
The Pros of Dethatching Your Lawn
- Helps water, nutrients, and oxygen to penetrate the soil, which your grass needs to live.
- Reduces fungal diseases in your grass by preventing the anaerobic conditions in which fungal disease thrives.
- Reduces pest pressure as pests can’t inhabit and eat the thatch.
How to tell if your lawn needs dethatching?
Other Signs That Your Lawn Needs Dethatching
- Brown patches on your lawn
- Frequent lawn diseases
- Lawn insect infestation
- Generally stressed lawn
What does dethatching do for your lawn?
- The grass blades, themselves: This is the level that you see. ...
- The soil
- The layer of thatch between the grass blades and the soil
When, why and how often to dethatch lawn?
When to Dethatch the Lawn Generally, lawns prone to thatch buildup should be dethatched once a year. “Dethatching is typically done when the lawn is growing and able to repair and recover, and when weather conditions are conducive to survival (not too hot, cold, dry, wet…),”
Why, when and how to dethatch your lawn?
It becomes too thick (1 inch or thicker), leading to the following problems:
- It forms a barrier that deprives the root system of air, water, and nutrients.
- It promotes insect infestations.
- Lawn diseases are more likely to take hold.
- Patches of lawn with thick layers of thatch become spongy. When mowing your lawn, the mower wheels sink down in these areas, resulting in a lower cut. ...

Is dethatching a lawn necessary?
Thatch builds up over time, so it's not necessary to dethatch every year. Plan on doing it every five years or so if your lawn needs it. You might want to give your lawn a quick check every year just to see how much thatch has accumulated.
When should I dethatch my lawn?
For northern grass the best time to dethatch your entire lawn is in late summer to early fall when the grass is actively growing. For southern grasses, dethatch in late spring. In early spring, and for small areas, use a thatching rake, which is a sharp-tined rake that rips the thatch out of the lawn.
What's the benefit of dethatching your lawn?
Dethatching helps to circulate air deep down into the roots and provide the necessary carbon dioxide, stimulating existing roots while encouraging new root growth. Fertilizer Will Become More Effective- Removing thatch helps fertilizer to blend more properly with the soil and spread throughout the lawn.
Is it better to dethatch or aerate?
It is best to dethatch first before aerating your lawn. Both dethatching and aerating your lawn will improve air, nutrient, and water penetration into the root zone of your grass. Thatch is the main problem these two processes address.
Should you seed after dethatching?
After dethatching, thatch should be removed and put in the compost pile. If you do not already have a compost pile, then you should seriously consider adding one. After this has been done, high-quality grass seed.
What do I do after I dethatch my lawn?
After dethatching, rake up the newly exposed thatch. Mowing your lawn will also help to clean things up. Fertilizing at this time is also important. This will help your lawn recover and get much needed nutrients.
Is aerating and dethatching the same?
While dethatching removes the layer of thatch above the soil surface, aeration removes actual plugs of soil from your yard. With looser, more nutrient-rich soil, root systems can spread out and grow deeper into the soil. Holes in your yard may not be glamorous, but they'll quickly fill in with dense, healthy grass.
Can dethatching hurt your lawn?
Dethatching Damage Spring dethatching hits a lawn hard when it is already in a precarious condition. Secondly, dethatching in the spring with power equipment can bring up crabgrass and other noxious weed seeds, setting your lawn up for a future infestation.
Does dethatching help with weeds?
Dethatching a lawn is a process whereby gardeners remove the thatch layer from their lawn. The objective of this is usually to make it easier for water, air and nutrients to reach the grass's roots. It also helps with weed control and fertilization.
What does thatch look like in lawn?
0:062:28**WHAT IS THATCH IN YOUR LAWN?!?!?! - YouTubeYouTubeStart of suggested clipEnd of suggested clipThis is exactly what it looks like when thatch dies out it'll be very spotty. And it'll die inMoreThis is exactly what it looks like when thatch dies out it'll be very spotty. And it'll die in usually circle area so they'll be green green grass in between and this is all from thatch.
Does dethatching improve drainage?
