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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.

SOLD OUT

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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Chadillac
Verified Reviewer
Best weed killer for the lawn

I have begun using organic products expecting them to work but be less effective than chemicals. This was not the case. I was incredibly impressed by the results. Within 24hrs the weeds were gone with one application and no burns to the grass. My only disappointment was that it was sold out on the w...

Published date
07/20/25
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Sunday F.
Verified Reviewer
Great Product

Killed the weeds in just 24 hours

Published date
07/18/25
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Ashley
Verified Reviewer
A product I will be using again

I’ve been pleasantly surprised by Sunday’s weed & green. The application proved to be a little tricky, only because I couldn’t get the sprayer to work. I think the issue was how the straw was sitting in the bottle, I think it’s too long??? The treatment itself started to work within 24 hours, weeds ...

Published date
07/01/25
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Tom
Killed Lawm

I’ve been a loyal Sunday customer for years and the products have never failed me… until now. This product killed about half my lawn, and my dark green lawn is now grey and brown.

Comments by Store Owner on Review by Store Owner on Thu Jun 26 2025
Store Owner
Hi Tom, we're sorry to hear that this was your experience with Weed & Green! This shouldn't be the case with your results, and we're going to have one of our Yard Advisors reach out to you via email to get some more information and help with your lawn!
Published date
06/26/25
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Sunday F.
Verified Reviewer
I appreciate your product, works

I appreciate your product, works good

Published date
06/23/25
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Sunday F.
Verified Reviewer
Thicker and Fuller

No, I am not talking about my hair, I am talking about my lawn. I have struggled for many years to get a half way decent looking lawn that is vibrant and flush. Weed & Green has made me look like a professional. The nutrients in Weed & Green transform your yard into the envy of the neighborhood.

Published date
06/10/25
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Susan
Verified Reviewer
Greener, but more weeds have appeared

Following the directions, the product was used in my back yard & waiting 2. 5 days to write the review hoping for better results. The grass is greener; darker in some places (which is nice) but not overall. I was hoping for the weeds there were to die off by now. Instead, several have now popped and...

Published date
06/03/25
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Evan
Verified Reviewer
Needed more than expected but did see results

Took multiple applications and more bottles than expected. I did apply as the weeds were emerging. Ended up purchasing more bottles to complete the yard.

Published date
06/03/25
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Freya
Verified Reviewer
Maybe it worked?

Not sure if this worked or not. It took a few weeks for the weeds to turn brown and die, but that could have just been their lifespan. Easy to apply though.

Published date
06/01/25
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Sunday F.
Verified Reviewer
Worked great

All the dandelions are other random weeks shriveled up. Lawn is still looking great weeks later.

Published date
05/30/25
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