You just paid good money for a fresh pallet of St. Augustine sod. What happens in the next 30 days decides whether you get a dense green lawn or a patchy brown do-over. New sod care is not complicated, but it is unforgiving, especially in Pinellas County where summer heat, watering restrictions, and a four-month fertilizer ban all work against a lazy schedule.
This guide covers the first 60 days after a sod install in St. Petersburg: exactly how to water new sod in Florida, when you can mow it, when you can fertilize it (the legal answer, not the guess), and how to tell whether it is actually rooting. Everything horticultural here comes from University of Florida IFAS Extension publications. Everything legal comes from the City of St. Petersburg and Pinellas County.
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Day 0: what happens right after the install
Fresh sod is a living transplant with almost no root contact with your soil. UF/IFAS is blunt about the stakes: sod life on a pallet in summer is under 48 hours, and without proper post-installation care “the sod can die almost as easily as any other newly planted area” (Establishing Your Florida Lawn, ENH-03).
Check these things the day the crew leaves:
- Seams are tight with no gaps. Fill visible cracks with sod scraps or topsoil.
- The sod was rolled or tamped. Air pockets under the slabs dry roots out fast.
- The first deep soaking happened within 30 minutes of the last piece going down.
If any of these were skipped, fix them now. Water cannot rescue roots sitting over an air gap.
Weeks 1 and 2: keep the top inch damp
The number one killer of new sod in St. Pete is underwatering. The number two killer is overwatering. The IFAS schedule below is how you stay between the two.
Per UF/IFAS guidance for newly sodded lawns (ENH-03 and ENH5, St. Augustinegrass for Florida Lawns):
- Days 1 through 7 to 10: multiple short irrigations of 5 to 10 minutes throughout the day. The goal is to keep the top inch of soil damp, never soggy. In a June or July heat wave that can mean 3 to 4 cycles per day.
- Days 7 to 10 through day 20: once per day, applying 1/4 to 1/2 inch of water.
- Weeks 3 and 4: two to three times per week, still applying 1/4 to 1/2 inch each time.
- Weeks 4 to 6: the sod should be established. Shift to as-needed watering, which in Pinellas usually means watching for folded leaf blades and a blue-gray tint as the early drought signal.
The direction of the schedule matters. Frequency goes down over time while the volume per watering goes up. That trains roots to chase moisture deep into your soil instead of sitting in the top inch where St. Augustine stolons bake.
A quick calibration check: set a few tuna cans around the yard and time how long your system takes to fill them to 1/4 inch. That is your per-zone run time for weeks 2 through 4. If coverage is uneven, our irrigation service can help identify missed zones.
The Pinellas watering exemption for new lawns
Normal St. Pete watering rules would doom new sod. Pinellas County Utilities customers are currently on a one-day-per-week lawn watering schedule under SWFWMD’s Modified Phase III water shortage order (Pinellas County watering schedule and rules).
The good news: there is a formal establishment exemption for new plant material. Per the county:
- Days 1 through 30: irrigation may occur any day of the week.
- Days 31 through 60: follow SWFWMD’s standard establishment schedule.
- The exemption applies to potable, well, lake, and reclaimed water alike.
- A full irrigation zone may only run if 50 percent or more of that zone is new material. Partial plantings get hand watering only.
- Proof of the new lawn must be submitted online through Pinellas County Utilities customer service.
Two warnings. First, submit your proof of new sod the week it goes in, not after a citation shows up. The county is currently issuing a $193 citation for watering violations, doubling with each additional violation. Second, the county is actively advising against re-sodding during the current drought order. If you are scheduling an install, ask your water supplier about current restrictions before you book, because these rules change.
When can you mow new sod
The test is physical, not calendar-based. UF/IFAS says to begin mowing “as soon as the grass roots have pegged down and the grass will no longer lift when pulled on at the edges” (ENH-03).
Grab a corner of a slab and tug gently. If the piece lifts like a carpet, wait. If it resists, you are ready. In St. Pete’s warm months that usually lands around day 14 to day 21.
For that first mow:
- Sharpen the blade. A dull blade tears tender stolons instead of cutting them.
- Set the deck high. Floratam and other standard St. Augustine cultivars belong at 3.5 to 4 inches. Never scalp new sod.
- Mow when the grass is dry.
- Remove no more than one third of the leaf blade in a single pass.
If the sod arrived tall and shaggy, resist mowing early. Uprooting three slabs to fix shag costs more than looking at shag for a week. Once it is rooted, follow a consistent lawn mowing schedule.
When to fertilize new sod in Pinellas County
Generic advice skips the St. Pete twist. The standard rule from UF/IFAS: wait at least 30 days after sodding before applying fertilizer. Most sod was fertilized before harvest and has enough stored nutrients to carry it through establishment (ENH-03).
