Will Zoysia Choke Out Crabgrass?

Are you wondering if Zoysia grass will be able to choke out crabgrass in your lawn? Well, it is possible. While both of these types of grasses can create beautiful and lush lawns, if left unchecked, crabgrass can spread rapidly and take over other patches of grass.

It’s important to understand the factors that can cause zoysia to choke out crabgrass so you can maintain a healthy balance in your yard.

In this article, we will discuss the various techniques that can be used to help prevent crabgrass from taking over while still allowing your zoysia lawn to flourish. Read on to learn more about how you can control and manage crabgrass growth in a zoysia lawn.

Will Zoysia Choke Out Crabgrass?

Zoysia grass can potentially choke out crabgrass, as it is a slow-growing, dense-matting grass species that can effectively crowd out weeds and other grasses through its ability to form a thick, interlocking root system.

However, the success of this depends on various factors, such as the growing conditions, the maturity of the Zoysia grass, and the type of crabgrass present. To optimize the chances of Zoysia choking out crabgrass, proper maintenance practices, such as proper mowing, fertilizing, and weed control should be followed.

Factors That Can Cause Zoysia to Choke Out Crabgrass

Crabgrass is a common problem in lawns, and once it takes hold, it can be difficult to get rid of. Zoysia grass may help reduce the spread of crabgrass in your lawn, as it has the ability to out-compete it for space and resources. However, there are several factors that can affect whether or not zoysia will be able to successfully choke out crabgrass.

Sunlight is one of the biggest factors when it comes to zoysia’s ability to overtake crabgrass. Zoysia needs more sunlight than crabgrass does, so if your lawn receives more shade than sun, zoysia may not be able to outcompete crabgrass.

Nutrient availability is also important; crabgrass needs fewer nutrients than zoysia does, so if your soil is nutrient-poor or lacks certain nutrients (such as nitrogen) then zoysia will struggle to overtake crabgrass.

The health of both grasses also affects how well they compete with each other; if either one of them is unhealthy due to disease or other problems such as drought stress or poor maintenance practices, then they won’t be able to compete effectively with each other.

Finally, the amount of water they receive can make a difference; if one grass gets too much water while the other doesn’t get enough, then that could affect which one wins out in the end.

By understanding these factors and taking steps to ensure that your lawn has an ideal environment for both types of grasses, you can increase your chances of success in getting rid of crabgrass and having a healthy lawn filled with lush zoysia grass instead.

Crabgrass Control In A Zoysia Lawn

Crabgrass is an unwelcome weed in any lawn, but it can be especially difficult to control in a Zoysia lawn. Zoysia is a warm-season grass that has deeper roots and thicker blades of grass than other warm-season grasses. This makes it difficult for crabgrass to compete with the stronger, healthier blades of grass in a Zoysia lawn.

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The best way to prevent crabgrass from taking over a Zoysia lawn is through regular maintenance. Mowing at the correct height for your particular grass type should be done on a regular basis.

Proper fertilization and watering will also help keep your Zoysia healthy, so that it can outcompete any invading crabgrass. If you do spot some crabgrass growing, you can use either chemical or manual methods of control.

Chemical control involves using pre-emergent herbicides when the weather starts warming up in the spring. These herbicides are usually applied before any weeds have started germinating, as they are designed to prevent weed seedlings from sprouting.

Post-emergent herbicides can also be used after weeds have already started growing. You can choose between chemical and organic options when selecting this type of herbicide.

Manual control involves removing the existing crabgrass manually by pulling them up or using other tools such as hand cultivators or hoes to dig out the weeds’ root systems. Manual labor may require more time and effort than chemical methods, but it is much gentler on your Zoysia lawn since there are no harsh chemicals involved.

Overall, proper maintenance is key for preventing crabgrass growth on your Zoysia lawn. By keeping your lawn healthy with regular mowing, watering and fertilizing, and intervening quickly if any weeds do appear with chemical or manual methods of control, you’ll be able to successfully keep crabgrass from taking over your beautiful turf.

Chemical Crabgrass Control

Chemical control of crabgrass in a Zoysia lawn can be accomplished with pre-emergent and post-emergent herbicides. Pre-emergent herbicides are applied before the crabgrass germinates and help to prevent it from growing, while post-emergent herbicides are applied after the crabgrass has already sprouted and helps to kill it.

When using chemical control for crabgrass, it is important to use an herbicide that is specifically designed for controlling this type of grassy weed. There are many different types of pre-emergent and post-emergent herbicides available in both granular and liquid forms.

It is important to read the label on each product carefully since some formulations may not be suitable for Zoysia grass. Additionally, some pre-emergent and post-emergent products may contain combinations of active ingredients that are designed to target multiple weed species at once.

It is also important to apply the correct amount of the herbicide according to manufacturer instructions as too much or too little can lead to ineffective results or damage to surrounding vegetation.

