How to Use Ground Clear Weed Killer: Directions, Mixing, and Application

GroundClear comes in ready-to-use and concentrate versions, and the concentrate must be diluted at 5 fl oz per gallon of water for general weeds or 10 fl oz per gallon for tough ones.

Two bottles that both say GroundClear can demand completely different measuring cups, and mixing one by the other’s label is the fastest way to kill the lawn you meant to keep. The GroundClear family runs from a no-mix Comfort Wand bottle to a year-long vegetation killer that reacts with metal cans. Getting the version right is step one; getting the dilution right is step two. The rundown below covers the exact ratios, wand setup, and timing windows for each formula.

What Is The Correct Mixing Ratio For GroundClear Concentrate?

GroundClear Super Concentrate mixes at 5 fl oz per gallon of water for general weed control and 10 fl oz per gallon for established or hard-to-kill weeds. Ortho’s product page lists the stronger rate as 1¼ cups per gallon.

Gently shake the bottle first. Pour the concentrate into the water in a tank sprayer, never the reverse, and agitate before you start spraying.

The refill-pouch version skips the measuring cup entirely. Empty one 5-fl-oz pouch into the supplied 0.5-gallon applicator bottle, add a half gallon of water, cap it, and shake. That pouch makes 0.5 gallon and covers up to 175 square feet.

Which Sprayer Should You Use, And Which One Should You Avoid?

Use a plastic, aluminum, or stainless-steel tank sprayer for Super Concentrate, and skip the backpack sprayer — Ortho’s directions specifically say not to use one. The Year Long Vegetation Killer has stricter rules: plastic sprinkling cans or plastic tank sprayers only.

Metal is the danger with the Year Long formula. Ortho’s answers warn that the product reacts with metal, producing hydrogen gas and corroding the container. Hose-end sprayers like a Dial N Spray are also off the list for that version.

For the Year Long concentrate, mix 24 fl oz per gallon of water, and that gallon covers up to 300 square feet.

How Do You Apply GroundClear Without Wasting It Or Damaging Plants?

Spray actively growing weeds on a calm day when the air is above 60°F, wet the foliage thoroughly, and stop before the product runs off the leaves. Runoff wastes money and pushes herbicide toward roots you wanted to keep.

Timing matters as much as technique. Rain within 24 hours washes the concentrate off before it works, so check the forecast. A dry, dusty treatment area should be watered every other day for a week beforehand so weeds are actually growing and able to absorb the spray.

For the ready-to-use versions, no mixing happens at all. The Comfort Wand bottle (4613264) runs on a battery: connect the wand, pick a spray pattern, unlock the trigger, aim at the center of the weed, and lightly cover the leaves. Reapply every 2–3 weeks for new growth. The ready-to-use Super Weed and Grass Killer covers up to 350 square feet per gallon and leaves no residual barrier, so weeds that sprout later need a fresh pass.

One warning that applies to every formula: keep children and pets off the area until the spray dries. Re-entry is fine once the surface is dry.

If you would rather compare bottles before committing, this roundup of tested Ground Clear weed killer picks breaks down which formula suits driveways, fence lines, and garden beds.

How Do You Clean Up And Stay Inside The Label Limits?

Rinse the sprayer three times after use and dump the rinsate on bare soil or gravel — never on garden beds, food crops, or feed crops. Ortho’s directions are explicit that the product should not touch anything you plan to eat or keep.

Reapplication limits exist for a reason. Super Concentrate and the ready-to-use Super Weed and Grass Killer both require at least 28 days between treatments and cap you at two broadcast applications per year. The Year Long Vegetation Killer is typically a once-a-year job. Overuse does not kill weeds faster; it just risks the surrounding soil.

Full label details live on Ortho’s site: Ortho GroundClear Super Concentrate directions cover the mixing rates and sprayer rules in full.

Pick the formula first, then follow its label — not the label of the last bottle you owned. The concentrate rates, the metal-can warning, and the 60°F floor all come straight from the manufacturer, and matching them is what separates a clean kill from a dead shrub.