Weed Control · Oklahoma
How to Kill Creeping Charlie and Wild Violet in Oklahoma
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
Oklahoma Lawn Care
Lawn care built for Oklahoma: Bermuda maintenance, regional weed and disease control, and a season-by-season calendar for USDA zones 6a–8a.
Dominant Grass
Bermuda
USDA Zones
6a–8a
Soil
Permian red clay through the centre of the state, sandy ground along the rivers and in the west, and heavier prairie soils to the northeast
Humidity
Sharply split — humid in the southeast, semi-arid in the panhandle, and the same product behaves differently at each end
Weed Control in Oklahoma
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Weed Control · Oklahoma
Dallisgrass vs Crabgrass: One Comes Back Every Year in Oklahoma
Dallisgrass and crabgrass look alike and need opposite strategies: crabgrass dies at frost, dallisgrass comes back from the same crown for years.
Weed Control · Oklahoma
How to Get Rid of Crabgrass: Timing Beats Chemicals in Oklahoma
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 · Oklahoma
How to Get Rid of Nutsedge: One Pull Does Nothing in Oklahoma
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 · Oklahoma
Kill Dandelions Without Killing Grass — For Good in Oklahoma
Killing dandelions without killing grass comes down to the taproot: the selective herbicides that reach it, and the month they actually work.
Weed Control · Oklahoma
Spring Weed Control: Soil Temp, Not the Calendar in Oklahoma
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 Oklahoma
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Lawn Diseases · Oklahoma
Voles in the Lawn: The Runways Fix Themselves in Oklahoma
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 · Oklahoma
Lawn Disease After Flooding: What Follows the Water in Oklahoma
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 · Oklahoma
Dollar Spot Treatment: The Disease Nitrogen Fixes in Oklahoma
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 · Oklahoma
Armyworms and Sod Webworms: Which Ate Your Lawn? in Oklahoma
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 · Oklahoma
Chinch Bugs: How to Confirm Them and What Kills Them in Oklahoma
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 · Oklahoma
Fire Ants in Lawns: Kill the Colony, Not the Mound in Oklahoma
Treating fire ants in lawns by drenching the mound kills workers and moves the colony. Bait reaches the queen — that difference is why most attempts fail.
Lawn Diseases · Oklahoma
Lawn Grubs: How and When to Kill Them in Oklahoma
Most lawns never reach the grub treatment threshold, so count before you buy — and curative products only work from August through October.
Lawn Diseases · Oklahoma
Brown Patch Treatment: Fungicide Alone Won't Fix It in Oklahoma
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 · Oklahoma
Snow Mold Treatment: It Grew Under the Snow in Oklahoma
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 Oklahoma
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Grass Types · Oklahoma
Buffalograss: Weeds Mean You Are Doing Too Much in Oklahoma
Buffalograss lawn care inverts the usual advice: K-State says weeds are a sign it is overmanaged, so the fix is less water and later feeding, not herbicide.
Grass Types · Oklahoma
Fine Fescue Lawn Care: The Grass That Wants Less in Oklahoma
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 · Oklahoma
Perennial Ryegrass: The Fastest Grass, and Its Price in Oklahoma
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 · Oklahoma
Zoysia Grass Care: The Grass Nobody Defaults To in Oklahoma
Zoysia is a secondary grass in 25 states and the dominant one in none. You choose it deliberately — and three of its costs are never on the sod invoice.
Grass Types · Oklahoma
Kentucky Bluegrass Care: It Repairs Its Own Damage in Oklahoma
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 · Oklahoma
Tall Fescue Lawn Care: Deep Roots, No Self-Repair in Oklahoma
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 · Oklahoma
Growing Grass in Shade: The Two-Hour Minimum in Oklahoma
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.
Grass Types · Oklahoma
Bermuda Grass Care: Mow It Lower Than You Think in Oklahoma
Bermuda grass care starts with mowing lower than feels right — 1 to 2 inches. Plus when to scalp, how much nitrogen it takes, and the schedule that works.
Grass Types · Oklahoma
St. Augustine Care: Mow High, Watch for Chinch Bugs in Oklahoma
St. Augustine grass care: mow high, watch for chinch bugs, and know it cannot be seeded — only sod, plugs or sprigs. Plus the herbicides that damage it.
Grass Types · Oklahoma
St. Augustine vs Zoysia: Shade or Traffic Decides in Oklahoma
St. Augustine vs zoysia comes down to two questions: how much shade, and how much foot traffic. One tolerates each — and they are not the same grass.
