Centipede Grass on the Grand Strand: Why Fall Fertilization Looks Different in Myrtle Beach
Centipede Grass on the Grand Strand: Why Fall Fertilization Looks Different in Myrtle Beach
Short Answer: Around Myrtle Beach, many lawns are centipede grass, and centipede is one of the few lawn grasses that can be harmed by too much fertilizer, especially late in the season. Clemson Extension recommends light nitrogen for centipede during the summer growing season and no nitrogen in fall. St. Augustine, zoysia, and Bermuda are also slowing down in November and are prone to large patch disease, so heavy late nitrogen does more harm than good. Here is what we have found works best: skip nitrogen on centipede this month, keep any feeding on other grasses light, and focus fall effort on weed and disease prevention.
If you are reading this, you may have noticed that a lot of lawns around Myrtle Beach do not look like the thick, dark green lawns in fertilizer ads. Many are a lighter, apple-green color with a soft, low texture. That is often centipede grass, and it is one of the most common lawn grasses on the Grand Strand.
Centipede is popular for good reason. It handles sandy soil, needs less mowing than many grasses, and does not demand much fertilizer. But that last point matters a lot in November, because centipede is one of the few lawn grasses that can actually be hurt by being fed too much at the wrong time.
The Grasses of the Grand Strand
Lawns from North Myrtle Beach and Little River down through Carolina Forest, Surfside Beach, and Murrells Inlet are almost all warm-season grasses. Centipede is extremely common, especially in established neighborhoods. St. Augustine is popular in many coastal yards. Zoysia shows up in newer and higher-end landscapes. Bermuda is common on sunny lots, golf course communities, and newer subdivisions.
All of them grow best in the heat of summer, slow down as temperatures cool in fall, and go dormant or semi-dormant after the first frost, which usually arrives sometime in November or December on the coast and earlier inland.
Why Centipede Is Different
Centipede is adapted to low-fertility, acidic, sandy soils, which describes much of coastal South Carolina. It grows well with very little nitrogen. Too much nitrogen, especially late in the season, can lead to a condition often called centipede decline, where the lawn thins and dies back in patches, especially after winter.
Clemson Cooperative Extension guidance for centipede recommends light nitrogen applications during the summer growing season and avoiding nitrogen in fall. That means November is not the time to feed centipede.
Potassium and Centipede
Potassium helps centipede tolerate stress and cold. Clemson guidance notes that centipede often benefits from potassium, and in some cases a fall potassium application is recommended where soil tests show it is low. A soil test is the best way to know.
Phosphorus and pH for Centipede
Centipede does not need much phosphorus, and many coastal soils already have enough. Centipede also prefers acidic soil, generally around pH 5 to 6. Adding lime to centipede without a soil test showing a need can raise pH too high and cause problems, including iron deficiency and yellowing.
St. Augustine: Light Touch in November
St. Augustine is slowing down in November and is highly susceptible to large patch, a fungal disease that thrives when temperatures drop into the 60s and 70s and the grass stays wet. Heavy nitrogen now produces soft, lush growth that the disease attacks easily. Here is what we have found works best. Finish the main nitrogen feedings for St. Augustine by late summer or early fall. If anything goes down in November, keep it light and slow-release.
Zoysia: Even More Cautious
Zoysia is very prone to large patch in fall and spring. It generally needs less nitrogen than St. Augustine and Bermuda, and late-season feeding raises disease risk. Most zoysia lawns are best left unfed in November.
Bermuda: Winding Down
Bermuda is heading toward dormancy in November. Late-season nitrogen pushes growth the grass cannot use, and it can make Bermuda more susceptible to winter injury and spring dead spot, a disease that shows up as dead circles in spring. Bermuda’s main feedings belong in late spring and summer.
How to Tell Which Grass You Have
Centipede has medium-width blades, a light apple-green color, and runners that creep along the soil surface like little centipedes. St. Augustine has wide, flat blades with rounded tips and thick runners. Zoysia is dense and stiff, with blades that feel almost prickly. Bermuda has fine blades and runners that creep into beds and sidewalk cracks.
Seasonal and Rental Properties
Many Grand Strand homes are second homes or vacation rentals. If your lawn is managed on a schedule while you are away, make sure the plan reflects your grass type. A centipede lawn fed on the same schedule as a neighbor’s Bermuda can decline quickly.
Iron for Color
If your lawn looks a bit yellow heading into the holidays, iron can deepen the color without the growth push of nitrogen. That is especially useful for centipede and St. Augustine, and it is a safer fall tool than extra nitrogen.
Sandy Soil and Leaching
Much of the Grand Strand has deep, sandy soil that drains quickly and holds few nutrients. Quick-release nitrogen can move through sand with heavy rain or irrigation, past the roots and toward groundwater, the Waccamaw River, the Intracoastal Waterway, and the marshes. Moderate rates and slow-release nitrogen reduce that risk.
Keep It Off Pavement and Away From Water
Granules that land on driveways and sidewalks wash into storm drains, and many coastal drains lead quickly to ponds, swashes, and the ocean. Sweep stray granules back onto the lawn, and keep fertilizer away from pond edges and marsh buffers.
Watering in Fall
As temperatures cool, warm-season lawns need much less water. Overwatering in fall encourages large patch and weeds. Water only when the lawn needs it, early in the morning.
Mowing Heights
Centipede does best around one and a half to two inches. St. Augustine around three and a half to four inches. Zoysia and Bermuda at the heights recommended for their varieties. Avoid scalping before winter.
Spread It Evenly
If you do apply a light fall feeding to St. Augustine, set the spreader at half the label rate and make two passes at right angles for even coverage. Heavy strips of nitrogen in fall are where large patch often starts.
A Soil Test Is the Best Guide
Clemson Cooperative Extension offers soil testing, and the results show pH, potassium, and phosphorus levels along with recommendations. For centipede in particular, a soil test helps you avoid adding lime or phosphorus the lawn does not need.
Fall Is About Prevention
For most Myrtle Beach lawns, the most valuable fall work is weed and disease prevention, not fertilizer. Winter weeds start growing now, and large patch is active in fall.
Common Mistakes
A few patterns come up every fall on the Grand Strand. Feeding centipede like St. Augustine or Bermuda. Applying a heavy winterizer in November because the bag says winterizer. Liming centipede without a soil test. And leaving summer irrigation schedules running into fall.
What a Well-Matched Fall Looks Like
Imagine your yard next spring. The centipede greens up evenly, without the dead patches that showed up last year. The St. Augustine out front is free of the brown circles from large patch. Nothing was pushed, and each grass got only what it needed.
What to Do Next
Identify your grass first. For centipede, skip nitrogen this month and consider potassium only if a soil test calls for it. For St. Augustine, keep any feeding light and slow-release. For zoysia and Bermuda, skip late nitrogen. Use iron for color, cut back irrigation, mow at the right height, and focus on weed and disease prevention.
If you would rather have someone else handle the timing decisions, product selection, and application for your Myrtle Beach lawn, we are here for that. Lawn Squad of Myrtle Beach serves homeowners across the Myrtle Beach area. Visit lawnsquad.com to request a free quote. Our VitaminLawn program is built for the grass types, soils, and weather patterns we deal with here.
Here is what to expect. We will look at your grass, talk through how your lawn handled this year, and explain what we would apply before winter and why. If your lawn does not need a late-season application, we will tell you that honestly.
