Why can't I use 2,4-D on centipede grass?

2,4-D will damage or kill centipede, particularly in hot weather. Centipede has very thin cuticles and absorbs 2,4-D readily. Use atrazine, Celsius WG, or atrazine-based southern weed-and-feeds instead. NEVER use Trimec, Spectracide Weed Stop, or any northern weed-and-feed on centipede.

How much fertilizer does centipede grass need?

Less than any other warm-season grass — 1 to 2 pounds of actual nitrogen per 1,000 square feet per year, max. Apply only when color demands it. Many centipede lawns get by with one application a year, or none at all. Over-fertilizing causes centipede decline, and there's no fix once it starts.

What is centipede decline?

Centipede decline is the slow death of a centipede lawn caused by too much nitrogen, soil pH above 6.5, excessive thatch, or all three combined. The lawn fails to green up in spring, yellows in summer, and never recovers. The fix is to stop fertilizing, drop pH with sulfur, and apply iron instead of nitrogen for color.

Should I lime my centipede lawn?

Almost never. Centipede thrives in acidic soil at pH 5.0 – 6.0. Lime raises pH and triggers iron chlorosis and centipede decline. Only apply lime if a soil test confirms pH below 5.0, and even then, use the smallest possible amount.

What's the safest weed killer for centipede grass?

Atrazine is the centipede workhorse — broadleaf control plus pre-emergent reach-back, applied under 85°F. Celsius WG handles tougher broadleaf weeds with no temperature limit. SedgeHammer (halosulfuron) handles nutsedge. Avoid all 2,4-D products, quinclorac, triclopyr, and MSMA.

Can I overseed centipede with rye for winter color?

It's not recommended. Annual rye competes hard for nutrients and water in spring just as centipede is trying to wake up — and centipede doesn't have the vigor to push through. Either accept the dormant brown color or apply a turf colorant for winter.

How often should I mow centipede grass?

Every 7–10 days during the growing season. Centipede is the slowest-growing warm-season grass, so it needs far less mowing than Bermuda or Zoysia. Maintain a consistent 1.5–2 inch height and never remove more than one-third of the blade per cut.

What temperature does centipede grass go dormant?

Centipede goes dormant when soil temperatures drop below 55°F, typically in late October through November in zones 7–10. It turns brown but stays alive through winter. Centipede is less cold-hardy than Bermuda and Zoysia — sustained freezes below 15°F can cause winterkill.

Warm SeasonZones 7 – 10Low Maintenance

The Complete Guide to
Centipede Grass

Centipede is the lowest-input warm-season grass in the country. Less fertilizer, less mowing, lower mowing height, and a completely different herbicide playbook than Bermuda or Zoysia.

Right now: slowing

October — Apply fall pre-emergent (split with August) for Poa annua control

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Bermuda·Zoysia·St. Augustine·Centipede·Fescue·KBG·Ryegrass·Bentgrass

Quick Reference

Mow Height

1.5 – 2"

Keep consistent year-round. Higher mowing reduces stress and weeds.

Water / Week

0.75 – 1"

Deep and infrequent. Drought-tolerant once established. Morning watering only.

N per Year

1 – 2 lbs

Per 1,000 sqft. Less is more — over 2 lbs causes centipede decline. Skip if soil is dark green.

Best Zones

7 – 10

Carolinas through Gulf Coast. Cold-sensitive — damaged below 5°F.

Soil pH

5.0 – 6.0

Acidic soil only. Iron chlorosis appears above 6.5. NEVER lime centipede unless a soil test demands it.

Sun Needs

Full Sun + Light Shade

Needs 6+ hours direct sun. Tolerates more shade than Bermuda but less than St. Augustine.

What makes Centipede different

Centipede is the 'lazy man's grass' — apple-green color, low growth habit, low fertility needs. It thrives where you'd think nothing would: acidic, sandy, low-fertility soils. Treat it like Bermuda (high nitrogen, lime, frequent mowing) and it dies — that failure has its own name: centipede decline. The herbicide playbook is closer to St. Augustine than Bermuda in one respect — no 2,4-D — but it diverges on the substitute: atrazine is centipede's workhorse and must NOT be carried across to St. Augustine, where Floratam is not tolerant of it (Texas A&M EHT-144).

