Editor's Note: This story originally appeared on LawnStarter.
A well-planned seasonal lawn care schedule keeps your grass vibrant year-round. Whether you’re growing cool-season or warm-season grass, timing tasks correctly makes the difference between a lush, green lawn and a patchy, struggling yard.
Keep reading for a month-by-month schedule that keeps you on track for mowing, fertilizing, aerating, and treating your lawn at the optimal times for your grass type and climate.
Monthly Lawn Care Tasks
While this calendar provides a solid general guideline, the timing of specific tasks can fluctuate by several weeks depending on your location. Always consult your local Cooperative Extension office for recommendations specific to your region.
Month
Cool-Season Grasses
Warm-Season Grasses
January
Avoid foot traffic on frozen grass
Don’t pile snow on grass
Keep lawn clear of debris
Minimize foot traffic
Keep free of debris
Water if needed
February
Service equipment
Service equipment
Water if needed
March
Begin mowing if needed
Rake debris & snow mold
Apply pre-emergent
Apply pre-emergent
April
Dethatch
Core aerate
Overseed
Apply spring fertilizer
Increase mowing frequency
Treat weeds
Begin regular mowing
Apply spring fertilizer
May
Regular mowing
Water as needed
Regular mowing
Increase watering
Treat weeds
Dethatch
Core aerate
Overseed
June
Raise mowing height
Water deeply
Monitor for pests
Regular mowing
Water deeply
Fertilize
July
Mow higher
Water deeply
Treat for grubs and chinch bugs
Regular mowing
Maintain watering schedule
Treat pests
August
Mow higher
Water deeply
Monitor for diseases
Regular mowing
Continue watering
Monitor for diseases
September
Resume normal mowing height
Apply fall fertilizer and lime
Core aerate
Overseed
Apply pre-emergent
Regular mowing
Apply fertilizer
October
Regular mowing
Rake leaves
Treat weeds
Overseed with cool-season grasses
Reduce mowing
Reduce watering
November
Final mowing
Apply winterizer fertilizer
Winterize sprinkler system
Clean up leaves
Final mowing
Winterize sprinkler system
Clean up leaves
December
Keep lawn clear of debris
Avoid foot traffic on frozen grass
Don’t pile snow on grass
Minimize foot traffic
Keep free of debris
Water if needed
How Grass Type Affects Your Lawn Care Schedule
Before diving into monthly tasks, it’s essential to identify whether you have cool-season or warm-season grass, as this determines when your lawn is actively growing and when it needs the most attention.
Cool-season grasses like Kentucky bluegrass, tall fescue, and perennial ryegrass thrive in temperatures between 60 and 75 degrees. Typically found in northern climates, spring and fall are their peak growing seasons. During hot summer months, these grasses slow down significantly and may even go dormant to conserve energy.
Warm-season grasses such as Bermuda, St. Augustine, and Zoysia prefer temperatures between 80 and 95 degrees and hit their growth stride during summer. These grasses are typically found in southern states. They go dormant and turn brown when temperatures drop below 50 to 55 degrees in fall.
These different growth patterns mean your grass type dictates when to fertilize, overseed, aerate, and tackle other major lawn care tasks. Knowing your grass type ensures you’re working with your lawn’s natural rhythms rather than against them.
Spring Lawn Care: March, April, May
For cool-season grasses, spring is one of their two peak growing seasons.
- March is the time to rake away winter debris and snow mold, assess damage, and prepare for active growth.
- The best time to apply a pre-emergent herbicide is when soil temperatures reach 50 to 55 degrees to prevent crabgrass and other annual weeds from sprouting. Begin mowing when the grass is 3 to 4 inches tall, following the one-third rule.
- Mid-April is ideal for the first fertilizer application, as your grass is actively growing and can use nutrients.
- Spot-treat weeds with a post-emergent herbicide as they emerge.
- While fall is best, you can also core aerate and dethatch your lawn, and overseed thin or bare patches.
- In May, continue with regular mowing (at the best mowing height for your species), watering as needed, and aerate if you didn’t hit the April window.
