Can You Lay Sod Over Existing Grass
Laying sod is the only way of achieving a lush, instant lawn. Homeowners usually choose sod over seed and straw because of the time it takes to grow mature grass with seed. The question we get asked the most at Hoosier Turf Sod Farm is whether they can lay sod over existing grass to save time and effort. Today we will explore the feasibility of laying sod over existing grass, the best practices for installing sod, and alternative methods to ensure your lawn thrives. We’ll also address common concerns and provide actionable tips to help you make the best decision for your yard.
Understanding the Basics of laying Sod
Laying sod involves placing pre-grown, mature grass directly onto a prepared surface. Sod provides an instant green lawn and an instant ground covering to prevent erosion and washouts. However, the success of sod installation heavily depends on proper ground preparation and adherence to best practices.
Can you lay sod over existing Grass?
No, you can not lay sod over existing grass.
While it is technically possible, it is generally not recommended due to several potential issues that can affect the health and longevity of your new lawn. Let’s dive into the reasons why this approach is very problematic.
Issues with Laying Sod over Existing Grass
Poor Root Establishment
One of the main challenges of laying sod over existing grass is poor root establishment. For sod to thrive, its roots need direct contact with the soil. Existing grass can create a barrier, preventing the new sod from rooting properly. This can lead to weak, patchy growth and a lawn that is more susceptible to drought and disease.
Thatch Build Up
Existing grass often has a layer of thatch, dead grass, roots, and debris that accumulate on the soil surface. Laying sod over this thatch can impede water, air, and nutrient penetration, further hindering root growth and overall lawn health.
Soil Leveling Issues
Laying sod over uneven existing grass can result in an uneven lawn surface. High spots may cause the sod to dry out quickly, while low spots can lead to water pooling and potential root rot. Achieving a smooth, level surface is crucial for the success of your new lawn.
Large rolls of sod being delivered in Floyds Knobs, Indiana by Hoosier Turf
Laying sod over existing grass is not recommended.
Best Practices for Laying Sod
Proper Ground Preparation
To ensure the best results when laying sod, proper ground preparation is essential. This includes removing existing grass, leveling the soil, and ensuring adequate soil quality.
Step 1: Remove Existing Grass
Start by removing the existing grass and weeds from your lawn. This can be done using a sod cutter or by manually digging up the grass. Removing the old grass ensures that your new sod will have direct contact with the soil, promoting healthy root growth. Some homeowners and landscape companies use the total kill method. They spray the yard with a weed killer to eliminate all grass and weeds.
Step 2: Test and Improve Soil Quality
Test your soil to determine its pH and nutrient levels. Amend the soil as needed to create an optimal environment for your new sod. This might include adding lime or fertilizer to improve soil structure and fertility. A soil test can be taken to your local farm extension agency. For example, our local agency would be the Purdue Extension – Floyd County or the Purdue Extension – Scott County.
Step 3: Level the Soil
Ensure that the soil surface is smooth and level. Use a rake to remove any debris, rocks, or clumps of soil. This step is crucial for preventing water pooling and ensuring even growth of your new sod. It also ensures you have a smooth lawn when mowing grass after it is established.
Step 4: Lay the Sod
Lay the sod pieces in a staggered, brick-like pattern to minimize seams and create a uniform look. Ensure the edges of each piece are tightly butted together to prevent gaps.
Step 5: Water the Sod
After laying the sod, water the sod thoroughly to help it settle and begin the rooting process. Water is the most important aspect of your sod rooting and surviving. If your sod is not floating away, you do not have enough water. A common misconception is that only the sod itself needs to be wet. When watering sod, the ground below the sod needs to saturated as well.
Frequently Asked Questions about Sod
How Long Does It Take for Sod to Root?
Sod typically takes about two weeks to start establishing roots, but it can take up to six weeks for full root development. Proper watering and care are essential during this period.
Can I Lay Sod in Any Season?
The best time to lay sod is during the growing season. Spring and Fall are ideal. However, it can be laid in summer with careful watering or even in winter in milder climates.
How Often Should I Water New Sod?
New sod should be watered daily for the first two weeks to keep the soil consistently saturated. Gradually reduce the frequency as the sod establishes roots, eventually transitioning to a regular watering schedule based on your climate and grass type.
Conclusion
Laying sod over existing grass is not recommended due to potential issues with root establishment, thatch buildup, and soil leveling. Proper ground preparation is key to the success of your new lawn. By removing the existing grass, improving soil quality, and following best practices for sod installation, you can achieve a lush, healthy lawn that will thrive for years to come. Maintaining a healthy lawn also requires ongoing care and attention. By following these guidelines and making informed decisions, you’ll be well on your way to enjoying a beautiful, green lawn.
