Seeding season is over. The most important feeding of the year hasn't happened yet.

By John Pelliccio, owner · October 17, 2026 · 6 min read

We put down our last seed on October 15. Since then the phone has gone quiet, the way it does every year, because most people assume the lawn season ends when the seeding season does. It doesn't. The single most valuable thing we do to a lawn all year happens in the next five or six weeks, on lawns in New City and Nanuet and Pearl River and Hillsdale that look, to be honest, like they don't need anything.

This is the post I wish every new customer read before they asked to skip the November visit.

What the grass is actually doing in November

Around the first week of November in Rockland County the top of the plant stops growing. You mow once more, maybe twice, and then you put the mower away. From the sidewalk the lawn looks finished for the year.

Underneath, nothing has stopped. Roots keep growing until the soil itself drops below about 40 degrees, which around here is usually late November to early December, sometimes later in a mild year. And because the plant has stopped pushing up leaf, every bit of nitrogen and potassium it takes in during this window gets stored: in the roots, in the crown, in the rhizomes under the surface. Nothing is spent on top growth, because there is no top growth to spend it on.

That stored energy is what the lawn runs on in March and early April, when the soil is still too cold for spring fertilizer to do anything. A lawn that was fed in November greens up two to three weeks before the lawn next door, with no help. A lawn that wasn't greens up late and thin, and that thin spring turf is exactly where crabgrass gets its start in May. The July lawn you see is decided, more than people realize, in November.

Why this is the application people skip

Because the lawn looks fine. It is green, it's not growing, the leaves are the problem now, and a company that shows up to fertilize a lawn that doesn't look like it needs fertilizing reads, to a lot of homeowners, like a company padding the invoice.

I understand that, and it's why I'm writing this instead of just sending the truck. The late-fall feeding is not the round we make money on. It is the round that makes every other round work. It's in all three of our programs because taking it out would make the spring look worse and cost you more to fix. If you are the type who wants to cut one application a year to save money, cut the spring one before you cut this one. I mean that.

Timing: after the top stops, before the ground freezes

The window in our area is roughly the first week of November through Thanksgiving, with some slack on either end depending on the year. Too early, say mid-October while the grass is still growing, and the plant burns the nitrogen on one more flush of leaf you have to mow. Too late, after the ground has frozen, and the fertilizer sits on top until the first thaw and a good part of it runs off into the storm drain, which is bad for the Hackensack and worse for your wallet.

Our crews run the late-fall round from the end of October through about the week after Thanksgiving, working north to south, because the ground in Stony Point and Tomkins Cove freezes a week or two before Westwood and the Township of Washington. If you're doing your own: after your last or second-to-last mow, on a day the ground isn't frozen, is the rule.

What goes down, and what the "winterizer" bags get wrong

Walk into a box store in November and the bags say "Winterizer" in big letters. Most of them are heavy on fast-release nitrogen, because that's what makes grass look green quickly in a photo. For a late-fall feeding that's backwards. What the plant needs to store is potassium, for cold tolerance and root health, and a slow-release nitrogen source that trickles in over the weeks the roots are still working rather than dumping all at once.

Our late-fall blend leans on potassium, uses a controlled-release nitrogen so the plant takes it in as it can use it, and goes down at a rate matched to your measured lawn, not to whatever the spreader setting on the bag says. On Hydra-Guard lawns the surfactant is still doing its job this time of year too: it moves fall rain down to the root zone instead of letting it sit on top, which is why the Nyack lawn we seeded in late September filled in without the homeowner watering it once.

Lime: the reason your fertilizer might not be working at all

Most soil in Rockland County and the Pascack Valley runs acidic, somewhere in the 5s on the pH scale, because of the bedrock we sit on and decades of oak leaves. Grass wants to be in the low-to-mid 6s. The problem with acidic soil isn't that the grass dies; it's that the fertilizer you pay for gets locked up. At a pH of 5.5, a meaningful share of the nitrogen and most of the phosphorus in any feeding is chemically unavailable to the plant. You put it down, it's in the soil, and the roots can't use it.

Lime fixes that, slowly, which is why it goes down in the fall: it has all winter to work through the top few inches of soil, and the freeze-thaw cycle helps carry it down. Lime can be applied any time the ground isn't frozen, so it often rides along with the late-fall feeding or right after. It's built into our programs on lawns that test for it. If you're doing your own, the rate should come from a soil test, not a guess; the county extension office will run one for a few dollars, and the difference between a lawn that needs 20 pounds per thousand square feet and one that needs 50 is real money and real results.

The November tick treatment, while we're out there

Adult deer ticks, the ones that carry Lyme, have their second peak of the year in October and November, and they stay active on any day above freezing. They're looking for one more blood meal before they overwinter, and the leaf litter along the edge of your property is exactly where they wait. If you have dogs, kids, or a yard that backs up to woods or a brook, the November tick application on our Yard Armour Year-Round program is the one that earns its keep, and it's the reason that program exists as a separate version. We'll do it on the same visit.

Leaves, one more time

Mulch-mow a light layer; it's free organic matter and it helps. But a mat of wet oak leaves left for two weeks kills the grass underneath, and it undoes the feeding you just paid for. The rule is still the rule: if you can't see grass through the leaves, they come off. The lawn is done making food on top. Don't make it spend what it stored fighting for light.

What this looks like on your lawn

• Late October to Thanksgiving week: the late-fall feeding, potassium-heavy with slow-release nitrogen, rate set by your measured square footage.
• Same window: lime, on lawns that test for it.
• November: the tick application, on Yard Armour Year-Round lawns.
• Your part: one more mow, a notch lower than you've been cutting, and keep the leaves from matting.

Then nothing happens for three months, and in late March your lawn is green while the ones around it are still brown. That isn't luck, and it isn't the spring fertilizer. It's November.

The short version

Seeding is over for the year. The late-fall feeding is not, and it matters more than any other application you'll get. Don't skip it, don't do it too early, and don't put it on frozen ground. Get the pH right so the feeding can actually work. Keep the leaves off. If you want us to handle it: (845) 638-4999 in Rockland, (201) 664-4358 in the Pascack Valley, or send the form. We measure the lawn, we put the price in writing, and nobody from our office is going to call you in July trying to sell you something.