New sod laid in September or October gets fed once, at day 30, after it passes the tug test, with a phosphorus-free bag at about 1 pound of nitrogen per 1,000 square feet. That rule does not move. What moves is the calendar underneath it: every state we deliver to has a date after which lawn fertilizer is either illegal or pointless, and a sod job that goes down on October 15 has its 30-day feeding land inside some of those windows and outside others. This is the table for that, state by state, checked against each state's own text.
Count 30 days from the day the sod went down. If the lawn passes the tug test, feed it that week with a phosphorus-free, mostly slow-release bag at about 1 pound of nitrogen per 1,000 square feet, unless your state's date has passed or the grass has gone dormant, in which case you wait for the first allowed date in spring and lose nothing. "No nitrogen after October 1" is not a law in any state we serve; Cornell's own lawn guidance says late-season feeding promotes root growth. The bag built for this feeding, the 8-0-6 with 2 percent non-staining iron, one 25-pound bag per four pallets at 30 days, is OVER SOD™; the bag that went under the sod at install, the 4-2-5 with no iron and four species of mycorrhizae, one 25-pound bag per pallet mixed into the top 4 to 6 inches, is UNDER SOD™. Both are planned for spring 2027.
This is part of a series: read your soil test → what goes under the sod → the 30-day feeding, seven bags scored → why it is two steps.
Fall sod is the best sod. The paperwork is the only catch.
Warm soil, cool air, and rain that does the watering: September is the month lawns are made, and October is still very good. We wrote up why in September Is the Best Time of Year to Lay Sod. Cool-season grass keeps growing roots until the ground freezes, and Cornell's lawn program says it plainly: "Nutrients released from the soil, grass clippings and late season fertilization (feeding) will promote root growth."
The catch is not agronomy. It is that the 30-day feeding on a late-fall install can land after a date on which your state says no. Those dates were written for established lawns and for water quality, not for new sod, and they do not have a new-sod exemption the way the phosphorus rules do. So the sod gets its day-30 feeding if the calendar allows it, and waits for spring if it does not.
The 30-day rule does not move. The calendar does.
Whatever went under the sod is the whole first-month program. The 30-day feeding is the first time anything goes on top: the plant has rooted, the incorporated charge is mostly spent, and the rooted lawn wants nitrogen, potassium, and, if the leaf is pale, iron. It does not want phosphorus, which is why the bag for this job is phosphorus-free by every state's definition. The tug test decides whether the lawn is ready: grab a corner, pull; if it fights you, feed it; if it lifts, water and wait.
Here is what the calendar does to that plan. Each row is an install date, its day-30 date, and what each state's rule says about feeding on that date. "OK" means legal on that date. "Wait" means the date is inside a blackout and the first allowed date is shown. Connecticut is the odd one: its law restricts phosphate-containing fertilizer December 1 through March 15, so a phosphorus-free bag has no legal date in Connecticut at all, and the only limit is UConn's recommendation to fertilize between April 15 and October 15 while the grass is growing.
