Weed Control · New York
How to Kill Creeping Charlie and Wild Violet in New York
Creeping Charlie and wild violet shrug off standard three-way weed killer for two different reasons. Both answer to triclopyr — and to October, not spring.
Regional Hub
New York Lawn Care
Lawn care built for New York: Kentucky Bluegrass maintenance, regional weed and disease control, and a season-by-season calendar for USDA zones 4a–7b.
Dominant Grass
Kentucky Bluegrass
USDA Zones
4a–7b
Soil
Glacial till and rocky loams upstate (Buffalo/Syracuse); sandy outwash over the sole-source aquifer on Long Island
Humidity
Moderate upstate with humid July and August; higher and slower to dry along the coast and on Long Island
Weed Control in New York
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Weed Control · New York
How to Get Rid of Crabgrass: Timing Beats Chemicals in New York
Crabgrass is a timing problem — but one pre-emergent pass is not a whole season. UF/IFAS: season-long control takes a second application 6–9 weeks later.
Weed Control · New York
How to Get Rid of Nutsedge: One Pull Does Nothing in New York
Nutsedge ignores ordinary weed killer because it is a sedge. UC IPM: one pull does nothing — but pulling every 2 to 3 weeks drains the tuber underneath it.
Weed Control · New York
Kill Dandelions Without Killing Grass — For Good in New York
Killing dandelions without killing grass comes down to the taproot: the selective herbicides that reach it, and the month they actually work.
Weed Control · New York
Spring Weed Control: Soil Temp, Not the Calendar in New York
Spring weed control is decided by soil temperature, not the calendar — a pre-emergent applied two weeks late does nothing at all. The trigger, and the plan.
Lawn Diseases in New York
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Lawn Diseases · New York
Red Thread: The Lawn Is Telling You It Is Hungry in New York
Penn State: in most situations red thread is not severe enough to warrant fungicide. It is a nitrogen reading — and the fix is feeding, not spraying.
Lawn Diseases · New York
Voles in the Lawn: The Runways Fix Themselves in New York
Melting snow reveals the runways, and the voles usually left with it. Illinois says the lawn regrows by summer — the damage worth acting on is on your trees.
Lawn Diseases · New York
Lawn Disease After Flooding: What Follows the Water in New York
Flooding moves the pathogen, stresses the plant and leaves the leaf wet. The hour thresholds that trigger Pythium and brown patch, and why nitrogen cuts both ways.
Lawn Diseases · New York
Dollar Spot Treatment: The Disease Nitrogen Fixes in New York
Dollar spot is the one lawn disease caused by too little nitrogen, not too much — the exception to every other fungus guide here. The hourglass lesion confirms it.
Lawn Diseases · New York
Armyworms and Sod Webworms: Which Ate Your Lawn? in New York
Green to brown in two days means armyworms; closely cropped patches mean sod webworms. Both are caterpillars — which rules out most grub products.
Lawn Diseases · New York
Chinch Bugs: How to Confirm Them and What Kills Them in New York
Chinch bugs: two species, two grass families, and a float test that confirms them in five minutes. Plus the documented resistance nobody prints on the bottle.
Lawn Diseases · New York
Lawn Grubs: How and When to Kill Them in New York
Most lawns never reach the grub treatment threshold, so count before you buy — and curative products only work from August through October.
Lawn Diseases · New York
Brown Patch Treatment: Fungicide Alone Won't Fix It in New York
Brown patch treatment needs two things: the right fungicide, and the summer nitrogen habit that caused it. Fungicide alone buys you a repeat next July.
Lawn Diseases · New York
Snow Mold Treatment: It Grew Under the Snow in New York
Snow mold treatment is mostly about the autumn before: gray and pink snow mold grew under the snow, so what you see in March is already finished damage.
Grass Types in New York
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Grass Types · New York
Fine Fescue Lawn Care: The Grass That Wants Less in New York
Penn State lists high nitrogen among the conditions fine fescue is not adapted to — beside heavy traffic. It is the one lawn grass you can spoil.
Grass Types · New York
Perennial Ryegrass: The Fastest Grass, and Its Price in New York
Penn State: it germinates in 5 to 7 days and is very competitive with other turfgrasses. Both halves decide what care this lawn costs you.
Grass Types · New York
Kentucky Bluegrass Care: It Repairs Its Own Damage in New York
Kentucky bluegrass repairs its own damage and browns in August for the same reason — rhizomes. Mow at 3 inches, feed in autumn, count the dormancy weeks.
