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Post Emergent Herbicide: Everything You Need to Know for a Healthy Lawn

Posted on March 3, 2023 by Lawn Doctor

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Are you a homeowner seeking the best way to keep your lawn weed-free? Post-emergent herbicides can be an effective tool in controlling unwanted weeds. But how do you choose the right post-emergent herbicide, and what should you know before applying it? In this blog post, we’ll discuss everything from selecting the correct product to common questions about using post-emergent herbicides. So let’s dive into understanding why post-emergent herbicide is so important.

What is Post Emergent Herbicide?

Post-emergent herbicides are products used to control weeds in lawns and gardens after they have already emerged from the soil. These products are typically applied as liquids or granules, either with a pump sprayer or broadcast spreader. Post-emergents attack weeds by targeting specific plant parts, such as leaves and stems, rather than attacking the plant roots like pre-emergent herbicides do.

Regarding post-emergent weed control, there are two types of herbicides: selective and non-selective. Selective herbicides target certain types of plants while leaving other plants unharmed. For example, some selective herbicides will kill broadleaf weeds without harming grassy weeds like crabgrass and Bermudagrass. Non-selective herbicide treatments kill all vegetation indiscriminately, so caution should be taken when applying them near surrounding grasses or desirable plants that you want to keep alive.

Systemic post-emergent herbicides contain active ingredients that traverse the entire plant after being absorbed through leaves or roots. This implies that even if only one part of a weed is treated with such products, it can still be eliminated due to the active ingredient migrating throughout its vascular system until reaching its root system, where it completely eradicates any weeds. On the other hand, contact-based treatments must come into direct contact with each weed for them to perish; these too can be effective but may require several applications depending on how many small weeds are present around your lawn care area needing treatment given time.

Post-emergent herbicides are an effective way to control weeds in your lawn, and with the right application techniques, you can ensure they work effectively. When applying post-emergent herbicide, it is important to take certain safety precautions and avoid common mistakes to get the best results.

How to Apply Post-Emergent Herbicide

Applying post-emergent herbicides can be a great way to control weeds in your lawn. Post-emergents are selective and control both grassy and broadleaf weeds. When used properly, they can be effective tools for controlling pesky weeds that have already sprouted up in your yard. Before applying any post-emergent herbicide, it is important to understand the different types of products available, safety precautions, and common mistakes to avoid when treating your lawn with these products.

Steps for Applying Post Emergent Herbicide:

To apply post-emergent herbicides correctly, you must first select the right product based on what type of weed you are trying to control and the surrounding grasses that may also be affected by the treatment. Once you have selected an appropriate product from those registered for use in your area, read all instructions carefully before the application begins. Depending on which type of herbicide you choose (granular or liquid), there are several methods of application, including broadcast spreaders or pump sprayers, that should always be followed exactly according to label directions. After the application has been completed, ensure no active ingredients remain on surfaces such as driveways or sidewalks where runoff could occur into nearby bodies of water like ponds or streams, which could cause environmental damage if not properly handled.

Adopting safety precautions when applying post-emergent herbicides is of the utmost importance. Ensure that protective clothing, such as long pants and sleeves, along with gloves, are worn to avoid any skin contact with active ingredients. Keep children and pets away from treated areas until completely dry after spraying to avert any accidental ingestion or absorption through their skin. Moreover, never mix more than one product at a time. This could create unexpected reactions leading to potential health risks due to improper mixing techniques used when combining multiple chemicals. To sum up, taking appropriate safety measures while utilizing post-emergent herbicides is essential for avoiding hazardous consequences.

Applying post-emergent herbicide can be a tricky process, but following the right steps and taking safety precautions will help ensure successful results. Choosing the right product is just as important – understanding active ingredients and reading labels are key to selecting an effective post-emergent herbicide for your lawn care needs.

Tips for Choosing the Right Post-Emergent Herbicide

When choosing the right post-emergent herbicide for your lawn care needs, there are several factors to consider. First, determine what type of weeds you need to target. Different types of post-emergent herbicides will be more effective on certain weeds than others. For example, broadleaf weed killers are best used for dandelions and other broadleaf weeds, while grassy weed killers work better against crabgrass and other grassy weeds.

Second, ask yourself how often you plan to use the product to choose an appropriate concentration level. If you only plan on using it once or twice a year, then a lower concentration may suffice; however, if you plan on using it multiple times throughout the season, a higher concentration is recommended.

Third, take into account any environmental concerns when selecting a post-emergent herbicide, as some products can have negative impacts on beneficial insects or nearby bodies of water if not applied correctly. It’s important to read labels carefully and understand active ingredients before purchasing so that any potential risks can be avoided or minimized. Additionally, many states require special licensing to purchase certain products, so ensure all requirements are met before purchase and application.

Finally, look for user reviews online from people who have used similar products in the past to get an idea of which ones tend to work best with minimal effort required for successful results. This will help ensure that your time and money are well spent when selecting a post-emergent herbicide for your lawn care needs.

Choosing the right post-emergent herbicide is an important step in maintaining a healthy lawn. That said, it’s also helpful to understand common questions about using these products so you can make an informed decision.


What are examples of post-emergent herbicides?

Examples of post-emergent herbicides include glyphosate, dicamba, 2-4D amine salts, triclopyr ester or amine salt formulations, glufosinate ammonium salt solutions, oxyfluorfen ethyl esters, and others. These chemicals work by entering the plant’s foliage and then traveling down into its roots, killing it completely. Post-emergent herbicides should be applied when temperatures are milder to prevent damage to desirable vegetation surrounding the target weed species.

What month should I apply post-emergent?

The best time to apply post-emergent lawn care treatments is typically in late summer or early fall. This will help ensure the treatment takes full effect and provides maximum protection against weeds and other pests. Applying post-emergent too soon can result in a less effective application, while applying it too late may not provide enough control for the following season. To maximize effectiveness, homeowners should plan to treat their lawns with post-emergents between August and October when temperatures are still warm but before cold weather sets in.

How often can you apply post-emergent herbicide?

Post-emergent herbicides should be applied according to the manufacturer’s instructions. Generally, it is recommended that post-emergent herbicide applications are done every 4-6 weeks during the growing season. However, this can vary depending on environmental conditions and weed species present in your lawn. It is essential to adhere to the instructions on product labels when utilizing any pesticide or herbicide to protect yourself, others, animals, and plants in proximity.

Post-emergent herbicides can be a great way to keep your lawn looking its best. By following the tips in this article, you should have no problem finding the right product for your needs and applying it correctly. With regular use of post-emergent herbicides, you can maintain a healthy and beautiful lawn all year round.

Take control of your lawn care needs with post-emergent herbicides from Lawn Doctor. Our experienced professionals will help you identify and treat weeds for a healthy, vibrant outdoor space.

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