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Weed & Green Pre-emergent and Post-Emergent Weed Killer

$25

Weight: 32 oz. concentrate Coverage: Treats up to 1,250 sq. ft.

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Weed & Green Pre-emergent and Post-Emergent Weed KillerWeed & Green Pre-Emergent Weed ControlImage of a man spraying Weed & GreenBack of package for Weed & GreenWeed & Green Pre-emergent and Post-Emergent Weed Killer data sheetWeed & Green Pre-emergent and Post-Emergent Weed Killer data sheetWeed & Green Pre-emergent and Post-Emergent Weed Killer data sheet

Pre-emergent and post-emergent weed killer

Hose-on weed control for lawns that prevents and eliminates weeds while greening your grass blades with iron-nutrient formula.

$25

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Weed & Green Pre-emergent and Post-Emergent Weed KillerWeed & Green Pre-Emergent Weed ControlImage of a man spraying Weed & GreenBack of package for Weed & GreenWeed & Green Pre-emergent and Post-Emergent Weed Killer data sheetWeed & Green Pre-emergent and Post-Emergent Weed Killer data sheetWeed & Green Pre-emergent and Post-Emergent Weed Killer data sheet

Kill weeds, not your lawn

Weed & Green prevents and eliminates weeds while giving you a greener, thicker lawn.

Our dual-action pre-emergent and post-emergent weed control makes eliminating weeds as easy as watering your lawn. Its powerful iron (FeHEDTA) formula quickly greens up your lawn while preventing crabgrass and broadleaf weeds like dandelions from germinating in early spring. It continues to control weeds in your lawn from spring through fall, leaving it healthier and more vibrant than before.

Effective as a pre-emergent against crabgrass and as a pre- and post-emergent on broadleaf weeds like black medic, plantain, thistle, chickweed, creeping buttercup, creeping charlie, dandelion, geranium sp., English daisy, false dandelion, healall, oxalis, speedwell sp/, knotweed, shepherd’s-purse, silverweed cinquefoil, white clover, wild chamomile, as well as moss, liverworts, algae and lichens. It can also control or suppress lawn diseases: dollar spot, rust and/or snow mold.

At Sunday, we create lawn solutions without harsh chemicals—so you can return to enjoying your lawn faster.

Product Features:

  • Preemergent and postemergent
  • Lawn-safe iron formula
  • Prevents crabgrass and broadleaf weeds
  • Controls active weeds, moss, algae and lichen
  • Suppresses lawn disease like snow mold
  • Greens up lawn quickly
  • Easy hose-on application
  • Treats up to 1,250 sq. ft.

Ingredients:

Iron HEDTA (FeHEDTA): High concentration of chelated iron* prevents, controls and suppresses weeds, disease, moss, algae, lichens in lawns.

*Iron may cause temporary discoloration of dormant grass or staining - spray carefully

Instructions:

For best results, follow the product label and treat weeds early spring through fall.

  1. Shake well, attach sprayer to hose and turn on water
  2. Turn nozzle to spray and apply uniformly across lawn, avoid spraying on hard surfaces to prevent staining from iron
  3. Allow lawn to dry fully before returning to use. Wait 24 hours before seeding lawn or applying fertilizer

Application Guidelines:

Pre-emergent use: Apply every 3-6 weeks, up to 2 times per year

Post-emergent use: Apply every 3-4 weeks, up to 4 times per year

Helpful Tips from Yard Advisors:

How does Weed & Green work?

Grass and weeds absorb iron differently. Weeds quickly take in too much iron, which becomes toxic and kills them. Grass absorbs iron more slowly and can tolerate higher amounts. This difference allows us to target weeds effectively and safely while giving your lawn a healthy, deeper green color.

What weeds can I use Weed & Green on?

Weed & Green can be used as a pre-emergent for crabgrass and broadleaf weeds, and as post-emergent for broadleaf weeds, moss, algae, and lichen. It will help to suppress lawn diseases* including dollar spot, rust and snow mold.

*Not for use in California

While it’s effective as a pre-emergent on crabgrass, it won’t control existing crabgrass.

Will this preemergent cause discoloration to dormant lawns?

Weed and Green can be applied before or after weeds begin to emerge. This might mean you’re applying to a dormant lawn - or grass that’s not yet green and actively growing. If your lawn is dormant, Weed & Green may cause temporary discoloration of grass. But don't worry! Any grayish or brown color is temporary, and grass will return to its natural green as it grows.

What’s pre-emergent herbicide? What’s post-emergent herbicide?

A pre-emergent weed killer is designed to prevent weeds from sprouting above ground and works by targeting weeds as they germinate underground.

A post-emergent weed control controls weeds and other plants after they emerge from the soil.

Is there a difference between pre-emergent and post-emergent applications for Weed & Green?

Yes! Temperature and application frequency matter.

  • For pre-emergent control: Apply when soil temps reach 50-55 degrees F, and reapply 3-6 weeks later up to 2 times per year in the same area.
  • For post-emergent control: Apply anytime from spring through fall, and repeat treatment every 3-4 weeks up to 4 times per year in the same area.

Are there any US states where this is not approved for use?

Approved in all states, except CA (pending).

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Bottle of Weed & Green Hose-end Sprayer for Lawns on green lawn

Weed & Green Pre-emergent & Post-Emergent Instructions

Get step-by-step instructions for applying Weed & Green, your selective pre-emergent and post-emergent weed solution. Our lawn-safe iron formula stops weeds before they start and naturally greens up your grass.

Read article

Customer reviews

Based on 225 reviews!
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Kelly
Verified Reviewer
Good product

We have generally very few weeds in our yard because of previous products, but this season continues the trend!

Published date
05/27/25
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Evan
Verified Buyer
Expectations too high?

We still have weeds. The lawn got a little greener. But I also applied Grass Powerhouse around the same time (but not too close, as advised by Sunday). So I'm honestly not sure whether Weed & Green did anything.

Published date
05/27/25
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Greg
Verified Buyer
Great Product

Helped get rid of the weeds in my lawn

Published date
05/27/25
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Brian
Verified Buyer
Weed & Green

It worked ok. I'll apply again this fall.

Published date
05/26/25
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JR
Verified Buyer
Awesome!

Awesome product! Yard looks best it ever has!

Published date
05/26/25
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Kevin P.
Verified Buyer
Woe is for the weeds

I'm a fan of anything that's better for the environment. I've applied this twice and have noted good results thus far, particularly with plantain, dandelion, and creeping Charlie. Pro tip: spray the intended area at a distance to ensure good mixing of the product.

Published date
05/26/25
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Julie
Verified Buyer
It stopped it!

I'm new to Sunday. I wanted to try this product to see if it would stop the crab grass from emerging. And Yes, it did! On the grass where my lawn is established it seemed to keep the weeds down with the exception of a few dandelions. I choose dandelion doom for a few random weeds. The products work!

Published date
05/26/25
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Stefan
Verified Buyer
Weed killer

It works great it killed the weeds without any harm to the grass

Published date
05/26/25
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Jen
Verified Buyer
Most of our yard was crabgrass

Most of our yard was dandelions & crabgrass. We know have more grass than weeds. I should have seeded a few days after spraying weed & green. Listening to the instructions and waiting a week was a mistake. We will definitely purchase again and be smarter about filling in the gaps weed & green leaves...

Published date
05/25/25
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Nathan
Verified Buyer
Works well

Killed posion ivy in our back yard in a few hours. Also worked on a lot of chickweed in our front yard, but some is growing back after a month or so.

Published date
05/25/25
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