| Sod laid | Day 30 | CT | NY (statewide) | NY, Suffolk County | MA | NJ homeowner | NJ professional | VT | MD | NH, ME, RI |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 1 | Oct 1 | OK | OK | OK | OK | OK | OK | OK | OK | OK |
| Sep 15 | Oct 15 | OK (UConn's last recommended day) | OK | OK | OK | OK | OK | Wait until Apr 1 (blackout starts Oct 15; feed Oct 14 if it passes the tug test) | OK | OK |
| Oct 1 | Oct 31 | Legal; past UConn's recommended window, so only if the grass is still growing | OK | OK (last day) | OK | OK | OK | Wait until Apr 1 | OK | OK |
| Oct 15 | Nov 14 | Legal; growth-dependent | OK | Wait until Apr 1 | OK | OK (last day) | OK | Wait until Apr 1 | OK (last day before Nov 16) | OK if the grass is growing |
| Nov 1 | Dec 1 | Legal for a phosphorus-free bag; the lawn is likely dormant, wait for spring | Wait until Apr 1 | Wait until Apr 1 | Wait until Mar 1 | Wait until Mar 1 | Wait until Mar 1 | Wait until Apr 1 | Wait until Mar 1 | Wait for spring growth |
| Nov 15 | Dec 15 | Same as above | Wait until Apr 1 | Wait until Apr 1 | Wait until Mar 1 | Wait until Mar 1 | Wait until Mar 1 | Wait until Apr 1 | Wait until Mar 1 | Wait for spring growth |
The rules behind each column, with the source each one was checked against:
| State | Date rule | What it covers | Other fall limits | Source |
|---|---|---|---|---|
| Connecticut | Dec 1 – Mar 15 | Phosphate-containing fertilizer only; a phosphorus-free bag is not date-restricted | UConn recommends fertilizing only Apr 15 – Oct 15; 20 ft from water for phosphate products | UConn, Your Lawn and the Phosphorus Law |
| New York | Dec 1 – Apr 1 | All lawn fertilizer | 20 ft from surface water (3 ft with a drop spreader), which does not apply to a newly established lawn in its first growing season | NY ECL § 17-2103 |
| New York, Suffolk County | Nov 1 – Apr 1 | All lawn fertilizer, county law 41-2007 | Towns on the East End add licensing rules on top of the county law | Suffolk County Water Quality Improvement |
| New York, Nassau County | Nov 15 – Apr 1 | All lawn fertilizer, county law | Nassau and Suffolk both run their own certification and signage programs | Nassau County Fertilizer Law, via Plainview Water District |
| Massachusetts | Dec 1 – Mar 1 | All plant nutrients | Nothing on frozen, snow-covered, or saturated soil, and nothing on "drought dormant, cold dormant, inactive or otherwise brown turf"; 20 ft broadcast / 10 ft drop spreader from water | MDAR, 330 CMR 31.00 fact sheet |
| New Jersey | Homeowners Nov 15 – Mar 1; professionals Dec 1 – Mar 1 | Nitrogen and phosphorus | 0.9 lb N per application, 0.7 lb soluble; nothing on frozen ground or before heavy rain | Rutgers NJAES |
| Vermont | Oct 15 – Apr 1 | All lawn fertilizer | 25 ft from water; nitrogen at least 15% slow-release | 10 V.S.A. § 1266b; Lake Champlain Committee |
| Maryland | Nov 16 – Mar 1 | Nitrogen and phosphorus (professionals may apply up to 0.5 lb N to Dec 1) | Not on frozen ground or before heavy rain; follow University of Maryland rates | Maryland Department of Agriculture |
| New Hampshire | No statewide date in the statute | The law limits the content and rates of turf fertilizer sold at retail, not the calendar | 25 ft from water and storm drains for phosphorus products | NH RSA 431:4-b; UNH Extension |
| Maine | No statewide date | The phosphorus law works through retail signage | Common sense: not on frozen ground | Maine DEP, 38 MRSA §419 |
| Rhode Island | No statewide date | We found no statewide lawn fertilizer date or phosphorus law in the General Laws or on URI Extension's pages | Feed only actively growing turf; towns near ponds and the Bay may have their own rules | Absence of a law, checked September 2026 |
Reading the table: the five dates that bite
New Jersey, November 14. Sod laid October 15 has its day-30 feeding on the last legal day for a homeowner. Do the tug test on the 13th. If it passes, feed on the 14th; if it doesn't, you are waiting until March 1, and that is fine.
Long Island, two different days. Suffolk County closes November 1, so sod laid October 1 feeds on Halloween or waits until April 1. Nassau County closes November 15, so sod laid October 15 feeds on the 14th, the same last-day squeeze as New Jersey. Both counties sit inside the statewide December 1 rule, which does not help you on Long Island.
Vermont, October 14. Vermont's window closes October 15, the earliest in the region. Sod laid September 15 has day 30 on the first blackout day. If it passes the tug test on the 14th, feed it on the 14th. If not, spring.
