When to Mow Your Lawn in Spring: The Complete US Guide

Spring is finally here, and lawns across the US are beginning to wake up from their winter slumber. But knowing exactly when to mow lawn in spring can feel tricky. Cut too early, and you risk damaging the roots. Wait too long, and overgrown grass blades can make your job much harder.

In this article, we’ll explain everything you need to know about mowing your lawn in spring to ensure your yard stays lush, green, and healthy all season long.

When Should You Start Mowing Your Lawn in Spring

The first mow of spring varies depending on where you live and the local climate. The best time to mow your lawn is when the grass starts growing, when soil temperatures reach around 50°F, and when the ground is dry enough to support your weight without sinking.

Mowing your lawn in the North

When mowing your lawn in northern states such as Minnesota or New York, you’ll find cool-season grasses like Kentucky Bluegrass, Ryegrass, and Fine Fescue. These grass types often thrive in colder temperatures and begin growing when it’s still only 45°F. However, it’s important that you wait until the ground is a little warmer, as it can be harmful to mow your lawn when it’s still frosty. For this reason, you shouldn’t expect to have a mowable lawn until mid-to-late April, once the final risk of frost has passed.

Mowing your lawn in the South

In contrast, if you are mowing in a southern state like Texas or Florida, your lawn is likely full of warm-season grasses such as Bermuda, St. Augustine, or Zoysia. While these grass types require higher temperatures to wake up than their northern cousins, the Southern climate gets hotter much earlier in the year. As a result, these heat-loving grasses often require a first cut as early as March.

Mowing your lawn in the Central US

In transition-zone states like Tennessee or North Carolina, lawns may contain a mix of cool and warm-season grasses, meaning mowing season often begins in late March or early April depending on weather patterns.

Two Things to Check Before Your First Cut

The sun is shining and your neighbors have started their mowers, but don’t get too excited: your lawn might not be quite ready for its first spring trim. Before wrestling your clunky old lawn mower out of the shed and pulling the starter cord, there are two crucial things to check.

Soil firmness

Even lightweight lawn mowers can do long-term damage if you mow across grass that is still waterlogged from winter. To avoid grass breakage or soil compaction - the act of squishing the soil and blocking air, water, and nutrients from reaching the roots - do a quick ‘hand grab’ test.

Simply dig down a few inches and squeeze a handful of dirt in your fist. If it crumbles apart easily, your lawn is ready to be mowed. However, if the dirt retains its shape like a clay ball, it means the ground is still too wet for the first mowing session of the year.

Grass height

It’s really tempting to start cutting as soon as you see a flash of green, but the grass should reach a certain height before the first lawn mow of the year. This is because the blades need to be tall and strong to capture plenty of sunlight for growth after a long, dormant winter.

We usually recommend waiting until the grass is at least 3 inches tall before you mow your lawn this spring.

What Cutting Height for the First Mow of the Year?

Once your lawn has passed those two tests, the next challenge is selecting the perfect cutting height for the first mow of spring.

Aim high

Most homeowners make the mistake of cutting too short, too soon - which can leave your lawn stressed, weakened, and vulnerable to weeds. Instead, you should operate at the highest possible cutting height for the first cut. You can then gradually lower the blade height as the season progresses until you reach a height that suits your yard.

The ‘one-third’ rule

As a rule, you should never remove more than one-third of the total grass height in a single mowing session. In other words, if your grass is 3 inches tall, you should only be taking off 1 inch. Sticking to this golden rule of lawn mowing helps to keep the soil moisture levels high and the weed growth low.

How Often Should You Mow in Spring?

There isn’t a one-size-fits-all mowing frequency for US lawns, as it depends on growth rates, grass types, and rainfall. On average, however, lawns should be mowed every 7 to 10 days in early spring, with sessions increased as temperatures rise and growth rate increases.

The three biggest factors that affect how often you should mow in spring are:

Grass type

Northern, cool-season grasses (like Kentucky Bluegrass) often burst into life with a more aggressive growth spurt when spring arrives, as they thrive in colder temperatures. You’ll most likely need to trim the lawn every 5 to 7 days to keep up if you live in the North – but only when all signs of frost have melted.

On the other hand, warm-season grasses (like Bermuda) start slowly, but hit full speed when the humidity rises. At the start of the season, you might only need to mow these grass varieties every 10 to 14 days, but this will only increase as the months roll on and the thermostat rises.