Lowest fertility needsAcidic soil loverApple-green colorLow maintenanceSensitive to 2,4-DSlow-growing stolons

Month-by-Month Calendar

Tap a month

October

slowing

Mow

1.5 – 2" every 14 days

Water

Rainfall only unless drought

Fertilize

None

This month's tasks

Apply fall pre-emergent (split with August) for Poa annua control

Clean up leaves so they don't smother the lawn

Soil test every 2–3 years to confirm acidic pH

See the Centipede month-by-month playbook

The full Centipede calendar — every task, every month, with priority and timing for every season.

Open the Centipede calendar

Pre-Emergent Timing

Don't miss this window

Pre-emergent is the single most important application of the year. It prevents crabgrass, goosegrass and other weeds before they germinate. Once you see weeds, it's too late.

Spring (Crabgrass, goosegrass Prevention)

Critical

Apply when your 5-day average soil temperature reaches 55°F. Crabgrass seeds germinate when soil temperatures reach 55°F at the 4-inch depth for several consecutive days. Pre-emergent must already be down BEFORE that — once you see the first crabgrass blade, the chemical barrier is too late.

Typically late Feb – early Mar (zone 7 – 10)Varies by zone

Fall (Poa annua (annual bluegrass) Prevention)

Recommended

Apply when your 5-day average soil temperature reaches 70°F. Poa annua germinates as soil temps drop back through 70°F in fall. Apply your fall pre-emergent BEFORE that threshold to prevent the worst winter weed in southern lawns.

Typically Sep – early OctVaries by zone

Timing matters more than product. Too early and it breaks down before weeds germinate. Too late and crabgrass is already growing — pre-emergent can't stop what's already up. Track your local soil temperature, not the calendar date.

What to use

Prodiamine 65 WDG (Barricade)

Specialty

Rate: 0.18 oz per 1,000 sqft (split spring + fall)

The gold-standard pre-emergent. Safe across the board on centipede.

Scotts Halts Crabgrass Preventer

Home Depot

Rate: 2.7 lbs per 1,000 sqft

Big-box pendimethalin granular — safe for centipede. Stains concrete yellow, sweep hardscape after application.

Atrazine (Hi-Yield, Southern Ag)

Home Depot / Lowe's

Rate: Per label — typically 1 oz per 1,000 sqft

Atrazine gives 6–8 weeks of pre-emergent activity AND post-emergent broadleaf control. The centipede 2-in-1 product. Apply only when temps are below 85°F.

How to check your soil temperature

Use a soil thermometer at 2–4 inch depth, or check your local extension office's soil temp map. Look for the 5-day average, not a single reading — one warm day on a centipede lawn doesn't mean it's time.

What's Safe to Spray

Centipede handles most selective herbicides well. Here's what's safe and what to avoid — organized by where you'd buy it.

Safe for Centipede

✓

Scotts Halts Crabgrass Preventer

Pendimethalin

Big-box pre-emergent. Apply BEFORE soil hits 55°F at 4-inch depth. One of the few big-box products that's safe on centipede.

Safe

✓

Atrazine

Sold as Hi-Yield Atrazine, Southern Ag Atrazine, and in Bonus S Southern. The centipede workhorse — kills broadleaf weeds AND gives 6-8 weeks of pre-emergent reach-back. Apply only when temps are below 85°F.

Safe

✓

Image Kills Nutsedge

Imazaquin

The big-box nutsedge option for centipede. Slow acting (2–3 weeks) but effective on yellow nutsedge, dollarweed, and wild garlic.

Safe

Avoid — Will Damage Your Centipede

Scotts Turf Builder Triple Action

Benefin + 2,4-D + Dicamba (with fertilizer)

NOT safe for centipede. Contains 2,4-D and dicamba — both will damage centipede. Northern lawns only.

Unsafe

Scotts Turf Builder Weed and Feed

2,4-D + Mecoprop + Dicamba (with fertilizer)

NOT safe for centipede. Northern formula. Use Atrazine-based southern weed-and-feed instead.

Unsafe

Spectracide Weed Stop

2,4-D + MCPP + Dicamba

NOT safe for centipede. Standard 3-way will damage or kill centipede.