Regularly dethatching about once a year will remove the thatch buildup and improve the drainage of the soil. Small areas can be dethatched with a dethatching rake, which you use in the same manner as a garden rake.
Can you dethatch with a regular rake?
A regular leaf rake will not adequately remove thatch from a lawn. A small amount of thatch may be removed but trying to dethatch with a leaf rake may cause damage to your lawn. Use a verticutter or dethatcher attachment for your lawnmower.
When to dethatch grass?
Active grass growth helps speed your lawn's recovery. Dethatch cool-season grasses, such as Kentucky bluegrass, in late summer or early fall. Dethatch warm-season grasses, such as Bermudagrass or Zoysia grass, after spring green-up, as they enter early summer's peak growth. Never dethatch when your lawn is dormant or stressed;
What is a manual dethatching rake?
Manual dethatching rakes are heavy, short-tined rakes with curved blades designed to dig into your lawn and pull up thatch as you rake. Dethatching rakes are good for light thatch and general thatch maintenance on small lawn areas.
What is a power rake?
Power rakes work well for lawns with thinner thatch layers and grass that can withstand intense raking. Vertical mowers, also called verticutters, have vertical blades that slice down through the thatch layer and into soil, pulling thatch—and often grass roots—to the surface as they go.
How to tell if your lawn has thatch?
Take a garden trowel or spade and dig up a small wedge of your lawn grass and soil. You'll be able to see and measure its thatch layer. If your thatch is 1–2 inches or more, you've probably already seen signs of poor grass color and weak, thin growth. Once you've confirmed your thatch exceeds the healthy mark, the time for dethatching has come.
Why is thatch a barrier?
Water from irrigation can accumulate in the thatch layer, too, so grass roots suffocate from lack of air.
What is thick thatch?
Thick thatch also provides a breeding ground for lawn disease and insect pests. Some lawn grasses are more prone to thatch buildup than other. Vigorous, spreading grasses such as Kentucky bluegrass, Bermudagrass and creeping fescues, may need regular dethatching.
How thick is a thatch layer?
A thin thatch layer, less than 1/2-inch thick , is beneficial to lawn health.1 It acts as an organic mulch to help conserve soil moisture and protect against big fluctuations in soil temperatures. A thin thatch layer allows water, nutrients and air to penetrate into soil and reach waiting plant roots.
Why is dethatching important for grass?
As much as dethatching can help water and air flow through the soil, so too will it give a boost to the nutrients that the root system might have been denied for so long. Like all plant life, grasses need nutrients in order to grow and sustain health. The most important of these are nitrogen, phosphorus and potassium.
Why do you need to put thatch in your lawn?
Thatch can help protect the lawn from foot traffic, lawnmower use, and strong sunlight, and provides a nice layer of insulation in colder temperatures. As such, you shouldn’t strip your lawn of this layer too much – and allow nature to take its course when and where possible, breaking down the layer of thatch naturally and in its own time.
What happens if you put a thick layer of thatch on your lawn?
If you have a thick layer of thatch covering your lawn, it’s going to act as a barrier to any lawn care product you’re trying to put down. Fertilizers, feeds, and weed killers are going to be much less effective if they can’t get to where they need to be.
Why is thick thatch good for lawn?
Helps Prevent Pests and Disease . A thick layer of thatch can be a playground for undesirables in your lawn, and can encourage pests and disease to thrive. Remove the chance for such things to take hold, and your lawn will be much healthier for it.
What happens if my yard doesn't have drainage?
If your garden doesn’t have sufficient drainage, it could cause all sorts of problems all around your property – and possibly into your neighbors property, too. Removing a heavy thatch layer can get your lawn working for you, and help prevent this from happening.
What happens if you don't dethatch?
If you don’t dethatch, what happens is that layer of dead material soaks up any rainfall like a sponge, preventing the goodness from reaching the grass roots. Eventually, you’ll start to see patches of brown or yellow grass appear as your lawn isn’t getting enough water soaking through into the soil.
Does thatch choke grass?
Speaking of strangling, lots of thatch on your lawn can choke out existing grasses, preventing air and water from flowing freely and accessing the root system. Once you remove all that dead weight, air and water will be able to penetrate the soil, and over time you’ll start to see a greener, lusher lawn as a result.