Rainfall

Rainfall significantly increases how often you should mow in spring. For those experiencing heavy rain or frequent showers, your lawn’s growth rate will accelerate considerably. While it might be tempting to get the mower out as soon as the rain passes, you should wait until the lawn is dry to prevent clumping, tears, and uneven cuts.

Fertilizers and nutrients

If you’re applying a nitrogen-rich fertilizer, prepare to spend a little more time mowing this spring. Feeding your lawn provides all the essential nutrients to recover from winter dormancy, but it also acts as a fuel for rapid growth. Your mowing schedule will therefore need to be frequent and consistent.

Signs Your Lawn Is Ready for Its First Cut

The sun is shining and the birds are singing, so if you’re anything like us, you’re now asking yourself: “when can I cut my grass?” Before you run to the garage, go through this simple checklist:

·        Is the grass visibly growing?

·        Is the ground firm underfoot?

·        Has any frost been forecasted for the next 48 hours?

·        Has the grass grown more than 3 inches?

If the answer to each of these questions is “yes”, then it’s time to grab the mower and give the lawn a trim.

What Happens If You Mow Too Early?

Mowing the grass before it’s ready, or while the ground is still recovering from winter, can lead to several long-term issues.

Scalping

It might look mowable, but wet spring grass tends to tear easily. Ripping the grass too harshly or too unevenly when it’s still frosty leaves it at risk of ‘scalping’ - which is when you kill the plant by cutting it right down to the crown.

Soil compaction

In early spring, the ground is still full of frost and rain. When gardeners run a heavy mower on soft soil, they often squash the air pockets out of the dirt, which then prevents oxygen, water, and essential nutrients from reaching the grass roots. This can lead to poor growth and bare patches by mid-summer.

Root stress

During the transition from dormancy to growth, your lawn is channeling all its energy into building a strong root system. If you cut the grass too early, you force the plant to divert energy away from the roots to repair the wound at the top, which then results in short, shallow roots beneath the soil. 

Getting Your Mower Ready for Spring

You now know when to start mowing this spring, but what are you mowing the lawn with? Before you pull the mower out of the garage for its debut run, it’s worth spending a few minutes on maintenance.

How to sharpen your lawn mower blade

A dull blade is the last thing your lawn needs when early-season mowing, so make sure to check that it’s sharp and undamaged. A sharp blade has a precise, narrow edge, while a dull blade will have a thick, rounded edge. Equally, the blade might have visible chips or dents left from last year’s mowing, which could potentially stress your lawn.

Most modern lawn mowers, like the CLM50, have removable blades, so if yours looks blunt or damaged, you can simply swap it for a new one. Just make sure that the power source is disconnected and that you’re wearing protective gloves when handling or replacing blades.

How to check your lawn mower battery

If you’re using a cordless mower, check the battery terminals for any dust or debris build-up, and wipe them down with a dry cloth. Your lawn mower may have been stored in dry, cool conditions, but it’s important to give the battery a full charge cycle so that it’s ready for your first mowing session of the year.

How to set your blade cutting height

Before you get started, place your mower on a flat driveway or sidewalk, and manually adjust your mower’s cutting height to its highest possible setting. This will prevent scalping and minimize stress on grass that’s only just waking up to spring.

Complete Your Spring Garden: Beyond the First Mow

Once your lawn care routine is underway, having the right tools can make spring maintenance faster and far less physically demanding. For homeowners looking for tech that takes the hard work out of your lawn, we have the perfect three-tool spring reset for you.

The CLM50 Cordless Lawn Mower

The CLM50 is the perfect lawn mower for the first cut of spring. With a push-button start, six different height settings, and 40 minutes of runtime, the CLM50 is a cordless lightweight mower that is both kind to your body and your garden.

The GT50 Grass Edge Trimmer

To achieve crisp lines along your flowerbeds, walls, and driveway, the GT50 is the ideal partner for your lawn mower. Functioning as both a grass trimmer and edger in one, it allows you to instantly tackle overgrown edges and borders after you’ve finished mowing. 

Lightweight and easy to maneuver, the GT50 takes care of the trickiest spots with ease.

The HT50 Hedge Trimmer

Alongside lawn maintenance, you’ll soon have to worry about cutting your hedges this spring too. The HT50 is a lightweight, long-reach hedge trimmer that neatly cuts high hedges without the need for a stepladder. It’s cordless, powerful, and capable of tackling branches that are 1-inch thick, making it an essential for tidy tree lines.