Grass Types · New York
Tall Fescue Lawn Care: Deep Roots, No Self-Repair in New York
Tall fescue lawn care is one trade-off: the most heat-tolerant cool-season grass, but it never repairs itself and brown patch waits every summer.
Grass Types · New York
Growing Grass in Shade: The Two-Hour Minimum in New York
Growing grass in shade has a hard floor: fine fescue is the most shade-tolerant lawn grass and still needs two hours of direct sun. Below that, no seed works.
Fertilizer in New York
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Fertilizer · New York
Winterizer Fertilizer: Right Idea, Wrong Bag in New York
Purdue backs late-fall nitrogen and faults the bags: rates run too low, the potassium needs a soil test to justify — and warm-season lawns should skip it entirely.
Fertilizer · New York
Lawn Soil pH: When to Lime, When to Add Sulfur in New York
Lawn soil pH decides whether lime or sulfur is the fix — and the right answer inverts between Georgia and Arizona. What the soil test number means.
Fertilizer · New York
When to Weed and Feed: Two Bags Often Beat One in New York
Weed and feed does two jobs on two different calendars, so one bag rarely times both right. The month it works, and the lawns the label forbids.
Fertilizer · New York
When to Fertilize: Autumn Matters More Than Spring in New York
When to fertilize a lawn: autumn matters more than spring for cool-season grass, the reverse for warm-season — plus the state laws that close the window.
Fertilizer · New York
Why Is My Lawn Yellow? 9 Causes, Not Just Nitrogen in New York
Your lawn is yellow and nitrogen is only one of nine causes — feeding the wrong one wastes a season. Diagnose by pattern, blade and timing first.
Lawn Care Guides in New York
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Lawn Care Guides · New York
Dormant Seeding: The Backup Window After You Missed Fall in New York
Purdue's data: dormant seeding beats spring and trails September only slightly. The rule is cold enough not to germinate — Thanksgiving through March, not October.
Lawn Care Guides · New York
Lawn Recovery After Flooding: The Clock Starts Underwater in New York
How long turf survives underwater, why the damage shows up days later, the 1-inch silt rule, and the survival percentage at which replanting beats rescuing.
Lawn Care Guides · New York
Lawn Ruts After Storm Cleanup: What Repairs, What Doesn't in New York
Shallow ruts take a ¼-inch topdressing; deep subsoil compaction from heavy equipment on saturated ground is, in Penn State's words, practically permanent.
Lawn Care Guides · New York
Waterlogged Lawn: Test It Before You Fix It in New York
Water standing after every rain has four possible causes and they need different fixes. A 15-minute hole test tells you which one you have before you spend money.
Lawn Care Guides · New York
When to Stop Mowing the Lawn: Watch 50°F, Not the Calendar in New York
Cool-season grass stops growing when daytime highs stay below 50°F — that's the last-mow trigger. Too tall into winter invites disease; scalping is worse.
Lawn Care Guides · New York
Winter Lawn Care: The Damage Happens in February in New York
Penn State: crown hydration is the most common and destructive winter injury, and it happens in late winter after thawing and freezing — not in the deep cold.
Lawn Care Guides · New York
Summer Lawn Care: What Helps and What Hurts in New York
Summer lawn care inverts by grass type: feeding a warm-season lawn is routine; feeding a cool-season lawn is the classic mistake.
Lawn Care Guides · New York
Fall Lawn Care: What to Do, and in What Order in New York
Fall lawn care is the one season when doing more genuinely pays — for cool-season grass. On a warm-season lawn, autumn is mostly about stopping.
Lawn Care Guides · New York
How to Aerate a Lawn: Spike Tools Make It Worse in New York
How to aerate a lawn, and when not to: spike tools compact the soil they punch through, core aeration pulls plugs out, and most lawns need it rarely.
Lawn Care Guides · New York
How to Fix Bare Spots in a Lawn — Or Leave Them in New York
A bare spot smaller than your fist closes on its own. The bigger ones are a symptom — and the shape of the spot tells you which cause to fix first.
Lawn Care Guides · New York
Lawn Mowing Height: Your Deck Setting Is Lying in New York
Your deck setting is not your lawn mowing height — measure it once and most people find they cut lower than they think. The real number by species.
Lawn Care Guides · New York
Should You Bag Grass Clippings? It Costs Nitrogen in New York
Bagging grass clippings throws away up to a quarter of your lawn's nitrogen — and clippings do not cause thatch. The three times bagging is still right.
