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

Name: Weed & Green Pre-emergent and Post-Emergent Weed Killer
Brand: Sunday
SKU: SBA3116
Price: 25.00 USD
Availability: SoldOut
Rating: 4.1 (241 reviews)

$25

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

241 reviews

SOLD OUT

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

Weed & 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.

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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.

Shake well, attach sprayer to hose and turn on water
Turn nozzle to spray and apply uniformly across lawn, avoid spraying on hard surfaces to prevent staining from iron
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).

Weed & Green Safety Data Sheet

Weed & Green Label

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.

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Customer reviews

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Tom

LocationBoston, MA

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.

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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Georgina

Verified Reviewer

LocationIndiana

Emergent weed killer

It did not kill alot of weeds.

Published date

06/23/25

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Sunday F.

Verified Reviewer

LocationAberdeen nc

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

LocationChampaign IL

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

LocationEden Prairie, MN

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

LocationNewton, MA

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

LocationDurham, NC

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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Jason

Verified Reviewer

LocationSturgis, MI

Sadly didn't work for me

Unfortunately the spray doesn't appear to have worked for me.

Store Owner

We're sorry to hear that your weed control results aren't as expected! Here are some Best Practices to follow for best results. 1.) Try to apply on a sunny day. While not mandatory, sunshine will improve the efficacy and speed of our herbicides. With sunshine unfiltered by clouds, our herbicides will work even better. A rainfall within 3 hours after application can make the herbicides ineffective. Optimal temperatures for application are between 50F to 85F. 2.) Apply when the weeds look healthy. When weeds are stressed or injured, weeds release hormones to recover. These hormones make herbicides less effective. Hormones are also released if weeds are mowed; we recommend not applying on the same day you mow. 3.) Apply the leaves liberally. Our herbicides just need to make contact with the leaves to work; trying to apply to the roots won't be effective. For best results, you want the leaves soaked, but not to the point where the herbicides is dripping off the leaves. 4.) Know the age of the weed. Older and established weeds will likely require more applications. For older weeds, we recommend doing multiple applications on the same day; just let the leaves dry out in-between applications.

Published date

05/30/25

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Josh

Verified Reviewer

LocationPennsylvania

Works Well But. . .

I've used the Pre-emergent and Post-Emergent Weed Killer 3 times now and it works great. I've seen lasting results as well. However, the hose attachment has only worked correctly 1 of those times. The concentrate was only coming out of the center instead of the whole spray. The product works great, ...

Published date

05/29/25

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