A healthy lawn during the summer starts long before the hottest temperatures arrive. Properly adjusting mowing height, following an appropriate mowing schedule, and coordinating maintenance with irrigation are essential factors for strengthening grass during May and June.
Applying these practices helps develop deeper roots, improve heat resistance, and maintain a green, attractive lawn throughout the season.
How to Prepare Your Lawn for Summer Through Proper Mowing
As temperatures begin to rise in Western Washington, lawn care practices that work during the spring may require adjustments to prepare grass for the summer months. Among all aspects of lawn maintenance, the way grass is mowed has a direct impact on its ability to retain moisture, develop strong roots, and withstand heat stress. For this reason, it is important to begin with one of the most influential factors.
Adjust Mowing Height Based on Grass Type
One of the most common mistakes is cutting grass too short at the beginning of summer. Although it may seem like a way to reduce maintenance frequency, it actually increases plant stress and makes the lawn more vulnerable to high temperatures.
In Washington, many properties use cool-season grass varieties such as Kentucky Bluegrass, Perennial Ryegrass, and Fine Fescue. These species benefit from a slightly higher mowing height during the warmer months.
As a general rule:
- Kentucky Bluegrass: between 2.5 and 3.5 inches
- Perennial Ryegrass: between 2.5 and 3 inches
- Fine Fescue: between 3 and 4 inches
Maintaining longer grass blades provides natural shade to the soil, reduces evaporation, and encourages deeper root development.
Follow the One-Third Rule
To prevent damage to your lawn, never remove more than one-third of the grass blade length in a single mowing session.
For example, if the grass reaches 4.5 inches in height, it should not be cut below 3 inches. This practice minimizes stress, preserves the grass’s ability to photosynthesize, and helps retain moisture during the driest periods of summer.
Companies specializing in lawn care for Shoreline often consider this rule one of the fundamental principles for maintaining dense, healthy lawns.
Establish a Consistent Mowing Schedule
The ideal mowing frequency depends on the grass growth rate, which generally increases during spring and slows as temperatures rise.
During May and early June, most lawns in Shoreline may require:
- Weekly mowing during periods of active growth
- Mowing every 10 to 14 days as temperatures begin to rise and growth slows
More important than following a fixed calendar is monitoring the actual height of the grass and making adjustments based on weather conditions.
A well-planned lawn mowing schedule helps maintain a uniform appearance without creating unnecessary stress on the lawn.
Keep Mower Blades Sharp
Dull mower blades tear grass blades instead of making a clean cut. These irregular wounds cause moisture loss, encourage disease, and create a brown appearance at the tips of the grass.
Before the summer season begins, it is recommended to inspect and sharpen mower blades to ensure clean, healthy cuts.
Clean cuts heal faster and allow grass to better conserve its energy during the warmer months.
Coordinate Mowing With Your Irrigation Schedule
Irrigation and mowing work together to maintain a strong lawn throughout the summer.
The best practice is to water deeply and less frequently, allowing moisture to penetrate the soil and stimulate root growth.
For best results:
- Water early in the morning (between 5:00am and 9:00am)
- Avoid watering during the hottest hours of the day
- Wait until the grass is dry before mowing
- Avoid mowing immediately after irrigation
When grass receives adequate moisture and is maintained at an appropriate height, it develops greater resistance to heat and drought stress.
Leave Grass Clippings When Possible
It is not always necessary to collect grass clippings after mowing. When mowing is performed regularly and the clippings are small, they can decompose quickly on the lawn without affecting its appearance. This practice, known as mulching, helps return organic matter to the soil and supports a natural nutrient cycle. At Ballinger Landscaping, we switch from bagging clippings to mulching when lawns slow their growth in late spring.
In addition to benefiting the soil, grass clippings can complement other essential maintenance practices, including proper mowing height, a consistent mowing schedule, and efficient irrigation. When all of these factors work together, the lawn develops greater resistance to heat and maintains a healthier appearance throughout the summer months.
At Ballinger Landscaping, we understand that every property has unique needs. That is why we design maintenance programs tailored to Western Washington’s specific growing conditions, helping our clients maintain healthy, attractive lawns that are prepared to meet the challenges of the summer season.