How do I dethatch a lawn?
Dethatching your lawn is actually relatively simple. Here’s the breakdown: 1 Remove any sprinklers or lawn fixtures that might get in your way. 2 Mow your lawn to half its normal height—this will make the dethatching process easier. 3 Gently rake across the lawn with either a power or manual rake. (If you have a small yard with several hard-to-reach places, you might want to manually rake it. For larger yards, consider renting a Power Rake or investing in an attachment for your lawn mower.) 4 Gently remove all thatch. Remember to work slowly and precisely—you don’t want to kill any living grass in the process. 5 After you’ve finished, clean up the lawn and remove any remaining debris. It might look bad at first, but rest assured, the grass will perk up again in no time.
What to do after dethatching?
The one thing you’ll definitely want to do after dethatching is to give your lawn a round of fertilizer and keep it well-watered —both of which will help it to recover. Leahy even recommends planting more grass seed at this time for a thicker and healthier yard. “The thicker the grass grows,” he says, “the better it’s able to withstand stressors in ...
Does thatch hurt your lawn?
A little thatch, Dwyer says, never hurt anybody. In small amounts, thatch can actually help your lawn by insulating it from extreme temperatures, keeping much-needed moisture in the soil, and providing an extra layer of protection when your in-laws come over with their huge dogs (OK, this last part was just us, but still…).
Does lawn thatch break down?
Keep in mind that sometimes, lawns will break down the accumulation of thatch naturally. “Lawns growing on good soil and that are properly fed may never have a thatch buildup,” Dwyer says. Thatch becomes a concern when the buildup happens too quickly.
What is a dethatching mower?
Resembling a heavy-duty power mower but with a series of spinning vertical knives, it cuts through thatch. Dethatching often creates a large volume of debris that must be removed. If the debris is weed-free and you have not used herbicides or pesticides on your lawn, compost it.
When should I dethatch my lawn?
The best time to dethatch cool-season lawns is late August to early October, depending on your location, when the grass is growing vigorously and few weed seeds are likely to germinate.
What to use to pull out thatch from lawn?
For lawns with moderate levels of thatch, aerating (see below) may do the trick. Or use a cavex rake (aka thatching or lawn dethatcher rake)—which has unusual semicircular tines. Those knifelike blades cut through the sod and pull out thatch.
Why is aerating important?
The roots of all plants need air as much as water, which is why aerating is so important. It’s a simple process of perforating the soil (and any thatch) while removing plugs of lawn that leave behind small holes that allow water, air, and fertilizer to get to roots.
How do I know if my lawn has thatch?
There are multiple ways to figure out if your lawn has a thatch problem. The easiest is to simply check to see if your lawn is green on top but brown below. The best time to check is after you mow when you have just cut off the top green growth so the lawn will look brown and/or dead. Either of those conditions indicates thatch.
How many holes per square foot for a lawn aerator?
You steer it across the lawn—several times in different directions—to break up compacted soil as much as possible. (Aim for 20 to 40 holes per square foot.)
What is thatch in grass?
Thatch is a matted layer of grass stems, roots, stolons, rhizomes, and other organic debris that builds up faster than it can decompose. Thatch accumulates immediately below the green surface of the lawn—on top of the soil at the base of blades. A layer of thatch that’s less than ½ inch thick is normal and does not present cause for action.
How do I dethatch a lawn?
You DO need to dethatch your lawn if: 1 The thatch layer is more than ½” thick, as the mats of slowly decaying thatch will create mats and anaerobic conditions where fungal disease and lawn pests thrive. 2 You plan to overseed or add compost and the thatch layer is preventing the seed or compost from reaching the soil.
What are the pros and cons of dethatching your lawn?
The Pros of Dethatching Your Lawn. Helps water, nutrients, and oxygen to penetrate the soil, which your grass needs to live. Reduces fungal diseases in your grass by preventing the anaerobic conditions in which fungal disease thrives. Reduces pest pressure as pests can ’t inhabit and eat the thatch. Allows compost to reach the soil where ...
