Ornamental · Poaceae
Bahiagrass
Paspalum notatum
Tough, drought-proof, and happy in poor sandy soil, bahiagrass holds ground where finer lawns give up.
Full sun
Every 3–7 days
60–90 days
USDA 7–11
Overview
Bahiagrass is a warm-season perennial whose deep, far-reaching roots are exactly why it copes so well with drought. Its home is South America, and it spread through the warm, sandy lower South, where you'll find it doing duty as lawn, pasture, and roadside cover. The giveaway is those tall seedheads that split into two prongs and fork into a Y above the turf.
The really handy thing about it is how undemanding it is. It does great in infertile, acidic, sandy soil that would leave other grasses starving, gets along on light feeding, and seldom wants watering once it's settled. The flip side is an open, coarse, light-green turf instead of a thick carpet, plus a steady parade of seedheads all summer.
Think of this as a grass built for doing a job rather than looking pretty. Hand it full sun and room to spread and it'll crowd out weeds and lock a slope in place with hardly any effort from you. But ask it to pass for a fine lawn and you'll be out there mowing weekly and still chasing seedheads.
Care
The short version: full sun, infertile acidic sandy soil, and barely any water once the roots are in. Keep the mower high at 3 to 4 inches, feed it lightly, and count on mowing often through summer to stay on top of the seedheads.
Light
Bahiagrass really needs full sun to thrive, and it just won't hold a stand in the shade. The more direct sun it soaks up, the thicker and more weed-resistant the turf stays.
Water
Once it's rooted, you'd be hard pressed to find a more drought-tolerant lawn grass, all thanks to those deep roots. Water it only when it needs it, somewhere around half to three-quarters of an inch each time, and when a dry spell hits, just let it brown out and go dormant instead of fighting it. New plantings are the exception, so give them regular water for the first 2 to 3 weeks.
Soil
It genuinely likes infertile, sandy, acidic ground where pickier grasses give up, and the sweet spot sits around pH 5.5 to 6.5. Let the pH drift much higher and the grass turns yellow and stalls out, so keep things on the acidic side.
Temperature
Being a warm-season grass, it greens up when it's hot and browns off when it's cold, taking a range of roughly 19°F to 100°F (-7°C to 38°C). Through winter, within its hardiness range, it goes dormant rather than dying back.
Humidity
For an established lawn, outdoor humidity isn't something to fuss over. What counts more is letting the blades dry out between waterings, since blades that stay wet are what bring on dollar spot.
Feeding
Bahiagrass is a light feeder, asking for only about 1 to 2 pounds of nitrogen per 1000 square feet a year across the spring and summer growing stretch. Where the soil runs high in pH, a shot of iron as ferrous sulfate clears up the yellowing that lime-heavy ground tends to cause.
Pruning
Keep the mower high, at 3 to 4 inches, and never shave off more than a third of the blade in a single pass. All summer long the tall Y-shaped seedheads pop up within days, so plan on mowing often to keep them down, and keep that blade sharp, because the tough stalks dull it in a hurry.
Repotting
none
Size & spacing
Mowed, the turf itself stays low at 3 to 4 inches (8 to 10 cm), while each plant spreads 1 to 3 feet (30 to 100 cm) to tie the stand together. Plant or sprig with that spread in mind and the cover fills in without leaving long bare stretches.
When to plant
Bahiagrass needs warm soil before it'll really move. Sow seed or lay sod anywhere from spring into early summer so the stand gets the full warm season to root and fill in before the cool weather puts the brakes on.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Seed or sod in spring to early summer once soil is warm, allowing establishment before cool weather
- Harvest: Summer; tall two-spike Y- or V-shaped seedhead racemes
Hardiness
USDA hardiness zones: 7–11
Temperature: down to -18°C
Troubleshooting
Good news: most bahiagrass problems are just cosmetic and easy to spot once you know what to look for. Seedheads, yellowing, thin patches, and small pale spots each trace back to a clear cause. Find the match below, then jump on it before it gets worse.
Fast-wilting spots over soft, tunneled ground
Nothing chews up bahiagrass quite like mole crickets, which tunnel through the root zone and snack on the roots along the way. To be sure they're the culprit, try a soap flush: stir 1 to 2 ounces of lemon dish soap into 2 gallons of water, pour it over a 2-square-foot patch, and watch the crickets come up within minutes. Hit the young nymphs in early summer before their numbers take off, and keep the turf strong so it can ride out a bit of light feeding.
Fix:
- Treat for mole crickets when young nymphs are active in summer
- Keep turf healthy so it can outgrow light feeding
Little pale circles dotted around the turf
Those coin-sized pale patches are dollar spot, a fungus that moves in when the grass is hungry for nitrogen and the blades stay damp from dew. Check the blades for lesions with hourglass-shaped bands and you'll know for sure. A light feeding of about half a pound of nitrogen per 1000 square feet gives the grass the push it needs to grow past it, and watering early enough that the blades dry by evening stops it spreading.