Warm-season grasses remain dormant through early spring, slowly greening up as the thermometer climbs upwards of 65 degrees.
- Late March or April is the perfect time to apply a pre-emergent herbicide.
- As April progresses, your lawn is growing vigorously enough to need its first fertilizer application, regular mowing, and increased watering as temperatures rise.
- Once soil temperatures reach 65 degrees, you can dethatch and core aerate. It’s also a perfect time to put down grass seed to repair any thin or bare spots.
Summer Lawn Care: June, July, August
Cool-season lawns struggle with the heat and often go semi-dormant. They need a defensive strategy during the summer rather than support for active growth.
- Raise your mower height by at least a half inch. Letting the blades grow a little longer helps to shade the roots and retain soil moisture.
- Water your summer lawn deeply, but infrequently. Aim for 1 to 1.5 inches per week in one or two sessions.
- Hold off on fertilization, as excess nitrogen can burn your lawn.
- Monitor for signs of grubs and chinch bugs and treat as necessary.
Warm-season grasses thrive in hot conditions and require peak maintenance.
- Mow once or twice per week during June and July.
- In June, apply a nitrogen-rich fertilizer monthly or use a slow-release fertilizer.
- Water consistently, providing 1 to 1.5 inches per week.
- Core aerate in July or August, as your lawn will recover quickly in the heat.
- Watch for common lawn diseases triggered by the heat and humidity, and treat promptly with appropriate fungicides.
Fall Lawn Care: September, October, November
Cool-season grasses are undergoing their second growth surge of the season as lower temperatures and increased moisture create ideal growing conditions. The grass is also preparing for winter dormancy.
- Continue regular mowing through October, gradually lowering your blade back to the recommended height.
- September is the best month for core aerating and overseeding. The soil is still warm enough for germination, but cooler air temperatures and increased rainfall help keep the soil moist.
- When soil temperatures drop below 70 degrees, apply a pre-emergent herbicide to treat common winter weeds before they sprout.
- 6 to 8 weeks before the first frost (when soil temperatures are below 65 degrees), apply a fall fertilizer with a higher nitrogen content.
- Use a soil test kit to check soil pH and nutrient levels. Apply lime if needed.
- Spot treat any remaining weeds, as herbicides work well when weeds are actively transferring resources to their roots for winter.
- Apply a winterizer fertilizer with higher potassium in October (2 to 3 weeks before the ground freezes) to strengthen grass for cold weather.
- In late October or November, mow the final time. Paul Koch at the University of Wisconsin-Madison says it isn’t necessary to cut your grass shorter than normal before fall. There isn’t evidence that a shorter mowing reduces snow mold, and cutting the grass too short causes problems in the spring: It “will (make it) look thinner with more bare soil present, which is vulnerable to weed development.”
- Winterize your sprinkler system and clean up fallen leaves.
Warm-season grasses begin slowing down as temperatures drop.
- In September, reduce fertilization. The last application should be 6 to 8 weeks before your first expected frost when soil temperatures are 65 to 75 degrees.
- Use a soil test kit to check nitrogen, potassium, phosphorus, and soil pH. Apply lime if needed.
- In October, overseed with a cool-season species like ryegrass for winter color.
- Continue mowing as needed through October, but less frequently.
- Come November, mow for the last time, winterize your sprinkler system, and clear leaves and debris from the lawn.
Winter Lawn Care: December, January, February
Cool-season grasses go dormant, and growth slows, but they’re still alive beneath the soil surface. Your primary job is protection.
- Keep lawns clear of leaves and debris that can cause dead patches.
- Avoid walking on frozen grass to prevent damage to the blades or soil compaction.
- Try not to pile snow from the driveway or sidewalk onto your lawn to prevent salt damage and soil compaction.
- Service your lawn care equipment if you didn’t already.
Warm-season grasses are fully dormant and have likely gone brown for the winter. They require minimal maintenance.
- Minimize foot traffic to prevent crown damage.
- Keep the lawn free of debris, leaves, and branches.
- Water once or twice a month, if needed, when temperatures are above 40 degrees.
- Maintain lawn care equipment if you haven’t already.
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