Connecticut, no date at all. Connecticut's law restricts phosphate-containing fertilizer December 1 through March 15. A phosphorus-free bag is not covered by that clause, which means the only limit on the 30-day feeding in Connecticut is whether the grass is still growing. UConn's recommendation is to fertilize only between April 15 and October 15; we treat that as the sensible line for anything after Halloween, not as a prohibition.
Massachusetts, the dormant rule. Massachusetts is the one state whose rule follows the grass rather than the calendar: no plant nutrients "to drought dormant, cold dormant, inactive or otherwise brown turf." A late-November sod job that has gone dormant is not fed even on a legal date. That rule is good agronomy everywhere, and we apply it in every state.
"No nitrogen after October 1" is not a law
You will see that sentence repeated by AI answers and lawn blogs. It is a rule of thumb for fast-release nitrogen on established lawns in snow-mold country, and it is not the law in any state we deliver to. The legal dates run from October 15 (Vermont) to no date at all (Connecticut, for a phosphorus-free bag). The agronomy runs the other way, and it is not close.
Late-season feeding is standard practice in the extension literature, and it is timed after October 1, not before it. Michigan State's Paul Rieke put the Great Lakes timing at "after growth has ceased for all practical purposes," which "occurs anywhere from the last week of October to the second week of November." Virginia Tech's extension guidance puts it at "mid October to late November when cool temperatures have reduced top growth, but root growth is still active." Ohio State research, summarized in the turf literature, found that "root growth of cool-season grasses will continue at soil temperatures close to freezing" while "shoot growth will slow and eventually cease long before." Cornell's lawn page lists late-season feeding among the things that promote root growth.
The snow-mold concern is real and it is specific: heavy nitrogen in mid-fall, while the grass is still pushing leaf, produces succulent growth that goes under the snow soft. Rieke's own pros-and-cons list says late-fall nitrogen "may increase the amount of snow mold, but there is a much quicker recovery." The 30-day feeding is not that application: about 1 pound of nitrogen, mostly slow-release, once, inside Cornell's ceiling of "never apply more than 1 pound of nitrogen per 1,000 square feet per application."
Two honest limits. The University of Wisconsin's turf group found nitrogen uptake is lower at the very end of fall than earlier, because cold soil and low water use slow nitrogen's movement to the roots, so a feeding in late November does less than the same feeding in October. And every late-season recommendation carries the same condition: the grass must still be green. That is why the tug test and the growth check come before the calendar, and why Massachusetts wrote the dormant-turf rule into law.
On our own calendar
Three of our own installs this season, and where day 30 landed: the 3,600-square-foot Meriden, Connecticut job went down August 27, so day 30 was September 26; the 8,000-square-foot Westport job went down August 28, day 30 September 27; the 2,600-square-foot Warren, Rhode Island job went down September 3, day 30 October 3. All three inside every window on the table, which is the normal case for August and September installs. The table exists for October and November, when it stops being normal.
If day 30 lands in the blackout
Nothing bad happens. The sod rooted on the charge that went under it at install; the 30-day feeding is what carries the rooted lawn through its first season, and a lawn that is going dormant anyway does not need it until it wakes up. Water it through any dry spell until the ground freezes. Keep traffic off it. In spring, wait for your state's first allowed date and for the grass to be actively growing, whichever is later, then give it the feeding you skipped: the same phosphorus-free bag at the same rate. Then resume the normal seasonal program for your grass and state.
What you do not do is make up for the missed feeding by doubling in spring, or by putting anything on top before the tug test passes. New sod that went down in late October may not pass the tug test until April; that is the sod doing its job slowly, not failing.
Sod laid in November
We deliver into November most years and into December in mild ones. Sod laid on unfrozen ground in November roots a little, then goes dormant, then finishes rooting in April. Three things change:
1. Everything that matters at install still matters. Prepared base, the incorporated bag, same-day laying, rolling, and water. Cold soil slows the biology and the nitrogen release under the sod; it does not stop them, and the potassium and the fungi are in the soil waiting for spring. That last sentence is our read of how these organisms overwinter in soil, not a trial result. 2. No feeding on top until spring. Every state's date table says so by December, and Massachusetts' dormant-turf rule says so even where the calendar does not. 3. The first spring feeding is the 30-day feeding you skipped, taken when the state's window opens and the lawn passes the tug test.
