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Weed killer

The Sunday difference

An assortment of Sunday fertilizers, tools, and instruction sheets
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Sunday reusable pouch and sprayerSunday reusable pouch and sprayer

Sunday Herbicide Pouch + Sprayer

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Motorized Wand Sprayer used for pest and weed productsMotorized Wand Sprayer used for pest and weed products

Sunday Weed & Pest Wand Sprayer

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Shop weed killer for a cleaner, healthier yard

Weeds happen. Dandelions pop up overnight. Crabgrass creeps in where you least expect it. The good news? You don't need harsh chemicals or complicated routines to get rid of weeds in your yard.

Sunday's weed control products are formulated without harsh chemicals and designed to work with your lawn, not against it. Whether you're spot treating or tackling a full yard, we've got you covered.

Why choose Sunday lawn weed killer

All Sunday weed control products are formulated without harsh chemicals, so you know exactly what's going on your yard. Ready to get started? Pair your weed control routine with a healthy lawn fertilizer program for even better results.

Tips for using lawn weed killer

Timing matters when it comes to weed control. Here's how to get the best results:

  • Apply when temperatures are between 50 and 85 degrees Fahrenheit and weeds are actively growing
  • For pre-emergent control, apply in early spring before soil temperatures reach 55 degrees Fahrenheit
  • Fall is a great time to target perennial weeds like dandelions as they store energy for winter
  • Avoid applying before rain or irrigation
  • Skip days with extreme heat to protect both your lawn and product effectiveness

Follow the label directions, give it a few days, and watch those weeds fade. Once they're gone, overseed bare spots with grass seed to crowd out future weeds.

Lawn weed killer FAQs

What is the difference between an iron-based weed control and an herbicidal soap formula?

Iron-based formulas target broadleaf weeds in your lawn without harming grass. Soap-based formulas break down the outer coating of tough weeds, moss, and algae in gardens, mulched areas, and hardscapes. Choose an iron-based option for lawn weeds and an herbicidal soap for everything else.

How long does it take for a lawn weed killer to show results?

Iron-based weed control products show visible results within hours of application. Weeds will darken and curl as the formula goes to work. Full results typically appear within a few days, depending on conditions and weed type.

Can I use a lawn weed killer to control crabgrass?

Yes. Sunday's pre-emergent formula is designed to stop crabgrass before it sprouts and control broadleaf weeds that are already growing. Apply in early spring before soil temperatures reach 55 degrees Fahrenheit for the best pre-emergent results.

How soon can I reseed after applying a lawn weed killer?

With iron-based spot treatments, you can seed your lawn just one day after application. Always check the product label for specific reseeding timelines, as they vary by product and formula type.

What temperature is best for applying lawn weed killer?

Apply when temperatures are between 50 and 85 degrees Fahrenheit and weeds are actively growing. Avoid applying before rain or watering, and skip days with extreme heat. This protects your lawn and helps the product work effectively.

Not sure where to start? Build a custom lawn plan tailored to your yard.