Additionally, when applying your pre or post-emergent herbicide make sure you water it into the soil so that it reaches the roots of any weeds present as this will ensure better results over simply spraying the leaves alone.

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Finally, be mindful that some products labeled as “weed killer” may also harm beneficial insects like bees, so check with local authorities about any restrictions that may apply prior to using these types of products on your lawn.

Crabgrass Control With Post-emergent Herbicides

Post-emergent herbicides are an effective way to control crabgrass in a Zoysia lawn. These herbicides target and kill existing crabgrass plants while leaving other grasses unharmed. They can be applied as a liquid or granular form, depending on the specific product.

When using post-emergent herbicides, it is important to read and follow all instructions carefully. A single application of the product may not be enough to completely eradicate crabgrass, so multiple applications may be needed over the course of several weeks or months to achieve optimal results.

It is also important to note that most post-emergent herbicides will only kill actively growing weeds and will not prevent new weeds from germinating in the future.

Additionally, post-emergent herbicides should only be applied when temperatures are cool – usually between 55°F and 75°F – in order for them to be as effective as possible. Applying these products when temperatures are higher can cause them to burn or damage desirable turfgrass species, such as zoysia grass.

Finally, avoid using these products near bodies of water, as they can easily contaminate streams and lakes if they come into contact with water runoff from your yard.

Overall, post-emergent herbicides can be an effective way to control crabgrass in a zoysia lawn if used properly according to the product’s instructions. Doing so will help keep your lawn looking healthy and free of unwanted weeds.

Manual Crabgrass Control

Manual crabgrass control is a great way to tackle the problem of weeds invading your zoysia lawn. It involves removing the weeds by hand before they spread and taking extra care to ensure that the roots are removed as well, otherwise they can come back even after you have pulled them out.

One of the most effective methods for manual crabgrass control is to use an implement such as a hoe or cultivator to remove weeds from the soil. You should begin by digging gently around each weed and then pull it out with your hands.

Be sure to get as much of the root system as possible, as this will help prevent regrowth. Additionally, be sure to dispose of all removed weeds in the trash, so that they do not return and spread their seeds in your yard.

Another manual method for controlling crabgrass is spot-treating individual plants with a selective herbicide such as glyphosate or triclopyr. These herbicides are absorbed by the leaves and then translocated throughout the plant, killing it in just a few hours or days depending on environmental conditions.

When applying these products, be sure to read and follow all label instructions carefully for best results and safety reasons.

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Finally, regular mowing can also help keep crabgrass at bay since it reduces competition for resources between grasses and weeds. Mowing your zoysia lawn at least once per week during its growing season keeps it healthy by reducing thatch buildup and promoting even growth of grasses in areas where they may be competing with crabgrass or other unwanted weeds.

Crabgrass Control: Healthy Maintenance

Maintaining a healthy lawn is the best way to keep crabgrass at bay. Healthy turf usually has a vigorous, dense growth that helps suppress weeds, including crabgrass.

To ensure that your zoysia lawn remains healthy and robust enough to choke out crabgrass, you’ll want to perform regular maintenance tasks such as mowing, fertilizing, aerating and overseeding.

Mowing regularly will help maintain the desired height of your zoysia grass while also encouraging the leaf blades to grow denser. This creates a thick turf that can crowd out crabgrass seeds from taking root and germinating. Depending on the type of zoysia grass you have, it generally should be mowed between 1”-3” high for optimal health.

Fertilizing with a well-balanced fertilizer helps encourage vigorous growth and promotes deep roots in your zoysia lawn so it can better compete with crabgrass. Generally speaking, zoysia grass needs only one or two applications of fertilizer per year – spring and fall are good times to apply it – but this can depend on the type of soil in which it is planted and the time of year when it was first established.

Aeration opens up compaction caused by foot traffic by creating small holes in your lawn where oxygen, water, fertilizer and other essential nutrients can penetrate more deeply.

Aeration also helps reduce thatch build-up which prevents water from reaching the roots of both your desirable grasses and any pesky weeds like crabgrass trying to take hold.

Finally, overseeding is an important step for revitalizing thinning areas of your lawn or filling in bare spots because it encourages new seedlings to establish themselves quickly and effectively compete against any weed invasions like crabgrass. The best time for overseeding is typically late summer or early fall when soil temperatures are still warm enough for germination.


In conclusion, zoysia can be a great choice for lawns if it is kept healthy and maintained properly. While it may choke out crabgrass, the appropriate methods for control must be employed to keep the problem from getting out of hand.

Factors such as soil type and climate can play a large part in whether or not zoysia will take over from crabgrass. Chemical, pre-emergent, post-emergent and manual methods are all available to help keep crabgrass under control in a zoysia lawn.

Taking the necessary steps to ensure that your lawn stays healthy will help minimize any potential issues with crabgrass and make sure your lawn looks its best.