Fix:
- Apply a light nitrogen feeding (about 0.5 lb N per 1000 sq ft)
- Water early in the day so blades dry quickly and avoid evening irrigation
Forked seedheads popping back up just days after a mow
Don't panic when you see those forked stalks, because they're just what bahiagrass does, and they come up quickest during the long days of summer. Keeping them in check is mostly a matter of mowing every 7 to 14 days, and you'll want a sharp blade since those tough stems wear an edge down fast. Want something neater? The Argentine type sends up fewer and shorter seedheads than the common ones.
Fix:
- Mow frequently in summer (every 7 to 14 days) to keep seedheads down
- Keep a sharp, heavy-duty rotary blade because the tough seedstalks dull blades
- Choose Argentine for fewer, shorter seedheads if a tidier look is wanted
Pale blades with greener veins on chalky ground
What you're looking at here is iron chlorosis, which crops up once the soil pH creeps past 7.0 and ties up the iron so the grass can't reach it. The quick fix? About 2 ounces per 1000 square feet of ferrous sulfate brings the green back in a matter of days, and you can repeat it every 6 weeks or so if the yellow comes back. Longer term, just keep the soil acidic and skip the lime.
Fix:
- Apply ferrous sulfate at about 2 oz per 1000 sq ft, repeating roughly every 6 weeks as needed
- Avoid raising soil pH; do not over-lime
Toxicity
A bahiagrass lawn is safe for pets and people, and it isn't on the ASPCA toxic-plant lists. The only things to watch are grazing animals, since the summer seedheads can carry an ergot fungus, and anyone with hay fever who reacts to the pollen. Mow those seedheads off and the grazing risk disappears completely.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A bahiagrass lawn is perfectly fine for cats. Sure, a few chewed blades might cough up a little hairball like any grass would, but there's no toxin in the plant to worry about.
Dogs None
Let the dogs run and roll on bahiagrass to their heart's content. The blades hold nothing poisonous, and the grass stands up nicely to paws and rough play.
Horses Moderate
The grass makes good forage and is safe to graze on its own. The catch is the summer seedheads, which can pick up an ergot fungus that brings on tremors and a wobbly, staggering walk. Mow those seedheads off and the danger leaves with them, and a horse that's been affected settles down once it's off the pasture.
Rabbits Safe
Rabbits can graze bahiagrass happily, since there's no toxin in either the leaves or the roots.
Livestock Moderate
Cattle, goats, and sheep all graze bahiagrass widely as pasture. The only thing that causes trouble is ergot-infected seedheads, which can trigger paspalum staggers, a shaky and off-balance condition. Keep those seedheads mowed and the worry goes away.
Birds Safe
Birds happily peck at the seed and forage over bahiagrass with no harm done.
People Safe
You can walk, sit, and play on a bahiagrass lawn without concern. The one thing to keep in mind is that its pollen can set off hay fever, so anyone sensitive might want to mow before the seedheads open up.
Safe as a lawn for pets and people. Two grazing-only nuances: grass pollen is allergenic to sensitive people, and for livestock the Paspalum seedheads can be infected with ergot (Claviceps paspali) whose sclerotia cause paspalum staggers (tremors and incoordination) in grazing cattle and horses. Mowing off seedheads removes this risk; it does not affect pet or human safety of the lawn.
Varieties
Just a handful of named types cover most plantings, and which one fits depends on whether you're after a tidier lawn or tougher pasture. Here are the ones worth getting to know.
Pensacola
This is the one you'll see most often, with narrow leaves and real cold tolerance, though all that toughness comes with tall, plentiful seedheads.
Argentine
With wider blades, this type weaves into thicker, more even sod and throws fewer, shorter seedheads, so it's the neater choice for a lawn even if it's a bit softer on cold.
Tifton 9
An improved Pensacola selection that USDA-ARS and the University of Georgia bred for sturdier seedlings and longer leaves, raised mostly for pasture and forage.
TifQuik
A quick-germinating member of the Pensacola line that settles in fast for pasture and forage use.
How to propagate
As warm-season grasses go, bahiagrass is one of the easier ones to get started, whether you sow it from seed or roll it out as sod. Either route, a little patience helps, since it takes its time knitting into full cover.
SeedEasy
Spring to early summer when soil is warm · Several weeks to a few months; scarified seed speeds germination
Here's a nice perk: bahiagrass is one of the few warm-season lawn grasses you can grow straight from seed, so that's how most new stands get going. Put it down from spring to early summer once the soil has warmed up, and give it several weeks to a few months to fill in, because it's a slow germinator. If you can track down scarified seed, it'll come up quicker.
DivisionModerate
Warm season; spring to summer · A few weeks for sod to root; plugs and sprigs are slow to fill in
Going with sod, sprigs, or plugs during the warm months gets you coverage faster than seed does, and sod roots down in a few weeks. The catch? Bahiagrass won't ever form tight, uniform sod slabs, and plugs take their time knitting together into a solid stand.
Myths
Bahiagrass makes a fine, manicured lawn like Bermuda or St. Augustine.
Truth is, it makes open, coarse, light-green sod and keeps throwing up tall Y-shaped seedheads right through summer, so it'll never look like a carpet no matter how much you mow. Where it really shines is big, low-maintenance ground such as pastures, roadsides, and erosion control, where being tough and drought-proof matters way more than a clean finish.