Learning Center / Timing and seasons
What should you do for your lawn each season?
For the tall fescue lawns across Northern Virginia: prevent weeds and go easy on fertilizer in spring, mow tall and water deeply in summer, rebuild in fall, and lime and prune in winter. Fall matters most.
- By David Obeid, founder
- Reviewed
- 6 min read
The short answer
Which season matters most for a fescue lawn?
Fall. Tall fescue does its real growing in fall, so that is when feeding, aeration and overseeding pay off the most. A lawn that gets a good fall goes into winter thicker and comes out of spring with fewer weeds.
Spring and summer are mostly about protecting the lawn: stopping crabgrass before it starts, mowing tall, watering well and keeping disease in check through the heat. Winter is quiet, but it is when lime goes down and crape myrtles get pruned.
At a glance
What happens to the lawn in each season?
This is the calendar we work from for Northern Virginia lawns.
| Season | What the lawn needs | What we do |
|---|---|---|
| Spring (March to May) | Crabgrass prevention before the soil warms, light feeding, the first mows | Mowing starts in late March. Pre-emergent crabgrass control goes down by soil temperature. Disease prevention and Bermudagrass suppression start around May. |
| Summer (June to August) | Tall mowing, deep watering, protection from heat and disease | Weekly mowing at about 3.5 to 4 inches or taller. Disease prevention every three weeks or so. A summer gutter cleaning. The aeration window opens in August. |
| Fall (September to November) | The main feeding, aeration and overseeding, leaf removal | The most important fertilization visits. Core aeration and overseeding, best from mid-September into October. Mowing ends in mid-November and leaf cleanup begins in late October. |
| Winter (December to February) | Rest, soil balance, dormant pruning | Winter lime. The last leaf cleanup touch-up into early January. A winter gutter cleaning. Crape myrtle pruning from January to March. |
Spring
What should you do for your lawn in spring?
Get crabgrass preventer down before the soil warms up, and keep spring fertilizer light. Crabgrass germinates once soil holds around 55°F for several days, which shifts year to year, so timing follows soil temperature rather than the calendar. South-facing slopes and lawn next to pavement warm up first.
Heavy spring feeding mostly pushes soft top growth that struggles in summer. Spring is also a poor time to seed here: new grass has only a few months to root before the heat arrives. If your lawn is thin, plan to fix it in the fall.
Summer
How do you keep a lawn healthy through summer?
Mow tall, water deeply and watch for brown patch. Tall fescue does best at about 3.5 to 4 inches, and even taller in the heat, because a taller canopy shades the soil and keeps the plant cool.
About an inch of water a week, rain included, in one or two deep soakings does more than a light sprinkle every evening. Hot, humid stretches are when brown patch shows up as tan, circular patches. Here is how to tell what is causing summer browning.
Fall
What should you do for your lawn in fall?
Feed it, aerate it and overseed it, then keep the leaves off it. The prime feeding windows run roughly from mid-August to mid-September and again in October and November, when cool-season grass is actively growing.
Core aeration and overseeding works best from mid-September into October, and new seed needs to stay moist for two to three weeks afterward. Once the leaves start falling in late October, clearing them keeps them from smothering the grass you just worked to grow. More on aeration timing.
Winter
Is there anything to do for a lawn in winter?
A little: lime, leaf cleanup and dormant pruning. Lime goes down in winter to help balance the soil so the lawn can use what it is fed in spring. Our leaf cleanup season runs into early January with a final touch-up.
Winter is also the right time for crape myrtle pruning, from January to March while the trees are dormant, and for a winter gutter cleaning once the leaves are down.
Related questions
What people also ask
When does the mowing season start and end?
We mow from late March to mid-November. After that, we transition to fall leaf cleanup, which is a separate service you sign up for.
When should crabgrass preventer be applied?
Before the crabgrass germinates, which happens once soil temperatures hold around 55°F for several days in a row. That timing shifts year to year and is driven by soil temperature, not the calendar.
Is spring or fall better for seeding?
Fall, for most Northern Virginia lawns. Fall brings warm soil, cooler air, fewer weeds and steadier moisture, which helps tall fescue establish. Spring seeding can work but usually needs more weed control and careful watering heading into summer heat.
When does fall leaf cleanup happen?
From late October into early January: two cleanups and a touch-up, with the leaves hauled away.
Keep reading
More from the Learning Center
- When should you aerate and overseed in Northern Virginia? Why fall beats spring, why fescue needs it every year, core versus spike aeration, and the watering that decides whether seed takes. Timing and seasons · 6 min read
- How much should you water your lawn? How much water an established fescue lawn needs, how to measure it, the best time of day, and how new seed is different. Lawn care basics · 5 min read
- How do you get rid of lawn weeds and keep them out? Pre-emergent versus post-emergent, why crabgrass timing follows soil temperature, and why a thick lawn is the best weed control there is. Lawn problems · 6 min read
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