Your lawn is waking up fast this month—and so are the weeds, pests, and problems if you don’t act now.
May in Johnson County is the tipping point for lawn health. What you do over the next few weeks will directly affect how your lawn handles the intense Kansas summer. Whether you’re managing cool-season grasses or just tired of seeing patchy spots in your yard, this is the month to take action.
We’ve put together the essential checklist for lawn care in May—complete with tips on mowing, watering, fertilizing, and more—to help you get the lush, green yard you deserve.
Why May Is a Critical Month for Lawn Care
Cool-season grasses like tall fescue and Kentucky bluegrass are growing rapidly in May. That means it’s the perfect time to reinforce root systems, thicken your turf, and strengthen your lawn’s defenses against heat, drought, and disease.
Miss this window, and your yard might struggle to survive the summer.
Set Your Mower Higher
One of the biggest mistakes we see is mowing too short. Set your mower height between 4-5 inches. Taller grass shades the soil, helps retain moisture, and suppresses weeds naturally.
Try to mow once or twice a week, depending on how fast your lawn is growing. And always follow the one-third rule: never remove more than one-third of the grass blade in a single mow. This keeps your lawn from becoming stressed or scalped.
Keep mower blades sharp! Dull blades tear the grass, leaving it vulnerable to pests and disease.
Water Smart—Not Just Often
Your lawn needs about one inch of water per week in May, including rainfall. That might sound like a lot, but it’s better to water deeply once or twice a week than to sprinkle lightly every day.
Early mornings are the best time to water. You’ll lose less moisture to evaporation, and your lawn will dry out by evening—reducing the risk of disease.
Need a quick check? Place a shallow container in your yard while watering. When it fills to an inch, you’re good.
Fertilize (But Only If You’re Committed to Watering)
Fertilizing in May can really boost your lawn’s health—but only if you’re also planning to water regularly all summer. If not, you could do more harm than good.
Use a balanced, slow-release fertilizer. It should include nitrogen to promote growth, potassium for root strength, and phosphorus (only if needed, based on a soil test).
Fertilization should align with your lawn’s current condition. If you’re unsure, reach out to us—we can help tailor a plan based on your soil and turf type.
Watch for Weeds—and Stop Them Early
May is prime time for broadleaf weeds like dandelions and clover. These weeds are best tackled early before they go to seed and multiply.
Use a targeted post-emergent herbicide, or explore organic alternatives that are safe for kids and pets. Either way, spot-treat where possible instead of broadcasting product over your entire lawn.
A thick, healthy lawn naturally prevents weeds by blocking out light and crowding out competitors—another reason consistent care this month pays off.
Aeration and Overseeding: A Strategic Option
The best time to aerate your lawn is the the fall, so we wouldn’t recommend this treatment now. However, it’s an important part of a healthy lawn.
Core aeration opens up the soil, allowing water, nutrients, and oxygen to reach the roots. This is especially helpful in Johnson County’s heavy clay soils.
Overseeding can help fill bare spots, improve turf density, and increase resistance to disease. Just make sure you keep the soil consistently moist for 2–3 weeks after seeding to ensure proper germination. For help, explore our aeration services.
Look Out for Grubs and Lawn Diseases
Grubs love the warming soil. Left untreated, they can chew through grassroots and leave ugly brown patches.
Check for them by lifting a small section of turf. If you find more than five grubs per square foot, it’s time to take action. We offer proactive grub control treatments that stop the problem before it spreads.
Also be on the lookout for lawn diseases like brown patch or dollar spot. These typically show up as discolored or thinning areas. Good mowing and watering habits are your first line of defense.
Mulch and Edge for a Cleaner Look
Fresh mulch not only makes beds look clean and defined—it helps your landscape retain moisture and suppress weeds.
Keep mulch around 2–3 inches deep and avoid piling it against tree trunks. While you’re at it, sharpen your bed edges with a spade or half-moon edger for a crisp, clean look that really boosts curb appeal.
Maintain Your Equipment
Don’t wait until your mower breaks down. May is a good time to check everything—spark plugs, filters, oil, belts, and blades.
Maintaining your tools helps them run more efficiently and gives your lawn better results every time you mow.
Let Us Help You Get It Right
We know every lawn is different—and we know Johnson County’s weather and soil conditions inside and out. Whether you’re looking for help with fertilization, pest prevention, or a total lawn care plan, our team is here to make your yard the best-looking one on the block.
Contact us today and we’ll create a customized May lawn care plan tailored to your property and budget.
Frequently Asked Questions
How often should I mow in May?
Most Johnson County lawns need mowing 1–2 times per week. Keep your mower height between 4 and 5 inches and follow the one-third rule to avoid stress.
When’s the best time to water?
Early morning, before 10 a.m., is ideal. It gives the grass time to dry out during the day, reducing disease risk and saving water.
Is it safe to fertilize in May?
Yes—but only if you plan to water consistently through the summer. A slow-release fertilizer works best for steady, healthy growth.
What’s the best way to control weeds in May?
Spot-treat visible weeds with a selective herbicide or use organic alternatives. Keeping your grass thick and tall will naturally suppress new weed growth.
Should I aerate now or wait until fall?
Fall is ideal, but if your lawn is compacted or patchy, May can still be a good time—especially if followed with proper watering. Our team can help you determine what’s best for your yard.
