5 Best Post-Emergent Herbicides
5 Best Post-Emergent Herbicides
5 (100%) 3 vote[s]
Southern Ag Amine 2,4
Southern Ag Amine 24-D Weed Killer
Item Weight: 2.5 pounds
Size: 1 Quart
Controls broadleaf weeds
Dow AgroSciences
Dow AgroSciences RTU548 Tordon RTU Herbicide QT Size
Effective
Superior Results
Easy-to-use
PBI/Gordon 652400
PBI/Gordon 652400 Speed Zone Lawn Weed Killer, 20-Ounce
Visible results in hours
Rapid and effective
14,000 to 18,000 s.f.
Quinclorac 75 DF
Quinclorac 75 DF Selective Herbicide Equivalent to Drive quali-1014
Quinclorac 75%
Effective Against
Use Sites
Blindside Herbicide
Blindside Herbicide WDG FMC Selective Herbicides 8 OZ bottle
Over 70 broadleaf weeds
Convenient tip
Measure package

Choose the Best Post-Emergent Herbicides

Customer’s Choice: the Best Rated Post-Emergent Herbicides

12 users answered this survey. Please help us improve this review!

58.33% of users selected Southern Ag Amine 2,4, 8.33% selected Dow AgroSciences, 8.33% selected PBI/Gordon 652400, 8.33% selected Quinclorac 75 DF and 16.67% selected Blindside Herbicide. Every month we analyze your answers and change our rating.

Post-emergent herbicides are quite popular weed killers. Such herbicides operate on weeds that have already emerged, and pre-emergent products work to discourage weeds from ever developing.

To suppress the plant to guarantee it does not develop back, they use a combination of chemicals. To help eliminate numerous varieties of weeds in different habitats, there are several types of post-emergent weed killers available.

Benefits of post-emergent products:

  • Include powerful chemical ingredients;
  • Cost-effective;
  • Results appear in a few weeks;
  • Easy to use;

Below you may check the detailed expert guide about the choice and use of the best post-emergent herbicides in the U.S. market. The comparison table contains a few useful specs of each reviewed product. 

Southern Ag Amine 2,4-D WEED KILLER – the best for broadleaf weeds!

Southern Ag Amine 24-D Weed KillerThe first selective use in this series is Southern Ag 2,4-D Amine weed killer. Being a targeted weed killer, if you have an existing lawn plagued with weeds, it’s perfect.

Lots of broadleaf weeds, from daffodils and poison ivy, to chickweed and clover, can invade and not enter the lawn. The Southern Ag herbicide would be able to eradicate it without touching your precious lawn if there’s a plant that needs to be gone.

Tips for users: Mix 2 to 3 teaspoons with 3-5 gallons of water, the container is 32 oz of concentrate. Ultimately, this will give you about 20,000 sq. ft. If you notice the weeds are always kicking after the first application, increase the concentration.

Pros

Pros
  • Good for destroying any grassy weeds;
  • Great coverage area;
  • Affordable;

Cons

Cons
  • Requires 2 weeks to act;
  • Some lawn weeds are not affected;

This herbicide can do a fine job of destroying any nasty weeds on your lawn. This product is strong and reliable. This is a professional item that you can use around your house, offering targeted weed control for application in and around pastures, rangelands, cemeteries, parks and golf courses. Just be very careful in its application and avoid drift to desirable plants.


Dow AgroSciences RTU548 Tordon RTU Herbicide– the best for year-round use!

Dow AgroSciences RTU548 Tordon RTU Herbicide QT SizeThis specialist herbicide is successful in stopping more than 20 woodland plants from sprouting again, meaning that when it comes to irritating tree stumps, as well as other shrubs and leaves, it does the job.

But although it’s low toxicity, it’s a decent performing herbicide relative to other stump killers out there. And if you have bees buzzing in your garden and are worried about the degree of toxicity in your stump killer, one of the active chemicals, as an added bonus, 2,4-D is practically non-toxic to the vulnerable community of honeybees, so you can rest happily with the beekeepers among you.

