How to Keep Your Cool Season Grass Green in the Summer

Many gardeners face the challenge of keeping their cool season grass green during the hottest months of the year. While traditional practices like frequent fertilization and mowing can be effective, they may not be suitable for all lawns. In this article, we discuss alternative methods that can help maintain the health and appearance of cool season grass without excessive maintenance.

Understanding Cool Season Grass

Cool season grass, such as fescue, performs best in cooler temperatures. It typically thrives in regions with moderate climates and can tolerate a wide range of conditions. However, in the summer, these grasses can face challenges such as increased stress, faster growth rates, and potential drought.

Optimal Cutting Height and Frequency

To ensure the health of your cool season grass during the summer, it is essential to maintain the correct mowing height. Mow your lawn to a height of over 3.5 inches. This height allows the grass to remain robust and reduces the need for frequent mowing. Aim to mow your lawn as tall as possible, and do so about once a week. If you notice that your grass needs to be mowed more frequently (more than a third of its height at a time), it might indicate that you need to adjust your mowing schedule or reduce watering and fertilization.

Watering and Moisture Management

Proper watering is crucial for keeping your cool season grass green during the summer. Ensure that your grass receives at least 1 inch of water per week. Avoid frequent light waterings, as they prevent the roots from growing deep enough to survive during dry periods. Deep, infrequent watering encourages the grass to develop a healthy root system, which is more resilient in times of drought.

Managing Different Grass Types

While fescue is commonly found in shadier areas of your property, other types of grass, such as zoysia, may be more prevalent in sunnier areas. If you have a mixture of grass types, tailor your maintenance practices to suit each one. For example, you may not need to water or fertilize heavily in shady areas where fescue thrives. Zoysia, on the other hand, may benefit from early morning watering to sustain its vibrant green color, especially during dry periods.

Using Natural and Organic Methods

If you prefer to avoid synthetic fertilizers and treatments, there are natural methods you can use. In the 1950s, original fescue was typically left untreated, allowing it to adapt to local conditions. Today, similarly, you can harvest and eat the grass if it isn't treated, as it won't contain harmful chemicals. Using a 21-inch mulching mower with a 4-inch mowing height can help reduce weed growth and maintain soil temperature, promoting better water retention.

Additional Tips for Summer Grass Care

For those seeking a deep green color similar to what you'd see in springtime, consider supplemental watering. However, if simplicity is preferred, mowing your lawn once a week can maintain a healthy and attractive green color.

Enhancing Grass Health with Growth Regulators

If you happen to have perennial rye grass, applying a growth regulator in the spring can help keep your lawn green even during summer droughts. These regulators can slow down growth and promote a consistent, green appearance throughout the season.

By following these tips and understanding the unique needs of cool season grass, you can help keep your lawn looking green and healthy even during the hottest summer months.