The Warm-Season Lawn Schedule: A Soil-Temperature Calendar for Bermuda and Zoysia
If you searched for a bermuda or zoysia lawn schedule, you probably wanted a calendar. Apply this in March, that in April, fertilize on Memorial Day, done.
I’m going to give you a schedule. But I’m going to hang it on soil temperature instead of the calendar, because the calendar is what gets warm-season lawns in trouble. March in a warm year and March in a cold year are two different lawns. The grass doesn’t read the calendar. It reads the ground.
This is the whole-year plan for bermuda and zoysia in the Southeast and the warmer transition zone: what to do, when to do it, and how much it costs. Every trigger is a soil temperature you can look up for free in about a minute. Every product is the generic version of what the lawn services and the big bags are selling you. Done at the budget tier, the entire year runs well under what a single visit from a service costs.
Jump to the quick-reference calendar
The one rule that runs the whole year
Here it is, and almost everything else hangs off it: do not put nitrogen on a warm-season lawn until the soil temperature at the 4-inch depth is consistently 65°F and rising. That’s straight out of UGA Extension Circular C 1088 (Martinez et al., 2022), and you’ll find the same number echoed across NC State and Clemson. In the Georgia Piedmont that’s usually early May, not March, not April.
Why it matters so much: nitrogen applied before the lawn is actively growing doesn’t feed the grass, because the grass isn’t awake yet. It feeds the weeds, and worse, it feeds Rhizoctonia solani, the fungus behind large patch, the single most common warm-season disease in the South. Spring nitrogen is the most reliable way I know to buy yourself a lawn full of orange circles. More on that below, and in the full large patch guide.
The flip side of the rule: the pre-emergent that stops your summer crabgrass goes down much earlier, on a colder trigger, in late winter while the lawn still looks dead. So the two biggest spring jobs happen at opposite ends of the warm-up, and if you treat them as one “spring” event you’ll get at least one of them wrong.
That’s the case for soil temperature over the calendar in one paragraph. Now let’s get the data for free.
How to read your soil temperature for free
You do not need to buy a soil thermometer, though a $15 one is a fair purchase if you want your own number. For most people the free route is enough. Punch your ZIP into a soil-temperature map and read the 2-inch and 4-inch values. I walk through the exact free tools, including the one I actually use, in how to check soil temperature for free.
Two depths matter for this schedule:
- 2-inch (surface) soil temp drives the spring pre-emergent. Crabgrass starts germinating as the surface holds the low-to-mid 50s°F and rising.
- 4-inch soil temp drives nitrogen. That’s the 65°F-and-rising green-up trigger.
Read it once a week in late winter and early spring. That’s the entire skill.
Bermuda and zoysia are not the same lawn
This schedule covers both grasses because they run on the same calendar logic, but they are not identical. Three differences change what you do.
Nitrogen appetite. Per UGA C 1088 Table 1, bermuda wants 2 to 5 lb of nitrogen per 1,000 sq ft per year, and zoysia wants 2 to 3. That bermuda range is wide on purpose: a low-input common bermuda lawn lives near the bottom, a hybrid bermuda pushed for color sits at the top. Zoysia is the lower-maintenance feeder. NC State AG-432 sets a not-to-exceed ceiling around 4 lb for zoysia, so the honest way to say it is “2 to 3 lb recommended, never more than about 4.” For a budget lawn, anchor low. Bermuda is the warm-season grass homeowners most often over-feed.
Mowing height. Both run 1 to 2 inches per UGA. Common bermuda is happy at 1.5 to 2 with a rotary mower. Hybrid bermuda and zoysia look best lower, but going under an inch means a reel mower, and on zoysia a low cut actually raises disease pressure. UGA notes large patch gets worse as zoysia mowing height drops from 1.5 inches toward 0.5. So don’t chase a putting green on a home zoysia lawn. It costs more and invites disease.
Disease pressure. Zoysia is one of the most large-patch-prone grasses in the region. Bermuda shrugs the disease off and grows out of it fast. This mostly changes your fall fungicide decision, covered below.
Everything else, the timing skeleton, is shared. Here’s the year.
