Boston winters can be very slow to end, but when they do, you might be tempted to rush out there on the first warm Saturday. Don’t do it. Walking on soggy soil during our famous mud season destroys the grass sleeping underneath. Wait until the ground dries out.
Follow these 10 Spring Lawn Care Tips to get your lawn ready for summer in Boston:
1. Prepare your lawn mower
Use March — our muddy downtime in Boston —to prepare your lawn mower and other lawn care equipment for mowing season.
- Sharpen mower blades; this prevents torn grass.
- Change your lawn mower’s oil according to the manufacturer’s specs, typically every 20 to 50 hours of seasonal use.
- Replace or clean the air filter on all gas-powered equipment to ensure proper engine function.
- Install a fresh spark plug in your lawn mower for reliable starting and consistent performance.
- Drain old fuel from gas equipment and refill with fresh gasoline before the season starts.
- Inspect all fasteners and bolts for tightness to prevent equipment damage during operation.
- Test battery levels on electric lawn mowers and string trimmers and charge fully before first use of the season.
Read more: Best Lawn Mower Maintenance Practices
2. Clean up winter debris
Next, in mid-April, clear your lawn of the mess left by Boston’s nor’easters. It is important to wait until the ground is dry; raking soggy soil will rip up healthy grass and compact the soil.
Cleaning up your lawn now prevents snow mold and clears the way for sunlight to reach your awakening grass.
- Rake away dead leaves and thatch: Remove matted layers to prevent fungal disease and turf smothering.
- Clear fallen branches and litter: Winter winds deposit sticks and street trash that can ruin lawn mower blades.
- Flush salt-damaged areas: Soak grass near sidewalks with water to dilute road salt from plows.
Good to know: According to Boston.gov, curbside yard waste collection usually resumes in April; check your local schedule before bagging.
3. Test your soil, if needed
Early spring is your critical second chance to test your soil (if you didn’t do this in fall). Our native New England soil is naturally acidic, often requiring limestone to balance pH. Furthermore, yards in older neighborhoods frequently contain elevated lead levels from historic exterior paint.
You should test your soil as soon as the mud dries enough to crumble — typically early April. This gives you time to adjust soil nutrients before the summer heat hits.
- Check pH levels: Acidic soil blocks nutrient absorption; lime applications need time to fully activate.
- Screen for lead: Essential for safety in urban yards, especially those near pre-1978 homes and other buildings.
- Target nutrients: Avoid wasting money on unnecessary fertilizers that pollute the Charles River watershed.
Good to know: The UMass Amherst Extension is the official soil testing body for the state; request their “Routine Soil Analysis,” which includes a lead screen.
Read more:
How to Soil Test Your Lawn
How to Read a Soil Test Report
4. Get rid of lawn diseases
Boston’s cold, damp spring transitions create the perfect breeding ground for fungal diseases. Scout your lawn from mid-April through May, as ignoring early signs of lawn diseases can lead to thinning grass before summer even begins.
Most springtime lawn disease infections in our region are cosmetic and managed with lawn care adjustments rather than chemicals:
- Snow mold: Appears as matted gray or pink circles immediately after snow piles melt. Snow mold will typically go away on its own, but it is helpful to rake some of the snow mold away.
- Red thread: Appears in late spring (May) as pink, web-like threads during cool, wet periods. Red thread often indicates low nitrogen levels; a light fertilizer application usually clears it up.
- Leaf spot: Active during cool, wet April weather, this lawn disease causes purple-to-brown spots on blades. Prevent leaf spot by raising your mower height and never watering in the evening.
Read more: How to Identify and Treat Grass Fungus
5. Prevent weeds
Weeds steal water and nutrients from your struggling spring grass. You must act before late-spring warmth triggers widespread germination.
Watch for these common spring weeds found in Boston lawns:
- Crabgrass: A coarse, lime-green annual. Apply pre-emergent herbicides when the soil temperature at a 2-inch depth consistently reaches 55 degrees (typically late April to early May in Massachusetts, around the time forsythia blooms end).
- Dandelion: Yellow-flowered perennials with deep taproots; dandelions emerge in early spring through summer. Spot-treat young plants with broadleaf herbicide in May or dig them out completely by hand.
- Common chickweed: A mat-forming winter annual weed with small white stars. Apply pre-emergent herbicide in fall (August to September) or post-emergent herbicidet in early spring (April) before plants set seed.
6. Control spring grubs
Spring grubs emerge as soil temperatures warm, threatening to devastate your Boston lawn before summer even arrives. These cream-colored Japanese beetle larvae feed on grass roots, creating dead patches and weakening your grass.
