Optimizing Turf Laying Over Existing Lawns: Techniques and Considerations

When considering turf laying over an existing lawn, one must weigh the benefits and drawbacks of this approach to ensure a successful outcome. There are several key factors to consider, including the condition of the existing lawn, the type of turf to be laid, and the methods for preparing the ground. This article delves into these aspects to provide a comprehensive guide on how to lay turf over an existing lawn without removing the old one first.

Conditions of the Existing Lawn

Before deciding to lay turf over an existing lawn, it is important to assess the condition of the current lawn. A compressed and solid old lawn is not ideal for supporting new turf as it could lead to uneven growth and poor drainage. Moreover, the existing grass may be in poor condition, such as being overly compressed or filled with weeds, which could hinder the new turf.

According to expert advice, it is generally better to break up the old sod, add compost and drainage materials, and level the ground to improve growing conditions. This method not only maximizes the stability and coverage of the new turf but also enhances the health and appearance of the entire lawn.

Preparing Ground for New Turf

There are different approaches to preparing the ground for new turf. One method involves laying the new turf directly over bare spots after slightly working the soil and perhaps fertilizing. This method can be effective in certain situations, such as when the lawn has thin grass coverage or bare areas.

However, laying turf directly over thick weeds or existing grass is not recommended as it can lead to competition for resources and uneven growth. The new turf may struggle to establish itself, resulting in a patchy and unsightly lawn. In such cases, it is advisable to remove the existing growth first. Various tools can be used to peel up the old sod, making it a relatively easy process similar to how growers remove healthy grass for sale.

Turf Types and Compatibility

When laying turf over an existing lawn, it is crucial to match the grass type of the current lawn. This ensures better compatibility and reduces the risk of compatibility issues between the new and existing grasses. If the old turf needs to be removed, it is important to cut out the patches or replace the whole sod to allow the new turf to root into the ground.

Directly laying sod over an existing lawn is possible but not recommended, as it can lead to various problems such as uneven growth, drainage issues, and competition between the new sod and existing grass. For the best results, it is advisable to remove the existing turf, prepare the soil properly, and then lay the new sod to ensure a healthy and uniform lawn.

Killing Existing Grass

For situations where the old grass cannot be removed, it is important to consider methods to kill it and prepare the ground for new turf. Chemical treatments are one option to effectively kill the existing grass. A recommended mixture is a blend of glyphosate and fluazifop. This mixture should be applied three times with the specified rates of 12.8 oz. of 41% glyphosate per gallon and 2/3 of an ounce of commercial grade Fusilade II per gallon.

Proper application of these chemicals is essential, as overuse can harm beneficial plants and soil microorganisms. Following the label directions exactly and making the applications 5 to 7 days apart is crucial for effective grass removal.

Conclusion

In most cases, it is recommended to remove the old grass before putting ground cover on top of it. The old grass can compete with the ground cover for nutrients, water, and sunlight, potentially hindering its growth and establishment. Removing the grass also allows for better soil preparation, which can lead to healthier ground cover growth.

However, in some situations, such as using a thick mulch layer, it may be possible to suppress the grass without removing it. Nevertheless, this approach may not work for all ground cover types. Always ensure that the methods chosen will not negatively impact the environment or adjacent plants.