation. The product is also OMRI Listed, indicating it meets organic standards, which is a plus for environmentally conscious users.

On the downside, this weed killer is non-selective, meaning it will kill any plant it comes into contact with, so careful application is necessary. Additionally, while effective, it may not offer the prolonged residual activity some users might prefer, requiring reapplication throughout the growing season. As for safety, it is generally regarded as safe for use around pets and children once dried, but caution is always advised during application. This product is ideal for homeowners looking for a quick, easy, and effective solution to weed control in non-lawn areas.

Ortho GroundClear Weed & Grass Killer Super Concentrate is designed to tackle tough weeds and grasses with a fast-acting formula that works on contact and moves down to the roots for a thorough kill. Weeds start to wilt within hours and die completely in 1 to 2 weeks, providing quick results. It becomes rainfast just 15 minutes after application, so you don’t have to worry about losing effectiveness if it rains shortly after you spray. This product is a concentrate, meaning you need to mix it properly before use, which adds a small step compared to ready-to-use sprays.

It’s suitable for various outdoor areas like patios, walkways, and driveways, but since it kills on contact and targets roots, it’s non-selective and will harm any plants it touches, so be careful around flowers or grass you want to keep. The product should be applied when weeds are actively growing and temperatures are above 60°F for best results. Covering up to 2240 square feet per bottle, it offers good coverage for medium-sized areas.

This weed killer is effective for quickly eliminating unwanted weeds and grasses but requires careful handling and precise application to avoid damage to desirable plants and ensure safety.