Spring in Indiana can be unpredictable. One week it's 70 degrees and sunny, the next you're scraping frost off the windshield. But somewhere in that transition, your lawn is waking up — and the work you put in during these first few weeks will determine how it looks all summer long. Here's a step-by-step checklist to help you get it right.
1. Clean Up Winter Debris
Before you do anything else, walk your property and clear away fallen branches, leaves, trash, and any other debris that accumulated over the winter. Matted leaves and sticks block sunlight and trap moisture against the turf, which creates a perfect environment for snow mold and other fungal diseases.
Pay special attention to areas along fences, around trees, and near the foundation of your home where debris tends to pile up. A good leaf rake works well for this — it's gentle enough to avoid tearing up grass that's just starting to wake up.
2. Know When to Start Mowing
Don't rush to fire up the mower just because you see green. Wait until your grass is actively growing and has reached about 3 to 3.5 inches in height. In most of east-central Indiana, this usually happens between mid-March and mid-April, depending on the year.
Equally important: make sure the ground is firm enough to mow on. If you're leaving footprints when you walk across the yard, it's too wet. Mowing on saturated soil compacts it and damages the root zone, setting your lawn back before the season even starts.
3. Apply Pre-Emergent Weed Control
Timing is everything with pre-emergent herbicides. These products work by forming a barrier in the top layer of soil that prevents weed seeds — particularly crabgrass — from germinating. But they have to go down before those seeds start sprouting.
The rule of thumb in Indiana is to apply pre-emergent when soil temperatures reach 55°F for several consecutive days. This typically falls in late March to mid-April, right around the time forsythia bushes start blooming (a handy natural indicator). If you wait too long and crabgrass has already emerged, a pre-emergent won't help — you'll need a post-emergent treatment instead.
4. Test Your Soil
If you haven't tested your soil in the past two to three years, spring is a great time to do it. A basic soil test will tell you your soil's pH level and nutrient content, which takes the guesswork out of fertilizing.
Indiana soils tend to run slightly acidic in some areas and slightly alkaline in others. If your pH is off, your lawn can't efficiently absorb nutrients no matter how much fertilizer you apply. Your local Purdue Extension office can process a soil test for a few dollars, or you can pick up a kit from most garden centers.
5. Consider Core Aeration
If your lawn gets heavy foot traffic, has clay-heavy soil (common in our part of Indiana), or just feels hard and compacted, spring aeration can help. Core aeration pulls small plugs of soil out of the ground, relieving compaction and allowing air, water, and nutrients to reach the root zone more effectively.
That said, fall is generally the best time for aeration in Indiana because it pairs well with overseeding. If you aerate in spring, avoid doing it right after applying a pre-emergent — aeration breaks up that protective barrier and reduces its effectiveness. Time these two tasks carefully, or do one in spring and the other in fall.
6. Overseed Bare and Thin Spots
Winter can leave behind bare patches, thin areas, or spots where snow mold killed off grass. Spring is a decent window for spot-seeding these trouble areas, though you'll need to keep in mind that pre-emergent herbicides will also prevent grass seed from germinating.
If you have significant bare spots that need seeding, you have two options: skip the pre-emergent in those specific areas and plan to manage weeds manually, or focus your overseeding efforts in the fall when pre-emergent isn't a factor. For small bare patches, a targeted approach with starter fertilizer and consistent watering can fill things in nicely.
7. Get on a Fertilizer Schedule
Indiana's cool-season grasses benefit most from a fertilizer program that includes applications in early spring, late spring, early fall, and late fall. The early spring application should be a lighter feeding — think of it as a wake-up call for the lawn, not a heavy meal.
A balanced slow-release fertilizer applied in April or early May is a good starting point. Avoid heavy nitrogen applications in early spring, as this pushes excessive top growth at the expense of root development. Save your heaviest feeding for the fall, when cool-season grasses are naturally putting energy into root growth and thickening up.
- Early spring (April): Light feeding with balanced fertilizer
- Late spring (May–June): Second application, slow-release nitrogen
- Early fall (September): Heavier feeding to support recovery and root growth
- Late fall (November): Winterizer application before dormancy
8. Sharpen Your Mower Blades
This one gets overlooked constantly, but it matters more than most people think. Dull blades tear the grass rather than cutting it cleanly, leaving ragged edges that turn brown and make the lawn look dull. Those torn tips are also more susceptible to disease. Sharpen your blades before the first mow of the season and again every 25 hours of mowing time.
Let Us Handle the Checklist
If this list feels like a lot — it is. Lawn care done right takes knowledge, timing, and consistent effort. That's exactly what our team provides. All Brothers Lawn Squad offers complete spring lawn care programs for homeowners across east-central Indiana, from debris cleanup and mowing to fertilization and weed control.
Ready to get your lawn on track for the season? Get a free quote or call us at (765) 371-4186.