Learning Center / Timing and seasons
Why is fall the most important season for your lawn?
Because tall fescue does its real growing in fall. Feeding, aeration and overseeding done now decide how thick the lawn is next spring, and keeping the leaves off protects all of it.
- By David Obeid, founder
- Reviewed
- 5 min read
The short answer
Why does fall matter more than spring?
Cool-season grass recovers and grows in fall: warm soil, cooler air, steadier rain and fewer weeds. Work done now builds roots and density, while spring work mostly maintains what is already there.
Fall is also when summer damage gets repaired. Thin spots, disease patches and scalped areas don't fill in on their own in fescue, so this is the season to rebuild them.
The fall calendar
What happens in the lawn from August to December?
This is how we time the fall work for Northern Virginia lawns.
| When | What | Why |
|---|---|---|
| Mid-August to mid-September | The first big fall feeding | Fescue starts growing again as the heat breaks |
| Mid-September into October | Core aeration and overseeding | Warm soil and cooler air are ideal for new seed |
| October and November | The second fall feeding | Builds roots and density you see next spring |
| Late October to early January | Leaf cleanup: two visits and a touch-up | Keeps leaves from smothering the lawn and new seed |
| Late season | Last mows at about 3 to 3 1/2 inches | A long lawn traps leaves and debris going into winter |
Aeration and seed
Should you aerate and overseed every fall?
For most fescue lawns on Northern Virginia's clay, yes. Core aeration pulls plugs out of compacted soil so air, water and roots can move again, and overseeding fills the thin spots that fescue can't fill on its own.
New seed needs to stay moist for about two to three weeks. For thin areas with hard clay, compost topdressing added with the seeding gives new roots a better start. More on aeration timing.
The rest of the fall list
What else should you do in fall?
-
Keep the leaves off
A wet mat of leaves blocks light and holds moisture against the grass. Why leaves need to come off.
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Keep watering new seed
Fall can be dry. New seed needs light, frequent watering, and an established lawn still needs about an inch a week until it cools down.
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Lower the last few mows
Bring the mower down to about 3 to 3 1/2 inches for the last mows, never scalped. Here is why.
-
Shut off irrigation before a hard freeze
Drain or winterize sprinkler lines so they don't crack.
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Don't worry about crabgrass now
Crabgrass is an annual and dies with the first frost. Plan to prevent it next spring instead.
Related questions
What people also ask
When is the best time to aerate and overseed?
For the tall fescue lawns common here, roughly mid-September into October. We offer aeration and seed from August through October to hit that window.
When should I fertilize in the fall?
The prime applications fall roughly between mid-August and mid-September and again in October and November, when cool-season grass is actively growing.
When does fall leaf cleanup happen?
From late October into early January: two cleanups and a touch-up, with the leaves hauled away.
How much does aeration and overseeding cost?
Standalone aeration and seed starts at $279 and is available August through October. It is also included in the Timesaver and Lifesaver plans.
Keep reading
More from the Learning Center
- What should you do for your lawn each season in Northern Virginia? A season-by-season lawn calendar for tall fescue: what happens in winter, spring, summer and fall, and which season matters most. Timing and seasons · 6 min read
- Why shouldn't you leave leaves on your lawn all winter? What a wet mat of leaves does to a fescue lawn, why beds and walkways need clearing too, and why one cleanup in November is not enough here. Timing and seasons · 5 min read
- Should you mow your lawn shorter before winter? Why the last mows of the season should drop to about 3 to 3 1/2 inches: a long lawn traps leaves and debris over winter. Lower, never scalped. Timing and seasons · 4 min read
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