Fertilizer in Oklahoma
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Fertilizer · Oklahoma
Winterizer Fertilizer: Right Idea, Wrong Bag in Oklahoma
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 · Oklahoma
Lawn Soil pH: When to Lime, When to Add Sulfur in Oklahoma
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 · Oklahoma
When to Weed and Feed: Two Bags Often Beat One in Oklahoma
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 · Oklahoma
When to Fertilize: Autumn Matters More Than Spring in Oklahoma
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 · Oklahoma
Why Is My Lawn Yellow? 9 Causes, Not Just Nitrogen in Oklahoma
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 Oklahoma
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Lawn Care Guides · Oklahoma
Dormant Seeding: The Backup Window After You Missed Fall in Oklahoma
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 · Oklahoma
Lawn Recovery After Flooding: The Clock Starts Underwater in Oklahoma
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 · Oklahoma
Lawn Ruts After Storm Cleanup: What Repairs, What Doesn't in Oklahoma
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 · Oklahoma
Waterlogged Lawn: Test It Before You Fix It in Oklahoma
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 · Oklahoma
When to Stop Mowing the Lawn: Watch 50°F, Not the Calendar in Oklahoma
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 · Oklahoma
Winter Lawn Care: The Damage Happens in February in Oklahoma
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 · Oklahoma
Summer Lawn Care: What Helps and What Hurts in Oklahoma
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 · Oklahoma
Fall Lawn Care: What to Do, and in What Order in Oklahoma
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 · Oklahoma
How to Aerate a Lawn: Spike Tools Make It Worse in Oklahoma
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 · Oklahoma
How to Fix Bare Spots in a Lawn — Or Leave Them in Oklahoma
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 · Oklahoma
Lawn Mowing Height: Your Deck Setting Is Lying in Oklahoma
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 · Oklahoma
Should You Bag Grass Clippings? It Costs Nitrogen in Oklahoma
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 · Oklahoma
Spring Lawn Care: Do Less, and Do It Later in Oklahoma
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 · Oklahoma
When to Overseed Your Lawn — and When Not to Bother in Oklahoma
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 · Oklahoma
How Often to Water Your Lawn: Twice Beats Daily in Oklahoma
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 Oklahoma
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Product Reviews · Oklahoma
Best Weed Killer for Lawns: Match It to the Weed in Oklahoma
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 · Oklahoma
Organic Weed Killer for Lawns: The One That Works in Oklahoma
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.
Oklahoma Lawn Calendar
What your Bermuda lawn needs, season by season.
Spring
- Pre-emergent early March in the south, early April in the panhandle — and split it on sandy western ground
- Look for spring dead spot as bermuda greens up; the patches that stay brown are last winter's damage, not drought
- Iron rather than lime on alkaline western soils — yellow grass here is usually availability, not deficiency
- Wait for full green-up before the first bermuda feeding
Summer
- Feed bermuda monthly through August; leave buffalograss alone
- Mow bermuda low and often — 1 to 2 inches, never removing a third
- Spray only on calm mornings; Oklahoma wind makes drift the default risk, not an edge case
- Scout for armyworms from late July, especially after a wet spell
Fall
- Fall pre-emergent for Poa annua — the barrier that decides what next February looks like
- Last nitrogen on bermuda by late August so it hardens off before winter
- Broadleaf work waits for a calm morning; drift onto a neighbour's shelterbelt is the complaint that actually gets filed here
- Soil test through OSU before deciding between lime and iron
Winter
- Nothing on dormant bermuda — winter nitrogen is a direct cause of spring dead spot damage
- Spot-treat henbit and bindweed on mild days
- Plan spring dead spot fungicide timing now; it is applied in autumn for a disease you see in April
- Keep traffic off frozen dormant turf
Official Oklahoma resources
Three things every guide here eventually sends you to do — and all three answers are specific to Oklahoma 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
The land-grant lab that tests soil for residents here:
OSU Soil, Water and Forage Analytical Laboratory (SWFAL)Worth doing before buying lime in Oklahoma, because much of the western half is alkaline already — the test often says iron, not lime.
Why the number matters more than the bag: soil pH in Oklahoma.
Turfgrass research
Every guide here defers to your own land-grant programme somewhere. This is it:
OSU Extension Turfgrass ScienceOklahoma State University
Runs a Turfgrass Diagnostic Laboratory that accepts photo submissions as well as physical samples — useful for spring dead spot, which is diagnosed by the pattern rather than the blade.
Where their advice and a national rule of thumb disagree, follow theirs — they trialled it in 6a–8a.
Pesticide regulation
Pesticide authority sits with the state department of agriculture:
Oklahoma Department of Agriculture, Food & ForestryConsumer Protection Services — Pest Management
Restrictions we found printed on labels: Oklahoma product restrictions.
Municipal Watering Restrictions & Microclimates
Hyper-local drought regulations and watering schedules for major metropolitan areas in Oklahoma.
Lawn Health Newsletter
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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.