The schedule, by soil temperature
I’ve written this as rounds keyed to triggers, the way a real program runs, not as fixed dates. Your dates will land earlier on the coast and later in the upper transition zone. Watch the ground.
Late winter: do nothing, but plan
While the lawn is dormant and brown, the highest-value move is free: pull a soil test. Extension consensus is to test every 2 to 3 years, and a state lab test runs about ten to twenty dollars. It tells you whether you actually need lime, potassium, or phosphorus, which stops you from buying inputs the lawn doesn’t want. I break down how to read the results in how to read a soil test. Lime, if the test calls for it, also goes down now, because it needs months to move pH.
Resist the warm-snap itch. A 75°F afternoon in February is not spring. Fertilizing or scalping on a warm week in late winter is the classic impatience mistake that sets the lawn back.
Round 1, surface soil low-to-mid 50s°F and rising: spring pre-emergent
This is the most important timing window of the year, and it happens while the lawn still looks dead. Crabgrass and goosegrass germinate as the surface soil warms through the mid-50s, with most of it coming up in the 60 to 70°F band. You want the barrier down before that. In practice that’s roughly mid-February on the coast and mid-March in the Piedmont, but read the soil, don’t trust the month. NC State AG-432 gives mid-February to early March for zoysia.
The product is prodiamine. It’s the active ingredient in the orange bag, sold by the small bottle for a fraction of the price. A season of prodiamine costs a few dollars per thousand square feet. Compare that to a summer of post-emergent crabgrass spraying after you miss the window, which is both more expensive and harder on the lawn.
Put down a split application: a first dose on the trigger, then a second at about half rate six to ten weeks later. The active ingredient starts degrading from day one, so the split keeps the barrier intact through the entire germination window. It’s the single most effective tweak for season-long crabgrass control, and it’s extension-endorsed.
Round 2, at green-up: the spring scalp
When the lawn is clearly waking up and pushing green, drop the mower and cut off the dormant brown tissue. This is the spring scalp, and it speeds and evens out green-up by getting sunlight to the soil. Bag the clippings.
Two cautions. Don’t scalp early. If a late frost hits freshly exposed crowns with no canopy to protect them, you’ve hurt the lawn. And go easy on zoysia, which recovers slowly. NC State describes the zoysia version as the first spring mow set “as low as possible without scalping.” Bermuda takes a harder reset than zoysia does.
Round 3, 4-inch soil consistently 65°F and rising: first nitrogen
Now, and not before, the fertility program starts. This is the rule from the top of the article. In the Piedmont it’s usually early May. Zoysia greens up later and slower than bermuda, so be even more patient with it.
Start light. A half pound of nitrogen per 1,000 sq ft about three weeks after green-up is plenty for the first feeding, per NC State AG-432. The active ingredient here is just nitrogen, and the cheapest honest sources are urea (46-0-0) or a urea-plus-ammonium-sulfate blend. The bag math is unforgiving once you see it: generic urea runs a fraction of the cost per pound of actual nitrogen compared to a branded turf fertilizer, for the identical element. If you’d rather spread a slow-release granular and not think about it, that’s a legitimate Minimalist choice, and Milorganite is a defensible pick at that tier. You’ll pay more per pound of N for the convenience and the slow release. That’s a real tradeoff, not a scam.
Rounds 4 through 6, May through August: the fertility run
This is the warm-season feeding season. UGA lists May, June, July, and August as the core fertility months for both grasses. Space the feedings four to six weeks apart and hit your annual nitrogen target across them.
- Zoysia: aim for about 2 lb of nitrogen for the year on an established lawn, up to 3 if you’re pushing it. That’s roughly a half to one pound per feeding across three feedings. Never run past about 4 lb for the year.
- Bermuda: 2 to 3 lb for a normal home lawn, more only if it’s a hybrid you’re mowing low and pushing hard. Common bermuda at the low end looks fine and stays out of trouble.
Two optional add-ons in this stretch, both covered in their own guides:
Iron for color, not more nitrogen. If you want the lawn darker without forcing a growth flush, iron is the frugal move. Ferrous sulfate is pennies per application and greens the lawn up within a day or two. It’s how you get color without piling on nitrogen you don’t need. Details in iron for lawns.
