Now Is the Time to Think About Fall Seeding for Your Lawn

If you’re in New England, August might feel early to talk about planting grass—but in reality, this is the perfect time to start planning your fall lawn project. Whether you’re looking to overseed thin patches or completely renovate your lawn, getting started now ensures you’ll have strong, healthy grass before frost sets in. In the an episode of The Paul Parent Garden Club podcast,Patrick Parent—product line manager for lawn and garden products at Mahoney’s—shares a step-by-step approach to getting your lawn ready for fall. Listen to the full podcast here  

Step 1: Decide on Your Approach

Take a close look at your lawn. Are you doing a full renovation because weeds have taken over, or just an overseeding to fill in bare areas? Make that decision now—your timing, prep work, and product choices will depend on it.  

Step 2: Understand Your Sun and Shade Conditions

Grass seed varieties perform differently depending on light:

• Full Sun: Kentucky bluegrass thrives here.
• Mixed Sun/Shade: A blend of bluegrass, ryegrass, and fescues works well.
• Shadier Spots: Stick with ryegrass and fescues, which tolerate less light.

  Check your lawn at different times of day to see where sun and shade fall. If your shady area seed mix contains a lot of bluegrass, choose something better suited for low light.    

Step 3: Test Your Soil Early

A soil test now means you’ll have results in time to make corrections before seeding. The University of Massachusetts Amherst offered comprehensive soil testing.

• Take 5 samples (4 corners and the center), 8–10 inches deep.
• Mix them in a bucket, let dry, and send them in for analysis.
• Test results will reveal pH and nutrient imbalances so you can apply products like fast-acting lime or gypsum before planting.
• Bring your results to your local Mahoney’s and we’re happy to make adjustment recommendations

  Correcting soil issues early gives your lawn the best start and lets you apply multiple treatments before winter.  

Step 4: Remove Weeds Before Seeding

Weed control products often require a waiting period before reseeding—anywhere from 7 to 14 days for most products, or even longer for total vegetation killers.

• Spray weeds in early to mid-August to allow time for control before seeding.
• After weeds die, remove the debris and prep the soil.

Step 5: Prepare and Seed

Once weeds are cleared and soil is corrected:

1. Loosen and level the soil—consider mixing compost with loam for added nutrients.
2. Apply starter fertilizer (instead of your regular August/September fertilizer).
3. Spread your grass seed evenly.
4. Water deeply—about 2 inches per week—preferably in the early morning.

  Grass seed takes 14–21 days to germinate (depending on variety), so working backwards from your area’s average frost date ensures enough time for establishment before cold weather. For more detailed information on fall seeding, check out Patrick’s tips for aeration, seeding, and soil care!  

Step 6: Follow Up with a Winterizer

About six weeks after seeding, apply a winterizer fertilizer to strengthen roots for the dormant season. This step helps your lawn green up faster in spring and improves drought resistance.  

Why Timing Matters

Starting in August might sound early, but the math makes sense:

• 2 weeks for soil testing or weed control waiting period
• 2–3 weeks for seed germination
• 4–6 weeks for root development before frost

  By planning now, you’ll give your lawn the best chance to develop a strong root system, resist weeds, and look lush next spring. Ready to dive deeper? Patrick shares even more timing tips, product recommendations, and seeding success strategies in the full episode. Listen to “Now Is the Time to Think About Fall Seeding for Your Lawn”