Unsafe

BioAdvanced All-in-One

2,4-D + MCPP + Dicamba + Quinclorac

NOT safe for centipede. Both the 2,4-D and the quinclorac will damage centipede.

Unsafe

Ortho WeedClear (Northern formula)

2,4-D + MCPP + Dicamba

NOT safe for centipede. Standard 3-way northern blend. Read the label before you spray.

Unsafe

A note on Weed & Feed products

Combo products like Weed & Feed are convenient — one bag, one application. But you'll get noticeably better results using fertilizer and weed control separately. Here's why:

Timing: Fertilizer and herbicide have different ideal application windows. A combo forces both at the same time, so one is always off-schedule.

Application: Herbicides work best as a spray that sticks to weed leaves. Granular weed & feed relies on granules physically touching each weed — inconsistent coverage.

Precision: Most lawns don't have weeds everywhere. Spraying weeds where they are costs less and puts fewer chemicals on your lawn than treating the whole yard.

Common Weed & Feed products you'll see at the store

Scotts Bonus S Southern

Granular combo (fertilizer + atrazine)

The big-box weed-and-feed for centipede. Atrazine handles broadleaf and gives pre-emergent reach-back. Apply only when temps are below 85°F. Use the low fertilizer rate.

Scotts Turf Builder Weed and Feed (Northern formula)

Granular combo (fertilizer + 2,4-D + dicamba)

WARNING: Northern weed-and-feed contains 2,4-D + dicamba. Do NOT use on centipede. Listed here so you can recognize and avoid the wrong bag at the store.

Image All-in-One Southern

Granular combo (fertilizer + sulfentrazone + penoxsulam)

Use the LOW rate on centipede — sulfentrazone can cause temporary thinning at full rate. Better suited to St. Augustine.

What to grab instead

Three separate products. Apply each on its own schedule. Better results, less waste, healthier lawn.

Fertilizer

A slow-release 5-1-2 ratio (e.g., 15-0-15) at 0.25 lb N per 1,000 sqft, applied ONLY when color demands it. Cap total nitrogen at 2 lbs per 1,000 sqft per year — over-fed centipede dies from centipede decline.

Pre-emergent

Prodiamine 65 WDG at 0.18 oz per 1,000 sqft. Apply when soil temps approach 55°F — before crabgrass germinates.

Post-emergent weed killer

Atrazine for general broadleaf and pre-emergent reach-back (under 85°F), Celsius WG for tough broadleaf, SedgeHammer for nutsedge. NEVER 2,4-D, NEVER Trimec, NEVER quinclorac, NEVER triclopyr on centipede.

Always read the product label before applying. Labels and formulations change — verify the active ingredient and grass safety on the bag before you spray.

Need to check a specific product?Herbicide Safety Checker →

Common Problems

Tap any issue to see symptoms, causes, and exactly how to fix it.

See something weird on your lawn?Ask Larry — send a photo →

Mowing Guide

Mowing is the single most impactful thing you can do for your Centipede lawn. Here's how to get it right.

Height: 1.5 – 2 inches

Centipede sits between Bermuda and St. Augustine in mowing height. Higher mowing means deeper roots, fewer weeds, and less stress. Drop below 1.5 inches and you'll scalp the runners and brown the lawn.

Frequency: Every 7–10 days

Centipede grows slowly compared to Bermuda or St. Augustine — every 7–10 days is plenty in peak season. Never remove more than 1/3 of the blade in one cut.

Don't scalp in spring

Unlike Bermuda, you do not scalp centipede in spring. Scalping removes the stolon network and triggers centipede decline. Just mow at your normal height once growth resumes.

Clippings: Mulch, don't bag

Centipede clippings break down fast and return nitrogen to the soil — perfect for a low-input grass that doesn't want extra fertilizer.

Sharpen blades every 25 hours

Dull blades tear centipede instead of cutting it. Torn tips turn yellow and stress an already-slow-recovering grass. A sharp blade makes a visible color difference.

Mow when the lawn is dry

Wet centipede clumps badly under the mower deck and the wheels leave tracks. Wet mowing also spreads brown patch from infected blades to healthy ones.

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