A growth regulator, if you’re the type. Trinexapac (generic T-Nex, same chemistry as Primo MAXX) slows vertical growth, thickens the turf, and cuts your mowing. It’s not a beginner product and it’s not required, but for the obsessive it’s one of the highest-payoff inputs there is. The honest walkthrough is in the PGR guide.
Through the summer: water right, rescue weeds only if needed
Warm-season grass wants about an inch of water a week, rain included, applied deep and infrequent rather than light and daily. Early morning only, which also cuts disease. The full method, including the free tuna-can test to calibrate your sprinkler, is in how much water your lawn actually needs.
If crabgrass broke through anyway, that’s a rescue situation, not a schedule item, and the playbook is in crabgrass rescue. A note that can save your lawn: the cheap rescue herbicides are not all safe on every grass. If you’re on centipede or St. Augustine, read that guide before you spray anything.
Fall, soil cooling toward 70°F: the season’s most-skipped jobs
Fall is where good warm-season lawns are won, and it’s the part most homeowners skip because the lawn still looks fine.
Fall pre-emergent, around 70°F and falling. The same crabgrass logic runs in reverse for winter weeds. Annual bluegrass (Poa annua), chickweed, and henbit germinate as the soil cools through about 70°F in late summer or early fall. A prodiamine application then stops the winter weeds that otherwise wreck your dormant lawn’s look from December through March. If Poa is your particular nemesis, there’s a dedicated Poa annua guide.
Fall potassium, not nitrogen. This is the one most people get backwards. You stop nitrogen in fall, because late nitrogen pushes tender growth into the first frost and feeds disease. Instead, NC State AG-432 calls for about 1 lb of potash (K2O) per 1,000 sq ft in the September-to-November window for winter hardiness. Potassium is the winter-survival nutrient. It’s cheap and it’s the right last feeding of the year.
Fall fungicide, zoysia only, and only if you’ve had large patch. Here’s where bermuda and zoysia part ways. If your zoysia has a history of large patch, a preventive fungicide when the soil drops through about 70°F, with a second application 21 to 28 days later, is what actually prevents it (NC State AG-432). Bermuda rarely needs it. And for most homeowners, large patch is won with the cultural levers, the water timing and the nitrogen timing this whole schedule is built around, not with a fungicide. The full economics are in the large patch guide. Don’t buy fungicide you don’t need.
Winter: dormancy
The lawn goes brown and dormant. There is nothing to buy and nothing to spray. Sharpen the mower, clean the sprayer, and read your soil test. The next move is Round 1, on the trigger, not the date.
What the whole year costs
Here’s the part the lawn services don’t want framed this way. The entire program above, done at the budget tier, is a generic-chemistry program that costs less per year than one or two service visits.
Tier 1: Cheapest (you own a sprayer and a spreader)
Generic prodiamine, generic urea or ammonium sulfate for nitrogen, ferrous sulfate for color, and generic azoxystrobin plus propiconazole only if your zoysia needs the fungicide rotation. The active ingredient is the product. The brand is the markup. For a typical home lawn this runs somewhere in the low hundreds for the entire year, and most of that is one-time concentrate that lasts multiple seasons. The cost is effort: you measure, you mix, you spray.
Tier 2: Middle (granular, less mixing)
Spread a slow-release nitrogen like Milorganite, use granular prodiamine, and reach for Scott’s DiseaseEx (granular azoxystrobin) if you want a spreader-only fungicide. You pay more per pound of nitrogen and per treatment for the convenience of not mixing liquids. A community “basic plan” I’ve seen passed around the zoysia groups runs about $556 a year at 10,000 sq ft built this way, and most of that premium is the branded slow-release fertilizer and the nice-to-have biostimulants. The FLG version of that same plan, swapping generics for the branded chemistry and skipping the unproven add-ons, lands closer to $150 to $200 for the year.
Tier 3: Done-for-you (you don’t want to touch it)
This is where you hire it out, and that’s a legitimate choice if your time is worth more than the gap. Just know what the gap is. A national lawn service runs roughly $475 a year for a 5,000 sq ft lawn, applying the same active ingredients, prodiamine, 2,4-D, urea, bifenthrin, that you can buy yourself. I did the full breakdown in how much a lawn service actually costs. The chemicals aren’t the expensive part. The truck and the labor are.