Lawn Care Guides · New York
Spring Lawn Care: Do Less, and Do It Later in New York
Most spring lawn damage is done in March by people being helpful. Spring lawn care runs on soil temperature, not the calendar — and the order matters.
Lawn Care Guides · New York
When to Overseed Your Lawn — and When Not to Bother in New York
When to overseed: late summer beats spring for cool-season lawns, most warm-season lawns should not be overseeded at all — and pre-emergent blocks your seed.
Lawn Care Guides · New York
How Often to Water Your Lawn: Twice Beats Daily in New York
How often to water a lawn: twice a week beats every morning, and one inch a week beats guessing. Measure your own sprinkler — the timer is not telling you.
Product Reviews in New York
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Product Reviews · New York
Best Weed Killer for Lawns: Match It to the Weed in New York
There is no best weed killer for lawns, only the right one for your weed: the seven chemistries that matter, what each kills, and the one that kills grass too.
Product Reviews · New York
Organic Weed Killer for Lawns: The One That Works in New York
The organic weed killer that works on lawns is iron — it burns broadleaf weeds and moss in hours without harming grass. What it won't do: kill the roots.
New York Lawn Calendar
What your Kentucky Bluegrass lawn needs, season by season.
Spring
- Nothing before April 1 — statewide fertilizer blackout runs December 1 to April 1
- Pre-emergent mid-April on Long Island to mid-May upstate, on soil temperature
- Mow at 3 to 3.5 inches, which is Cornell's height for a good lawn
- Lime per soil test as soon as the ground firms up
Summer
- Return the clippings — Cornell credits them with 25 to 50 percent of the lawn's nitrogen need
- Optional light feedings in May and June only on higher-quality lawns
- Never more than 1 lb of nitrogen per 1,000 sq ft in one application
- Watch for brown patch on ryegrass and fescue through humid August nights
Fall
- September is the feeding that matters — Cornell puts it first at every maintenance level
- Seed and overseed mid-August through late September
- October broadleaf application for ground ivy, violet and dandelion
- Final feeding no later than October, and never after November on Long Island
Winter
- No lawn fertilizer December 1 through April 1 (state law)
- Long Island and Nassau residents: county nitrogen rules start earlier than the state's
- Expect snow mold in the lake-effect belt; spread plow piles out
- Sweep any spilled fertilizer off drives and paths — required by law, not just tidiness
Official New York resources
Three things every guide here eventually sends you to do — and all three answers are specific to New York rather than national: test your soil, read your own land-grant programme, and check whether the state has added anything to a product's federal label.
Soil testing
Soil testing here runs through a state agency rather than the university:
Cornell lawn and garden testing, run through Dairy One / Agro-OneRoutine lawn samples do not go to a Cornell building: you use Cornell's Submittal Form H and post the sample to Dairy One in Ithaca, with the cheque made out to them. The recommendations are still calibrated on Cornell's New York soils research, which is the reason to use this route rather than any commercial lab.
Why the number matters more than the bag: soil pH in New York.
Turfgrass research
Every guide here defers to your own land-grant programme somewhere. This is it:
Cornell TurfgrassCornell University CALS
Names homeowners first in its own remit — "dedicated to helping homeowners, lawn care professionals, sports turf managers, golf course superintendents and sod producers use research-based practices" — and the practical asset is the Turf Forecast tool, a weather-driven decision aid for disease, weed and water timing rather than a calendar. Its homeowner guide is titled "Lawn Care: The Easiest Steps to an Attractive Environmental Asset", and the monthly ShortCUTT newsletter plus the Cornell Turf Show webinar archive are where in-season judgement calls get discussed.
Where their advice and a national rule of thumb disagree, follow theirs — they trialled it in 4a–7b.
Pesticide regulation
Pesticides here are an environmental-agency matter, not an agriculture one:
New York State Department of Environmental ConservationBureau of Pest Management
Restrictions we found printed on labels: New York product restrictions.
Municipal Watering Restrictions & Microclimates
Hyper-local drought regulations and watering schedules for major metropolitan areas in New York.
Lawn Health Newsletter
Seasonal lawn reminders, on time
Pre-emergent windows, disease alerts and fertilization schedules for your region — one short email, right when your lawn needs it.
Free forever. Unsubscribe anytime. US lawns only (for now). This season's companion: the printable summer checklist.