Pros

Pros
  • Cost-effective;
  • Kills the root system of trees and bushes;
  • Easy to apply;
  • Non-toxic to bees;

Cons

Cons
  • Works slowly;
  • Not suitable for mixing with wetting agents;

By translocating itself through the tree’s root structure, the remedy succeeds, avoiding any further resprouting. It is simple to use; there is no fuss in certain fields including fence lines and non-cropland areas. Also, this product is highly productive and utilized. Mixing or weighing is not required and is ideal for rapid usage.


PBI/Gordon 652400 Speed Zone Lawn Weed Killer– the best for the quick action!

PBI/Gordon 652400 Speed Zone Lawn Weed Killer, 20-OunceWhen you need to get rid of weeds already consuming a yard, Gordon’s SpeedZone lawn weed killer is a perfect alternative. In specific, over 100 distinct broadleaf weeds, including wild violet, clover, Creeping Charlie, can be destroyed by this product.

You’ll start getting results within hours as a touch herbicide and the treated weeds should be fully dead within 1 to 2 weeks. With their innovative formulation, SpeedZone has solved this issue, ensuring that this herbicide can be used in all seasons, including fall.

Pros

Pros
  • Quick results in 2 weeks;
  • 4-ingredient formula;
  • Visible results in a few hours;
  • Large coverage area;

Cons

Cons
  • Pricey;
  • Requires many applications;
  • Not suitable for all grassy lawns;

Make sure to include this post-emergent herbicide to your list when it comes to the annual weed control of your lawn. It is effective and covers a large area.


Quinclorac 75 DF Selective Herbicide– the best for the pet’s safety!

Quinclorac 75 DF Selective Herbicide Equivalent to Drive quali-1014Quinclorac 75 DF is a post-emergent, water-soluble selective herbicide that destroys resistant turf species of broadleaf weeds and grasses.

Used as a post-emergent, on industrial and suburban grounds or lawns for residences, airports, athletic fields, golf courses, military and other organizations, parks, roadsides, colleges, sod farms, this crabgrass killer herbicide manages certain broad-leaf and grass weeds in turf grasses.

The foliage and the roots of the affected weeds consume and translocate the Quinclorac 75 DF product. Treated weeds will exhibit symptoms of curling or twisting of leaves and roots, stunting, changing of color from green to white, then to red, until dying at last.

Pros

Pros
  • Powerful formula;
  • Pet-friendly;
  • Water-soluble;
  • Wide application;

Cons

Cons
  • Not allowed in some U.S. states;
  • Needs a few weeks to act;
  • Won’t cope with Bermuda or dandelions;

In a large range of turf species, from residential and industrial to golf courses, sod farms and sports fields, this efficient herbicide can kill both broad-leaf and grassy weeds.


Blindside Herbicide WDG FMC Selective Herbicides– the best for the coverage area!

Blindside Herbicide WDG FMC Selective Herbicides 8 OZ bottleThis Blindside herbicide includes powerful components as Sulfentrazone and Metsulfuron-methyl. Finally, for daunting post-emergence weeds, there is a fast-acting, extremely efficient approach that can be applied to nearly all forms of warm-season turfgrass, including St. Augustine grass.

Via both foliar and root absorption, dual-action Blindside Herbicide acts to have quicker control of over 70 broadleaf weeds and sedges. In fact, within only a week, Blindside has been seen to offer noticeable indicators of control, making it dramatically quicker than current competing goods.

The herbicide’s dispersible granular formula is offered in a compact box with a dosing chamber that dispenses sufficiently herbicide correctly to handle 1,000 sq. ft. at both low and moderate application speeds.

Pros

Pros
  • Can cope with 70 broadleaf sedges and weeds;
  • The first results appear in a week;
  • Safe application on grassy lawns;
  • A convenient package with a dosing chamber;

Cons

Cons
  • Won’t cope with seashore paspalum;
  • A bit pricey;

For tough broadleaf weeds and sedges, Blindside provides homeowners as well as specialists with the ultimate performance in pace, versatility, and effectiveness. Furthermore, it is highly specific and licensed for most hot/cool-season turfgrasses for use.


