Why Fall is the Best Time to Overseed Your Lawn — And What to Do in Spring Instead

If your lawn is looking thin or patchy after a long winter, it’s natural to start thinking about overseeding. But when it comes to planting new grass seed in Indiana, timing is everything—and spring isn’t it.

Why You Should Wait to Overseed Until Fall

Overseeding can be a great way to thicken up your lawn and repair bare spots, but doing it in the spring often leads to disappointing results. That’s because young grass seedlings struggle to survive the intense heat and stress of summer.

In spring:

  • Soil temperatures may still be too cool for seed germination.
  • Pre-emergent weed controls (used to prevent crabgrass) can also prevent grass seed from sprouting.
  • New seedlings have little time to establish strong roots before facing drought, heat, disease, and heavy foot traffic in summer.

In contrast, fall offers the ideal conditions for seeding:

  • Warm soil + cooler air = perfect germination environment.
  • Less weed competition.
  • More consistent rainfall and milder temperatures.
  • Gives new grass time to establish strong roots before winter.

At Brooklawn, we recommend holding off on overseeding until late summer or early fall—when it truly counts.

What You Can Do in Spring: Liquid Aeration

While seeding can wait, aeration is something you can (and should!) do in spring—and Brooklawn offers the perfect solution with Spring Liquid Aeration.

Liquid vs. Core Aeration: What’s the Difference?

Liquid AerationCore Aeration
Uses a soil-loosening solution applied via sprayUses a mechanical machine to pull plugs of soil from the ground
No disruption to the lawn surfaceLeaves visible plugs on the lawn, in which new seed varieties will fall into these holes
Ideal in spring to loosen compacted soil and boost root developmentBest paired with fall overseeding to improve seed-to-soil contact
Covers the entire lawn evenlyAllows better airflow water and nutrients to the turfgrass roots

Liquid Aeration is perfect for spring because it improves water and nutrient absorption without disturbing your lawn’s surface. It sets your grass up for better growth heading into summer—especially if you plan to wait and seed in the fall.

Plan Ahead for a Stronger Lawn

If your lawn needs thickening or repair, we encourage you to wait until fall to overseed for the best results. In the meantime, Brooklawn’s Spring Liquid Aeration will get your soil in great shape, reduce compaction, and improve overall lawn health—making your fall overseeding even more successful.

Want to prep your lawn the right way this spring? Ask us about adding liquid aeration to your spring program. And when fall rolls around, we’ll be ready with core aeration and overseeding to finish the job right. Call us today at 888-794-9555 to get started.