Why is my lawn thatch thick?
The layer of thatch is ½” thick, as it benefits your lawn by providing mulch and organic matter. Soil compaction is the root cause of your lawn’s stunted growth. In that case, you’ll want to aerate your lawn.
Why mulch your lawn?
The mulch keeps your grass shaded so you need to water less, and the beneficial microbes and worms in the soil will break down the thatch into nutrients that benefit your grass which means less fertiliser needed. Dethatching stresses out your lawn as it will cut the grass. Done at the wrong time of year, when the grass is dormant, heat-stressed, ...
What is thatch in grass?
Firstly, thatch is the layer of living and dead grass shoots, stems, and roots that builds up between the grass blades and the soil. Dethatching is removing that layer of thatch to help your grass grow. When thatch grows more than ½” thick, it can suffocate your grass, preventing moisture from reaching the soil and preventing ...
How does nitrogen affect grass?
Synthetic nitrogen creates thatch by 1) causing grass to grow too fast, creating more root and leaf build up as a byproduct and 2) destroying the beneficial microbes in the soil that would otherwise break thatch down into nutrients your grass would benefit from .
How thick is thatch?
The thatch layer is more than ½” thick, as the mats of slowly decaying thatch will create mats and anaerobic conditions where fungal disease and lawn pests thrive. You plan to overseed or add compost and the thatch layer is preventing the seed or compost from reaching the soil.
Why is dethatching important?
Dethatching is mostly compared to aeration. Why’s that? The removal of the organic layer by a dethatching service promotes proper air circulation to the soil. If your lawn has thatch build-up, it will restrict adequate air from getting to the soil.
Why do you need a dethatching service?
Thing is, when there’s thatch build-up on your lawn, healthy root growth is problematic. So, that means that your lawn will not have the desired greenness or thick covering.
Why is a lawn important?
Such a lawn will be well mowed, and the lush appearance improves the general appearance of your home. If your home has thatch build-up, however, then it will have brown patches all over, thus making the entire space unattractive.
Why is landscape design important?
The purpose of landscape design and lawn maintenance is to make sure your lawn remains healthy. However, neglecting it might cause it to lose the green color. It could even be a breeding ground for parasites and also promote diseases which affect the grass.
Is dethatching a good lawn care service?
Lawn care is a necessity. However, a majority of homeowners think that it only involves mowing, fertilizing, and watering the lawns. But there is another vital activity that homeowners tend to neglect, dethatching. A lawn dethatching service plays a significant role in the health and future of a lawn as long as it’s done correctly and by a professional. That’s why we advise homeowners to look for a dethatching service near me when they need such lawn care done. Dethatching will help to restore your lawn to a healthy state, keeping your property beautiful for years.
Does thatch keep the soil cool?
Now you see, some light layers of thatch could work to keep the soil cool. However, if a lot of thatch accumulates, and you leave it there for long, it could have serious consequences. Among these consequences include high temperature levels, which might affect the health of your lawn.
Is thatch removal a mechanical process?
In case you didn’t know, thatch removal is a mechanical process. Consequently, it requires the application of the right tools. Besides, the work needs to be done with the utmost precision. That means it has to follow a series of steps and also the work should be done by a professional.
What does a dethatcher do?
What Does a Lawn Dethatcher Do? A lawn dethatcher can help maintain healthy, dense turfgrass when used in tandem with appropriate species and cultivar selection, excellent site preparation and proper turf maintenance practices.
What is the necessary part of lawn maintenance?
One necessary aspect of routine lawn maintenance involves addressing excessive thatch, the layer of dead and living plant stems, roots and other parts that forms between the green grass blades and the soil level.
How thick is a thatch layer?
The University of California Statewide Integrated Pest Management Program cautions that an overly thick thatch layer -- more than 1/2-inch thick can block the flow of air and moisture to the roots and can harbor pests and fungal pathogens.
What is coring in lawn?
Coring removes cores of soil and sod, allowing air and moisture to penetrate the thatch layer and aiding decomposition. The University of Missouri Extension notes that coring is less stressful for the lawn and causes less damage than using a dethatcher.
