While we might not pay that much attention to what height we set the mower on when we cut our grass, the truth is, mowing height plays a crucial role in lawn health and is an essential factor to pay attention to if you want to improve your lawn and have the greenest, lushest grass on your block.

To have a healthy lawn all year long; it's essential to select the proper cutting height depending on the type of grass you have. For example, the optimal mowing height for warm-season grasses is 2-4 cm, whereas when it comes to cool-season grasses, you should set your mower to 3 cm in winter and 5 cm in summer.

Cool-season varieties include:

  • Tall Fescue varieties

  • Fine Fescues varieties

  • Kentucky Bluegrass varieties

  • Rye varieties

Warm-season varieties include:

  • Kikuyu varieties

  • Couch varieties

  • Buffalo varieties

Additionally, to cut the grass even more effectively, it's essential to keep your blades nice and sharp, as it is almost impossible to achieve a clean cut using dull blades.

Now that we've covered some of the basics when it comes to selecting the right mowing height, it's time to take a look at some of the main benefits of following this principle.

1. Stronger and healthier grass

When you mow your lawn taller, you have longer blades of grass. This allows for the process of photosynthesis to take place due to the increased surface area. Thanks to increased photosynthesis, your lawn grows healthier, and its grassroots grow stronger in the process.

2. Protected root system

Another benefit of cutting your grass tall is that its blades serve as protection for the root system during hot and dry summer days. It keeps the roots from overheating and keeps the moisture from escaping. The taller the grass, the more it helps shade and protects the root system.

3. Deeper roots

The taller the grass, the deeper the roots will be. This means it will have better drought resistance and will require less frequent watering. The tall leaf tissue and the root system will have moisture reserves making your lawn more tolerant of longer periods of drought.

Whether they last a few days or a few weeks, there will always be drought periods. Once they occur, you'll notice that some lawns will outperform others which is primarily due to their deep root system. If you follow this principle, your lawn could be one of those that outperform the others in the neighbourhood.

4. Weed control

The taller the grass, the better chance you have of avoiding weeds. The two best ways to fight against weeds is to have tall and thick grass. In general, weeds only come up in weak spots in the lawn, so if you mow your grass taller, the turf will adapt to increased heights and those week sports will fill in and become more dense and lush. Cutting your grass taller leaves less light for weed seeds to sprout and grow in the first place.