Now layer the local law on top. From June 1 through September 30, Pinellas County prohibits the sale and use of lawn fertilizer containing nitrogen or phosphorus (Pinellas County fertilizer and landscape information). The City of St. Petersburg runs the same ban citywide, confirmed in its annual notices (stpete.org).
Do the math for a summer install:
- Sod installed June 15: the 30-day wait ends July 15. The fertilizer ban runs through September 30. Your first legal nitrogen application is October 1.
- Sod installed in April: you clear the 30-day wait in May, inside the legal window. Fertilize before June 1 or wait until October.
If the sod looks pale during the ban, iron and other micronutrient-only products are legal year-round and will green it up without nitrogen. That is the workaround the city itself suggests: “fertilizer-free micronutrients in the summer.”
One more county rule that surprises people: phosphorus requires a soil test showing deficiency before it can be applied at all, any time of year. Skip the bag of 10-10-10.
Once you are past establishment, fold the lawn into a year-round schedule. Our St. Augustine maintenance calendar maps every feeding, mowing height, and pest window to Pinellas dates.
How to tell if the sod is rooting
You do not have to guess. Three checks, in order of reliability:
- The tug test. Gently pull a corner of a slab. Resistance means roots have anchored into your soil.
- Visual rooting. Peel back a corner and look underneath. White, threadlike roots growing down into the soil are exactly what you want. Mushy brown roots mean too much water.
- New growth. Fresh vertical leaf growth and visible stolon spread across seams tell you the plant is spending energy on expansion, not survival.
If a slab fails the tug test at week 3, check moisture under it. Dry soil underneath points to runoff or a missed zone. Saturated, smelly soil points to overwatering. Adjust that zone, not the whole schedule.
Common mistakes that kill new sod in St. Pete
- Watering once a day from day one. Shallow daily soaking in week one is not enough in 95-degree heat; the top inch dries between cycles.
- Watering at noon. Midday cycles lose a large share to evaporation. Run the multiple short cycles in the morning and early afternoon hours, and never late evening, which invites fungus.
- Mowing on day 10 because it looks tall. The tug test decides, not the calendar.
- Fertilizing inside the ban. A June install cannot get nitrogen until October 1. Plan for it.
- Letting foot traffic and pets roam in weeks 1 and 2. Every shifted slab is a seam that has to re-root.
- Ignoring chinch bugs. Stressed new Floratam is a chinch bug magnet. Watch for yellow patches that spread outward from hot, sunny edges.
FAQ: new sod questions St. Pete homeowners ask
How long does new sod take to root in Florida?
With the IFAS watering schedule, St. Augustine sod typically anchors enough to resist a tug test in 2 to 3 weeks and is fully established in 3 to 4 weeks (ENH-03). Cooler winter installs take longer.
How often should I water new sod in Florida?
Multiple short cycles of 5 to 10 minutes throughout the day for the first 7 to 10 days, then once daily for the next 7 to 10 days, then 2 to 3 times per week through week 4. That is the UF/IFAS establishment schedule.
Can you overwater new sod?
Yes. Saturated soil suffocates roots and fuels root rot and fungal disease. Keep the top inch damp, not muddy. If water pools or the soil smells sour, cut the run times.
When can I walk on new sod?
Stay off it as much as possible for the first 2 weeks. Light foot traffic is fine once slabs pass the tug test. Keep pets off until after the first mow.
Can I fertilize new sod during the Pinellas fertilizer ban?
No. The June 1 through September 30 ban prohibits nitrogen and phosphorus fertilizer regardless of lawn age. A June or July install waits until October 1 for its first feeding. Micronutrient-only products like iron are legal during the ban.
Why is my new sod turning yellow?
The three usual causes: underwatering (dry soil under the slabs), overwatering (mushy roots, sour smell), or nutrient fade after the pre-harvest fertilizer wears off. Yellowing during the summer ban gets iron, not nitrogen.
Should new sod seams be visible?
Visible seams are normal for the first few weeks. St. Augustine stolons grow across them and the lines fade by week 4 to 6 in the growing season. Seams with gaps wider than a finger need filling, or the edges will dry and curl.
The bottom line
New sod care in St. Petersburg comes down to four numbers: 5 to 10 minute waterings, multiple times a day, for the first 10 days. A tug test before the first mow at 3.5 to 4 inches. A 30-day wait before fertilizer, or October 1 if the summer ban is in effect. And a new-lawn exemption filed with the county so your establishment watering stays legal.
Follow that and your Floratam will be rooted, mowed, and feeding-ready inside six weeks.
If you would rather hand the whole schedule to a crew that does this every week, St. Pete Lawncare handles sod installation, establishment watering plans, and ongoing maintenance across St. Petersburg and Pinellas County. Get a free estimate or call (727) 218-4044, and we will put your new lawn on the right calendar from day one.