If you are choosing between a late-November sod job and waiting for April, the November job wins on one condition: the base is ready and the ground is not frozen when the truck arrives. Sod that sits on a pallet in cold weather keeps better than in July, but it still needs to go down the day it arrives.
What to feed it with
The 8-0-6 with 2 percent non-staining iron, one 25-pound bag per four pallets at 30 days, is OVER SOD™. One 25-pound bag covers 2,000 square feet at 12.5 pounds per 1,000, which is 1 pound of nitrogen, mostly slow-release, no phosphorus, and potassium at three-quarters of the nitrogen for a lawn heading into winter. It is planned for spring 2027; the water-insoluble share will be on the label before a bag ships.
Until then, LESCO 24-0-11 Poly Plus at 4.2 pounds per 1,000 square feet is the bag we point people to for this feeding, scored 4 of 6 on our rubric because it prints no sod rate on the bag and its label says to sweep the iron off walks. The full scoring of seven bags, and why the phosphorus-free rule matters more in fall than any other season, is in the 30-day feeding post. Do not use a starter, a weed-and-feed, or anything with a pre-emergent on new sod at any time of year.
Run your own install date through the state rules:
Plan your 30-day feeding
Your 30-day feeding date is September 26, 2026. Do the tug test first. If a corner of the sod lifts, wait, water, and check again in a week.
Connecticut: no application of fertilizer, soil amendment, or compost that contains phosphate to any lawn December 1 through March 15, and none within 20 feet of any water body (15 feet with a drop spreader, a rotary spreader with a deflector, or targeted spray). A phosphorus-free bag is not covered by the December 1 to March 15 date in the statute, but do not apply any fertilizer to frozen or snow-covered ground.
Your feeding date is outside Connecticut's blackout window.
OVER SOD™: 25 lb for 2,000 sq ft (one 25 lb bag), delivering 1 lb of nitrogen per 1,000 sq ft.
Sources: Public Act 12-155 and the Connecticut rules page.
The procedure for a fall install
1. Soil test before the truck comes; the bag under the sod follows the test. On an optimum or high phosphorus result, one 25-pound bag of UNDER SOD™ per pallet, mixed into the top 4 to 6 inches, once. 2. Lay the sod the day it arrives, roll it, water it. Water every day for two weeks, then as needed until the ground freezes. 3. Count 30 days. Find your state's row in the second table and your day-30 date in the first. 4. Day 30, if the date is legal and the grass is growing: tug test, then one 25-pound bag of OVER SOD™ per four pallets, outside water buffers, not before heavy rain. 5. If the date is past or the grass is dormant: nothing on top. Water through dry spells. Keep traffic off. 6. Spring: first allowed date and active growth, whichever is later, then the feeding you skipped. 7. Resume the normal seasonal program for your grass and state.
What we are not claiming
The dates above come from each state's statute, agency page, or land-grant fact sheet as we read it in September 2026; towns and counties can be stricter, and Rhode Island is listed as having no statewide date because we found no such law, not because one was confirmed absent by the state. New Hampshire's 2024 amendments changed the content and rate rules for turf fertilizer sold at retail, which is a label question for the bags themselves, not a date question for you. OVER SOD™ and UNDER SOD™ are planned labels for spring 2027. And "the biology waits for spring" is our reading of how soil organisms overwinter, not a measurement on a sod job.