The program I actually run
My lawn is zoysia in Peachtree City, Georgia, Zone 7b, and this schedule is the one I run on it, not a theoretical one.
I don’t fertilize on a date. I watch the 4-inch soil temperature on weather.uga.edu and hold nitrogen until it’s parked at 65°F and climbing, which down here is usually early May. My pre-emergent goes down weeks before that, in late winter, prodiamine in a split application, because I’d rather put the barrier down a little early than a day late.
Large patch is the disease I take most seriously, because zoysia is prone to it and I mow at 1 inch on a reel, which leaves no margin. My prevention is mostly free: water deep and only in the early morning, hold nitrogen until the soil says go, and keep the mowing height honest. When I do spray, it’s a generic azoxystrobin and a generic propiconazole on a rotation, mixed in my 4-gallon battery backpack sprayer at 2 gallons of water per thousand square feet so the product actually reaches the soil line. For color through the summer I lean on iron in the tank rather than reaching for more nitrogen.
Fall is potassium, not nitrogen, and a fall pre-emergent for Poa. Then the lawn goes brown and I leave it alone until the ground tells me it’s time again.
Anti-patterns: the mistakes this schedule exists to prevent
- Spring nitrogen before 65°F. The number-one warm-season mistake. It feeds weeds and large patch, not your grass. Wait for the soil.
- Fall nitrogen. Late N pushes tender growth into frost and disease. Fall is for potassium.
- Calendar pre-emergent. “I always do it in March” misses the window in a warm year. Watch the surface soil temp.
- Skipping the split pre-emergent. One application degrades before the germination window closes. The half-rate follow-up is what gets you season-long control.
- Scalping too early, or scalping zoysia hard. A late frost on exposed crowns, or a deep scalp on slow-recovering zoysia, costs you weeks.
- Over-feeding. Bermuda gets over-fertilized for color; zoysia rarely needs more than 2 lb a year. More nitrogen is not more lawn. It’s more mowing, more thatch, and more disease.
- Mowing zoysia too low. Chasing a golf-course height on a home zoysia lawn raises large patch pressure. Stay at the high end of the range.
Quick reference: the year on one screen
The rule: nitrogen only after 4-inch soil temp is consistently 65°F and rising. Pre-emergent earlier, on the surface-soil mid-50s trigger.
- Late winter (dormant): soil test, lime if called for, plan. Do not fertilize on a warm snap.
- Surface soil mid-50s and rising: spring pre-emergent (prodiamine), split application, second dose at half rate 6 to 10 weeks later.
- At green-up: spring scalp, bag clippings. Gentle on zoysia.
- 4-inch soil 65°F and rising: first nitrogen, light (about 0.5 lb N/1,000).
- May to August: fertility run, 4 to 6 weeks apart. Zoysia about 2 lb N/year, bermuda 2 to 3. Iron for color. Optional PGR.
- Summer: about 1 inch water/week, deep and early-morning. Rescue weeds only as needed.
- Soil cooling toward 70°F (fall): fall pre-emergent for Poa and winter weeds.
- September to November: about 1 lb potash/1,000 for winter hardiness. No fall nitrogen.
- Fall (zoysia with a large-patch history only): preventive fungicide at ~70°F, second app 21 to 28 days later.
- Winter: dormancy. Nothing to buy.
Annual cost, 5,000 sq ft, rough: Tier 1 generic DIY, low hundreds with multi-season concentrate left over. Tier 2 granular convenience, more. Tier 3 hire it out, around $475 a year for the same active ingredients.
Pick your level and start on the next trigger, not the next date. The grass reads the ground, and now so do you.
Products Mentioned in This Article
- Prodiamine 65 WDG (spring and fall pre-emergent) — Buy it
- Ammonium sulfate / urea (nitrogen source) — Buy it
- Chelated liquid iron (color without a nitrogen flush) — Buy it
- Generic azoxystrobin (large patch, fungicide group 11) — Buy it
- Propiconazole 14.3 (rotation partner, fungicide group 3) — Buy it
- T-Nex (trinexapac, generic PGR) — Buy it
- Scott’s DiseaseEx (granular azoxystrobin, the spreader-only option) — Buy it
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