The Buyer’s Guide

Types

Post-emergent formulas come with either contact or systemic application. Systemic products are most beneficial when they are immediately ingested into the plant and travel across it for optimum destroying action on perennial weeds. Contact weed killers are used on annuals and smaller weeds, destroying the uncovered portion of the vine. This might seem to be negligible, but the death of the leaves is sufficient to destroy the whole plant in most weeds.

In comparison, post-emergent herbicides are graded as non-selective and selective products. To target such weeds and in places such as turf where interaction with the grass is inevitable, selective herbicides are used. In free, unmanaged areas, for example, non-selective herbicides are used for extensive weed control and have a function.

Major types:

  • Granular products. Granular herbicides can give a deadly dose to tough weeds like Creeping Charlie, wild violet, and most cool-season perennials. They come in tiny rock-shaped particles and are suitable as a defensive shield for weeds that grow a dense canopy layer;
  • Liquid products. Liquid weed killers have a greater penetration of the leaves and typically knock the whole plant down within a week or two if you can administer the proper dosage at the right time to the right plant. The solvent concentration needs to be combined with liquids, which offers you more power over the dosage intensity;

Climate conditions

The main barriers to plant development, and thus the absorption of herbicides, are high temperatures and low humidity. Post-emergent weed killers, particularly the systemic kind, only function when the weeds are growing strongly, as I repeatedly explained during this article.

The diffusion from the stems to the roots takes place within the vascular system of the plant. The plant is placed under severe stress when the atmosphere is too hot or cold and dry, which allows the leaves’ stomata to cover themselves, which slows down the rate of photosynthesis.

With this decreased photosynthesis intensity, the sugar transport from the stem to the other sections of the plants slows down, inevitably minimizing the movement of herbicides within the plant.

When the local temperature is about 55-85F, the optimal environment state for implementing a post-emergent product. The herbicide can be broken down for something below 55F, whereas temperatures over 85F can simply evaporate toxic herbicide solutions until the leaves can consume it.

This is the only explanation that the bulk of post-emergence practices function well during spring and fall. Nonetheless, note that this does not extend to all cases.

Rainproof protection

Much like many herbicides, in the face of high heat and sunshine, post-emergent formulas will not work their way through the system, many herbicides need at least 8 hours of rain-free time to penetrate the plant system.

Look for a rain-fast herbicide that encourages quick absorption if you really have to spray the weeds in rainy conditions, taking just 10-15 minutes for the rainproof protection to get the job done.

Perhaps the most noticeable distinction between a pre-and post-emergent herbicide is linked to how long it persists in the soil, aside from the timing of delivery.

It’s not necessarily the case, but a pre-emergent herbicide can usually last a few weeks/months better than a post-emergent herbicide.

Although post-emergent herbicides remain and have long residual periods in the soil, they do not stick around for the most part. This is such that after a few days of submission, you will be free to plant attractive vegetation and flowers.

Apart from that, pre-emergent products need the activation of water, while post-emergent herbicides, if washed off their target plants, would not be successful.

Coverage area

You may use a spot application with a trigger or herb wand whether you’re handling one or two weeds. It is possible that this herbicide would come in a ready-to-use container.

A hose applicator or tank/compression sprayer may be named for larger environments. A herbicide that is administered in this manner also comes as a concentrate and involves water dilution.

A surfactant, which is an additional liquid applied to help break the surface friction between the weed killer and the target, could be needed. Surfactants allow the herbicide to move deeper and be more easily absorbed.

Try to buy the volume that you realize you’re going to need anyway. Herbicides have a shelf-life, and if excess to specifications, may become ineffective and inefficient.

Video Tutorial: Review: PBI/Gordon 652400 Speed Zone Lawn Weed Killer

Final thoughts 

Topical, selective herbicides may be handled for certain plants, while some persistent species only give in to selective/non-selective systemic herbicides. Then what will that be? Think about it, know your opponent, and choose your weapon accordingly. Hopefully, these post-emergent herbicides can assist you in your battle against different plants and weeds. 


Hello, my name is Jane Smith and I’m an author of this blog. Using weed killer seems inevitable, especially when highly recommended organic options fail to get rid of weeds.

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