Sources
- Cornell Turfgrass Program, Lawn Care: Feeding. Late-season fertilization promotes root growth; never more than 1 lb N per 1,000 sq ft per application. https://turf.cals.cornell.edu/lawn/lawn-care-the-easiest-steps-to-an-attractive-environmental-asset/advanced-care/feeding
- UConn Soil Nutrient Analysis Laboratory, Your Lawn and the Phosphorus Law. Phosphate products restricted December 1 – March 15; UConn recommends fertilizing April 15 – October 15. https://soiltesting.cahnr.uconn.edu/your-lawn-and-the-phosphorus-law/
- New York Environmental Conservation Law § 17-2103. December 1 – April 1; buffers; first-growing-season exemption. https://nysenate.gov/legislation/laws/ENV/17-2103
- Suffolk County Department of Economic Development and Planning, Division of Water Quality Improvement. Local Law 41-2007: November 1 – April 1. https://healthylawns.suffolkcountyny.gov/word/Sign_Healthy_Lawns_Clean_Water_2024.pdf
- Nassau County Fertilizer Law, as summarized by the Plainview Water District (Anton Media Group): no fertilizer before April 1 or after November 15. https://archive.antonmediagroup.com/?p=25014
- Massachusetts Department of Agricultural Resources, Plant Nutrient Regulations for Turf and Lawns fact sheet (330 CMR 31.00). December 1 – March 1; dormant-turf rule; buffers. https://www.mass.gov/doc/plant-nutrient-regulations-turf-and-lawns-factsheet/download
- Rutgers NJAES News, November 2013. New Jersey blackout dates. https://sebsnjaesnews.rutgers.edu/2013/11/nj-fertilizer-law-restrictions-on-home-lawn-applications-now-in-effect/
- Rutgers NJAES, Quick Facts: 2011 New Jersey Fertilizer Law. Nitrogen caps. https://casite-791589.cloudaccess.net/images/Environmental/FertilizerLawquickfacts711.pdf
- Lake Champlain Committee, Lawn P No More (2011). Vermont: October 15 – April 1; 25 ft; 15% slow-release. https://www.lakechamplaincommittee.org/learn/news/item/lawn-p-no-more
- Vermont H.26 (2011), 10 V.S.A. § 1266b. https://legislature.vermont.gov/Documents/2012/Docs/BILLS/H-0026/H-0026%20As%20Passed%20by%20Both%20House%20and%20Senate.pdf
- Maryland Department of Agriculture, blackout dates notice, November 2023. https://news.maryland.gov/mda/press-release/2023/11/10/blackout-dates-for-lawn-fertilizer-applications-begin-november-16-4/
- New Hampshire RSA 431:4-b, Phosphorus Content of Turf Fertilizer (as amended effective January 1, 2025). https://gc.nh.gov/rsa/html/XL/431/431-4-b.htm
- UNH Extension, New Hampshire's Turf Fertilizer Law: What You Should Know. https://extension.unh.edu/resource/new-hampshires-turf-fertilizer-law-what-you-should-know-fact-sheet
- Maine DEP, Lawn Fertilizer and Phosphorus (38 MRSA §419). https://www.maine.gov/dep/land/watershed/fertilizer/index.html
- Rieke, P. E., Michigan State University. Late fall nitrogen: pros and cons (excerpted from Hole Notes), Michigan State University Turfgrass Information Center. https://archive.lib.msu.edu/tic/wetrt/article/1995aug27.pdf
- Virginia Cooperative Extension, Crop and Soil Environmental News, November 2003. Late fall nitrogen application timing and rates. https://sites.ext.vt.edu/newsletter-archive/cses/2003-11/latefall.html
- Michigan State University Turfgrass Information Center, February 1988. Late-season fertilization; Ohio State research on root growth near freezing soil temperatures. https://archive.lib.msu.edu/tic/wetrt/article/1988feb42.pdf
- University of Nebraska–Lincoln, Fall Nitrogen. University of Wisconsin (Soldat) finding that nitrogen uptake declines at the end of fall. https://communityenvironment.unl.edu/documents/9-26_Fall_N.pdf
- Washington State University Extension, FS058E, Phosphorus and Home Lawns. Newly sodded lawns may require less phosphorus than seeded turf because sod is often fertilized with phosphorus in production. https://wpcdn.web.wsu.edu/wp-ecommerce/uploads/sites/2/product-3984-sku-FS058E.pdf
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