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Q4^® Plus Herbicide

Name: Q4® Plus Herbicide
Brand: The Andersons Lawn
SKU: 10011046
Price: 49.88 USD
Availability: InStock

Liquid Post-Emergent Weed Control

Size: Quart (covers up to 17,700 sq. ft.)

Quart (covers up to 17,700 sq. ft.)

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Made in the USA

Overview

Controls more than 80 broadleaf and grassy weeds, including black medic, crabgrass, chickweed, clover, dandelion, goosegrass, henbit, nutsedge, spurge, thistle, wild violet and more
Contains four powerful actives quinclorac, sulfentrazone, 2,4-D, and dicamba for broad-spectrum post-emergent weed control
Ideal application times are during spring and early summer when weeds are actively growing
Safe for use on cool-season grasses and listed warm-season turf. Safe for Kentucky bluegrass, annual ryegrass, perennial ryegrass, fescus, bermuda and zoysia. Do not use on bahia, bentgrass, St. Augustine, carpetgrass, centipedegrass or dichondra
Provides rapid visible response
Allows reseeding in as little as one week for most grasses, and as a little as 14 days for Kentucky Bluegrass. Refer to the label for the complete list of grasses and their timing for reseeding after application

Documents

When To Apply

Q4® Plus Turf Herbicide should be applied when weeds are young, actively growing, and easy to control. Ideal application times are during spring and early summer when crabgrass, yellow nutsedge, and other broadleaf weeds begin to emerge. Avoid applying during drought stress or extreme heat, as this can reduce effectiveness and risk turf injury. Always check the weather forecast to ensure there’s no rain expected for at least 24 hours after application for best results.

PRO TIPS

Apply to dry turf. Make sure grass is dry before spraying to help the product stick and absorb evenly.
Avoid mowing two days before and two days after.
Water 24 hours before application and 24 hours after application.
Granular fertilizer applications can be made before application or 24 hours after application.
Do not apply when temperatures are above 90°F
For newly seeded areas: Delay application of this product to grass seedlings until after the second or third mowing, or 28 days after emergence.
Seeding after application: Wait at least one week after application before reseeding or overseeding. For Kentucky Bluegrass, wait at least 14 days after application before reseeding or overseeding.
PPE is recommended while applying (rubber/plastic boots, gloves, long pants, long sleeves, nitrile gloves, and goggles/glasses)

Pro Tips for Best Results

Watch Temperature & Moisture

Use when the grass is actively growing and not heat-stressed.

Mix & Apply on Calm Days

Apply when winds are low (less drift), so coverage is even and uptake is efficient.

Spray Evenly

Maintain steady pressure and overlap slightly to ensure uniform coverage across all turf areas.

Rinse Sprayer After Use

Always clean out your equipment after application to avoid residue or buildup that could affect future treatments.

Keep It Safe

Store in a cool, dry place.

Frequently Asked Questions

It controls crabgrass, foxtail, chickweed, clover, dandelion, yellow nutsedge, and many other listed grassy and broadleaf weeds.

It is safe for Kentucky bluegrass, annual ryegrass, perennial ryegrass, fescus, bermuda and zoysia. Do not use on bahia, bentgrass, St. Augustine, carpetgrass, centipedegrass or dichondra.

Most listed turfgrasses can be reseeded as soon as one week after applying Q4® Plus.

Delay mowing 2 days before and until 2 days after the application of this product. Additional stress from low mowing heights may increase the possibility of turf injury.

Do not apply this product when temperatures are above 90°F; some injury can also be expected with spot treatments when air temperatures exceed 90°F.

Delay application of this product to grass seedlings until after the second or third mowing, or 28 days after emergence.

It is recommended to apply this product with a pump/tank sprayer.

Once the spray has completely dried, pets can go back out onto the lawn.

Quintessential is most effective on crabgrass at all growth stages, while Q4 Plus will control broadleaf weeds and mature crabgrass.

Reviews

Overall rating: 4.785714 / 5 from 14 reviews.

AI Generated Review Summary

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Review highlights

Reviews

"Got this in today stocking up for Summer. Shipping was perfect."

— David (5/5)

IT WORKS!!!!!!!! I missed a

"IT WORKS!!!!!!!! I missed a few spots that I will revisit but wow this stuff is great!!! Within a few days I could see it was dying, we have never been able to get rid of our crabgrass!"

— Emily T. (5/5)

Works as needed, was delivered

"Works as needed, was delivered quickly!"

— Gary j. (5/5)

I haven’t used it yet.

"I haven’t used it yet. I purchased it for our backyard where our cavaliers and cats play. Saying that, my wife and I decided not to take a chance on the back yard due to our “grass eating pets”. I plan to use it on our front and side lawns where the pets never go. I ‘ll let you know."

— Allen F. (5/5)

5 stars

"5 stars"

— Brent R. (5/5)

Another quality product

"Another quality product"

— Danny c. (5/5)

This product I had emailed

"This product I had emailed about to kill the wild onions. This was suggested and has killed all of them within a week. I highly recommend."

— Nicholas S. (5/5)

Good stuff…

"Good stuff…"

— Starla P. (5/5)

I won't use anything else

"I had been in Sportsturf Management and High-End lawn care for 20 years and I have never found 1 herbicide this great. With this herbicide you don't need any others. Besides 1 for broadleaf weeds, 1 for grassy weeds, and 1 for nutsedge, it's all in this 1 herbicide. I would highly recommend purchasing this product."

— Dwayne S. (5/5)

Un able to use ,for

"Un able to use ,for i have St Augstine grass"

— Robert H. (5/5)

Q&A

Why did this kill my Bermuda grass? I mixed it as directed for spot treatment and tested it in a small area. It killed my grass quick but the weeds showed only slight damage. I have photos.: If your bermudagrass was killed after using Q4 Plus Herbicide, it is likely due to one or more of the following: Application during high temperatures (above 90°F) Application to stressed turf (from drought, disease, or improper mowing/fertilization) Over-application or excessive overlap Use of incompatible tank mix partners or additives Application during dormancy transition periods Feel free to ask question or contact The Andersons Customer Service Team via email: info@andersonslawn.com
Can this product be use on seedling Bermuda grass?: For newly seeded areas: Delay application of this product to grass seedlings until after the second or third mowing, or 28 days after emergence. Seeding after application: Wait at least one week after application before reseeding or overseeding.
What is the ratio for mixing q4 plus: SPOT TREATMENTS: Cool-Season Turf: Mix 2.6 to 3.0 fl. oz. of this product with 1.0 gallons of water for treatment of approximately 1,000 sq. ft. of turfgrass. Warm-Season: Mix 1.84 to 2.57 fl. oz.. of this product with 1.0 gallons of water for treatment of approximately 1,000 sq. ft. of turfgrass. See specific Bermudagrass and zoysiagrass directions in Table 3 of the label.
Is it safe for dogs: Once the spray has completely dried, pets can go back out onto the lawn.
Will Q4 herbicide kill bahia grass? I've been trying to rid my bermuda lawn of the bahia, would this do the job?: Hi there, both Quintessential and Q4 Plus do not recommend application on bahiagrass as it is susceptible to the products. We suggest testing them in a small area of your lawn to see if you get the results you are looking for.

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