Save Money, Save The World - Mow Less

I wrote this for the Treenex site a few weeks ago.

Mowing season has been longer in the North East US because of a cool, wet month of June. Mowing is at least a twice weekly chore – still! Who has that kind of time? Well, there are many ways you can reduce the amount and the frequency you mow.

Why is this important? There are at least 2 reasons and they both revolve around the air we breathe.

Emissions

If you use a gas powered mower of any kind, you’re emissions for the time you mow equal those of at least 4 cars idling in your driveway. Riding mowers emit more than push mowers, by volume mowed. This means even if you finish sooner, you’ve still emitted more COx’s, NOx’s, and SOx’s. Ew! And since the small engines are just starting to be regulated for emission control, it will be more than a decade until reduced emission models are common place.

Carbon Sequestration and Air Filtration

Because mowing grass less often means fewer emissions, it means the grass is allowed to do more to filter and use carbon that is already in the air. I’ll cover more on this very soon.

How To Mow Less (Before)

Set your mower up higher
By setting your mower to 3″ (7.5 cm) or more, you more rapidly achieve the above mentioned goals.

Healthier grass is longer grass.
Longer grass is able to retain moisture better by shading its roots and having a more complex root system. Generally speaking, the longer the grass blade, the longer the root. So not only is there less evaporation (not what the blades give off, but what is directly evaporated by the sun and breeze), the grass has a chance to reach for more water that is deeper in the soil. You’ll have less irrigating to do and your grass will still be green during periods of drought. Longer grass also hinders weeds from getting a foot hold since the shade is so dense. This doesn’t allow for adequate sunlight to reach seeds or seedlings. All of these things make it so fewer chemicals are necessary for a green thick carpet of grass.

Less Frequent Mowings
Grasses that are typically chosen for lawns have a short mature length. This means they won’t grow to be a 3 foot tall stem of grass if left to its own devices. As they approach their mature length, they naturally slow their growth rate. By allowing the grass to stay longer like this, the more slowly it will strive to achieve its mature length/height. This results in needing to mow less frequently.

Longer grass also means an increase in photosynthesis and air filtration. The more green volume you have, the more filtration of dust and small particles occurs and the more photosynthesis occurs. Carbon dioxide is converted to plant nutrients with oxygen released as a by-product. Having an increase in green volume means you have an increase in carbon utilization and oxygen production.

Say your grass length is generally 2 1/2″ inches (6 1/4 cm) and your lawn is 25′x30′ (7.6 m x 9.1m). Changing from that 2 1/2″ to 3″ doesn’t seem like a huge change, does it? Well, when you calculate the green volume (length x width x height), you’ll find that you’re adding a huge sum! It would be as if you’re adding another 250 square feet of 2 1/2″ grass to your lawn! All for free and no added effort!

Increase Your Speed
By increasing the speed with which you mow, you decrease the amount of time the engine is running, reducing emissions. Most mowers have various speeds to move, so find one that is just slightly uncomfortably fast.

Change Your Pattern
By changing how you mow, you will spend less time mowing as well. If you have large areas to mow, mow in a spiral. This virtually eliminates the need to stop and turn, which makes mowing more efficient and faster for you! If you have smaller areas, choose the angle that allows you the longest distance between turns. It isn’t quite as efficient as spiral mowing, but it works very well.

Reduce engine speed.
Most engines also have a variable speed factor to them. Play with this a bit, but mow at the lowest possible engine speed. This will also reduce emissions (in theory – older engines often run cleanest at their highest setting).

Reduce The Amount Of Space Mowed (after)
By creating unmown spaces – not decks or walks or impervious ground covers – you decrease the need to mow, decreasing emissions. By making areas into garden spaces, you are also significantly increasing filtration rates. Microbes in the soil do massive amounts of filtration on air born chemicals. They also do quite a bit for carbon sequestration. So, between the open soil space and the perennial plants you place in there, you are increasing photosynthesis and air filtration.
And as I alway say, the less I mow, the less I mow! LOL I’d far rather spend time looking at my flower beds than sweating behind a mower.

Results
In the last 5 years, I have focused on reducing the amount of mowing our property requires. I have reduced it by at least 1/3, and more likely 1/2 by increasing the number and space of flower beds, raising the height on the mower and reducing the number of times I mow different areas. Drought prone areas are mown 1/2 as often as the more rapidly growing areas. Rather than mow for an hour each time, I’m mowing for 20-30 minutes. People rave about the flower beds and I get to sit on my deck and watch the bees and hummingbirds do their job!

As you can see, it takes time and a small amount of effort, but doing so actually reduces your efforts substantially AND helps the environment. How much better can it get?