Filters:

  • All
  • Herbicides
  • Post-Emergent
  • Warm Season Grass
  • Weed Control
  • Filters
  • Show All Products
  • Granular Fertilizer
  • Herbicides
  • Mothership Not Connected
  • Pre-Emergent
  • Prodiamine
  • Weed Control
  • Yard Mastery
  • Insecticide
  • Syngenta
  • Syngenta Granular
  • Plant Growth Regulator
  • Liquid Fertilizer
  • Mothership Connected
  • Cool Season Grass
  • Post-Emergent
  • Warm Season Grass
  • Bio-Stimulants
  • Lawn Carbon
  • Mirimichi Green
  • Fungicide
  • Backpack Sprayer
  • Lebanon Turf
  • The Andersons
  • Lawn Care Training
  • Mothership Partially Connected
  • Soil Test
  • Organic

Post-emergent weed killers are specialized products designed to target and eliminate weeds that have already germinated and emerged from the soil. These herbicides are crucial for maintaining healthy, weed-free lawns, gardens, and agricultural areas. They work by selectively targeting weeds without harming desired plants, making them an essential tool for both home gardeners and professional landscapers.

Celsius Bottle and Single Use Packet
Celsius WG Broadleaf and Grassy Weed Control for Warm Season Turf
  • $24.99
  • $21.97
Certainty on lawn
Certainty Herbicide - 1.25 oz -Sedge and Poa Annua Control
  • $140.99
  • $134.99
Recognition Herbicide - Broadleaf and Sedge Weed Control for Warm Season Turf
  • $79.99
  • $74.99
fusilade 2 herbicide
Fusilade II Herbicide - Annual and Grassy Weed Control
  • $49.99
  • $44.99
Tenacity on lawn
Tenacity Herbicide - Weed Control for Cool Season Turf
  • $89.99
  • $84.99
Sedgehammer on lawn
Sedgehammer® Herbicide - Nutsedge Weed Killer
  • $84.99
  • $79.99
Velocity PM on Lawn
Velocity® PM - Poa Annua Control for Cool Season Turf
  • $599.99
  • $589.50
Drive XLR8 Herbicide - Quinclorac Crabgrass Control
  • $89.99
  • $78.99
Spreader sticker on lawn
Hi-Yield Spreader Sticker Non-Ionic Surfactant - 16 oz
  • $24.99
  • $21.99
mirimichi green organic weed control 2.5 gallon jug on lawn
Organic Weed Control - Concentrate
  • $159.99
  • $149.99
Weed spray Ready to use spray bottle
Organic Weed Killer - Ready to Use Spray
  • $34.99
  • $29.99
Broadleaf Weed Control - Triad Select 3-Way Herbicide
  • $49.99
  • $44.99

Sold out

Quinclorac and measuring cup on lawn
Quinclorac 75 DF Herbicide - Crabgrass Control
  • $73.99
Roundup QuickPro on Grass
Roundup QuikPRO Herbicide - Single Use Packs
  • $44.99
  • $39.99
Dimension on Lawn
Dimension .15% Pre-Emergent Herbicide with Fertilizer 0-0-7
  • $84.99
  • $79.99
HALO Select™ - Halsulfuron (Brand Alternative - SedgeHammer)
HALO Select - Halsulfuron Nutsedge Weed Killer
  • $29.99
  • $24.99

How Post-emergent Weed Killers Work

Post-emergent weed killers are typically formulated to disrupt specific physiological processes in the weeds. They may inhibit photosynthesis, disrupt cell division, or impede other vital functions, ultimately leading to the weed's death. These products are generally divided into two categories: systemic and contact herbicides.

  • Systemic herbicides: These are absorbed by the plant and move throughout its tissues, attacking the weed from within. This method ensures that the entire plant, including the root system, is eradicated, preventing regrowth. Systemic herbicides are particularly effective against perennial weeds, which can be challenging to control due to their deep root systems.
  • Contact herbicides: These act on the part of the weed they come into contact with, usually causing damage to the leaves and stems. While effective at quickly controlling annual weeds, they may not completely eliminate perennials unless repeated applications are made.

Choosing the Right Post-emergent Herbicides

Selecting the appropriate post-emergent weed killer depends on several factors, including the type of weeds present, the type of plants you want to protect, and the specific area being treated. For instance, if you are looking for a post-emergent crabgrass killer to tackle your whole lawn, Quinclorac 75 DF is the best post-emergent herbicide for you.

Here are some other considerations:

  • Selective vs. non-selective: Selective herbicides target specific types of weeds, such as broadleaf weeds or grasses, while non-selective herbicides will kill any vegetation they contact. Careful application is crucial with non-selective herbicides to avoid damaging desired plants.
  • Formulations: Weedkillers come in various forms, including liquid concentrates, ready-to-use sprays, and granules. The choice of formulation can depend on the size of the area and the convenience of application.
  • Timing and conditions: The effectiveness of post-emergent weedkillers can be influenced by the growth stage of the weeds and environmental conditions. Most are best applied when weeds are actively growing and before they have set seeds.

Safety and Environmental Considerations

When using post-emergent weed killers, it is essential to follow the manufacturer's instructions to minimize risks to humans, pets, and the environment. Always wear protective clothing, and be mindful of potential runoff that could affect water sources.

Post-emergent weed killers are vital for effective weed management, offering targeted solutions to keep landscapes healthy and aesthetically pleasing. Whether you're dealing with dandelions in your lawn or invasive species in a garden bed, there's a post-emergent product suited to your needs.

At Golf Course Lawn, we’re committed to helping you achieve the lawn of your dreams. Browse our full range of lawn-care products and get FREE shipping.

Not sure where to start?

Build a custom product bundle that's perfect for your lawn. Answer 6 easy questions to find the best solution.

Take the quiz

man wearing a hat looking up to left with hand on chin

Hear from our customers

Frequently asked questions

How are your products different from what I can buy at a local big-box store?

Our products are specifically formulated for golf course-quality lawns, offering professional-grade nutrients and performance. Unlike generic fertilizers, our solutions are optimized for precise results, ensuring a lush, green lawn that stands out.

Lawn care blog

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn

Pro formulas, real results

Curated lawn care

No guesswork

Unlock your best lawn