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Meso 4SC Select Herbicide

MESO 4 SC Select is a professional 40% mesotrione herbicide for selective pre- and post-emergent weed control in labeled turf. It is a strong choice for lawn renovation, overseeding, and controlling tough weeds like crabgrass, nimblewill, clover, chickweed, and other labeled weeds.

Great for seeding and renovation
Controls tough labeled weeds
Professional Tenacity alternative

$49.99

Timing: Apply before or during seeding, at overseeding, or when labeled weeds are young and actively growing.

Bottle (8 oz) — covers up to 66,000 sq ft

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MESO 4 SC Select Herbicide is a professional-grade selective herbicide powered by 40% mesotrione, the same active ingredient known for controlling tough weeds while also being safe for use at seeding on many labeled turfgrasses.

MESO 4 SC can be used as both a pre-emergent and post-emergent herbicide to help control weeds such as crabgrass, nimblewill, clover, chickweed, bentgrass, and other labeled weeds. It is especially useful during lawn renovation because it can help suppress weeds while new grass seed is establishing.

When used post-emergence, MESO 4 SC is absorbed through the foliage and causes susceptible weeds to stop growing. Treated weeds often turn white before declining, which is a normal sign of mesotrione activity. For best results, apply to young, actively growing weeds and follow the label for turf type, rate, timing, and repeat applications.

MESO 4 SC is ideal for homeowners and professionals looking for selective weed control in cool-season lawns, new seedings, overseeding projects, and turf renovation programs.

NOTE: Temporary whitening of turf or weeds can occur, usually around 5–7 days after application, and may last for several weeks.

Details

Key	Value
Active Ingredient	Mesotrione 40.0%
Lawn Types	Tall fescue, Kentucky bluegrass, Centipede, Ryegrass, St. augustine
Application Rate	0.12–0.18 fl oz per 1,000 sq ft. Mixing example: For 1,000 sq ft, mix approximately 0.12–0.18 fl oz of MESO 4 SC in enough water to evenly cover the area. Use included precise syringe for measurment.
Brand	Prime Source

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Frequently Asked?

What is MESO 4 SC used for?

MESO 4 SC is used for selective pre- and post-emergent weed control in labeled turfgrass areas. Mostly for lawn renovations and new lawn installations.

Is MESO 4 SC the same active ingredient as Tenacity?

Yes. MESO 4 SC contains mesotrione, the same active ingredient commonly associated with Tenacity-style weed control.

Can I use MESO 4 SC when seeding grass?

Yes, MESO 4 SC is commonly used during seeding or lawn renovation on labeled turfgrasses. It helps by preventing new weeds from germinating while new seed is beginning to establish.

Does MESO 4 SC kill crabgrass?

MESO 4 SC can control crabgrass when applied according to the label. It works best on young crabgrass and will require repeat applications for stronger post-emergent control.

Why are my weeds turning white after spraying?

Whitening is a normal effect of mesotrione. Susceptible weeds lose chlorophyll, turn white, stop growing, and then decline over time.

How long does MESO 4 SC take to work?

Visible whitening may appear within about a week, but complete control can take up to three weeks depending on weed size, weather, and application timing.

Do I need a surfactant with MESO 4 SC?

For post-emergent applications, the label recommends adding a non-ionic surfactant.

Can MESO 4 SC be used as a pre-emergent?

Yes, it has pre-emergent activity, but dry conditions can reduce performance. The label notes that irrigation or rainfall may be needed to activate it after application.

Will MESO 4 SC hurt my lawn?

Temporary turf whitening can occur. Use only on labeled turfgrass species and follow the correct rate to reduce the risk of injury.