White grubs — distinguishable by their C-shape and brown heads — are the primary threat here. Monitor your grass starting mid-April by cutting three sides of a sod square and peeling it back to inspect the roots.
If you count more than 10 grubs per square foot, apply a curative insecticide or milky spore between April 15 and May 10 to save your lawn.
Read more:
Common Spring Lawn Pests
Guide to Using Pesticides on Your Lawn
7. Fertilize, if necessary
If you want to fertilize your lawn only once a year, fall is the best time. However, if your cool-season grass took a beating during the winter, a spring boost can help, but timing is everything.
Warning: Before buying any bag, you must verify your soil test results. Under Massachusetts law, you cannot apply phosphorus (the middle number on the bag) unless your soil test confirms a deficiency.
For Boston’s cool-season grasses (like Kentucky bluegrass or fescue), aim to fertilize:
- Late May (Memorial Day): Apply slow-release nitrogen to sustain green color without forcing surge growth that weakens roots.
- Early September (Labor Day): This vital application repairs summer damage and fuels deep root growth for winter hardiness.
- Late November (Thanksgiving): Apply a final feeding after top growth stops to store energy for early spring green-up.
Good to know: If you have a warm-season grass, like Zoysia, wait until your lawn is 100% green; feeding earlier in Boston only fuels cool-season weeds.
Read more: How to Fertilize Your Lawn
8. Check sprinklers and start watering
Boston’s spring rains are usually enough, so wait to water until late May. Only start when your grass shows stress, like footprints that don’t bounce back. Aim for just 1 inch of water per week — combining rain and sprinklers. Watering earlier causes weak roots that fail in summer heat.
However, you should turn your system on for a quick “test run” after the last frost, which is typically between late April and mid-May.
Here’s what to do:
- Find your sprinkler system’s main panel and turn on the manual settings.
- Ensure your backflow preventer is tightly shut.
- Locate the sprinkler valve and close it.
- Look for damaged sprinkler heads and ruptured water lines.
- Slowly open the main valve, waiting a few minutes to let the water run before opening it more. Repeat until fully open.
- With a branched irrigation system, repeat the process for each section of the sprinkler array.
- Check for areas with low pressure, odd sprinkler patterns, or other unusual conditions.
- Set your sprinkler timer and settings for the current needs of your lawn and landscape.
*Note: Always check your user manual for directions specific to your sprinkler system.
Read more: How to Adjust Sprinkler Heads
9. Know when to mow
Your lawn is ready for its first spring mowing when the grass is about 3 to 4 inches tall, and the soil is no longer soggy. In Boston, this usually happens in late April or early May, once the days warm up to 60 degrees. Remember, cutting too early damages new growth.
When you do mow, follow the one-third rule: Never cut off more than one-third of the grass blade in a single mowing.
Once you start mowing regularly, cut your grass about once a week during spring. Keep your cool-season grass around 3 inches high. This height helps grass grow deep roots, blocks weeds from sunlight, and makes your lawn stronger for summer heat.
Read more: 5 Best Grass Types for Boston
10. Wait to dethatch, aerate, and overseed
It is tempting to fix a messy lawn in early spring, but big renovations are risky during a Boston spring.
For most local lawns (cool-season grasses like Kentucky bluegrass), digging up your yard during spring helps weeds grow, and the new grass often dies in the July heat. Generally, you should wait until late summer or early fall for major overhauls.
However, there are exceptions:
- Dethatching: Dethatch in May to June if thatch exceeds ½ inch thick, restricting water and nutrients, but wait until the soil dries from the mud season.
- Aeration: Relieve soil compaction common in urban yards to boost oxygen flow. Wait for temperatures to stay consistently above 55 to 60 degrees (late May).
- Overseeding: Overseed cool-season grasses when soil temperatures consistently reach 50 to 65 degrees (early April through mid-May). Zoysiagrass can be overseeded between March and July, since it better tolerates warm temperatures.
Note: If you have a warm-season grass (like Zoysia), wait until it fully greens up in late May or June to perform these tasks.
Read more:
Why, When, and How to Aerate Your Lawn
When to Plant Grass Seed Massachusetts
Lawn Care Calendar for Massachusetts
Too busy for lawn care? Hire a Lawn Love pro
Make yard work feel less overwhelming by getting a head start on your spring lawn care plan. Our spring lawn care tips for Boston should help. If you put the time and energy into maintaining your equipment and learning how to manage your lawn
However, you can skip the hard labor entirely and enjoy your weekends instead. Lawn Love’s Boston lawn care pros make it easy to get a beautiful lawn without all the work.
Read next: Massachusetts Growing Zones
Main Image: Lawn mowed by a Lawn Love pro in Boston. Illustration by Amy Stenglein / Lawn Love
Related Posts:
