Every spring, Bermuda lawns across Arlington and the DFW area wake up from dormancy — and for some homeowners, the first thing they see is a cluster of perfectly circular dead rings scattered across what used to be a healthy lawn. Those rings didn’t appear overnight. They were set in motion the previous fall, when a soil-dwelling fungus quietly killed the roots and crowns while the grass was still going dormant. That’s spring dead spot, and it’s one of the most stubborn lawn diseases we deal with in North Texas. If your Bermuda is showing those familiar dead circles, here’s what’s happening and exactly how to recover. For severe cases, working with a professional lawn disease and fungus control service will get you ahead of the problem faster.
What Is Spring Dead Spot?
Spring dead spot is caused by a group of closely related soil fungi in the Ophiosphaerella genus — most commonly Ophiosphaerella herpotricha in our region. Unlike diseases that attack grass during the growing season, this one operates underground during late summer and fall. The fungus infects Bermuda roots, stolons, and rhizomes as the turf begins to go dormant in cooler weather. By the time temperatures drop enough to fully shut the grass down, the fungal damage is done. When spring arrives and surrounding Bermuda greens up, the infected areas simply don’t — because the root system that would support new growth was already destroyed.
Why Arlington’s Clay Soils and Cold Winters Make Bermuda Vulnerable
Arlington sits in the heart of North Texas, and the local soil and climate create near-ideal conditions for spring dead spot to establish and spread year after year.
- Heavy clay soils: Tarrant County is loaded with expansive clay. Clay drains poorly, holds moisture against roots for extended periods, and compacts easily — all of which stress Bermuda roots and give Ophiosphaerella the prolonged wet-soil environment it favors during the fall infection window.
- Dramatic temperature swings: North Texas falls are unpredictable. We can hit 85°F in early October and drop below 40°F two weeks later. Bermuda that isn’t fully hardened off before cold arrives is significantly more vulnerable to root infection.
- Cold winters: Unlike Houston or San Antonio, Arlington gets cold enough that Bermuda goes fully dormant each winter. That extended dormancy period is exactly when spring dead spot damage becomes visible — the infected areas simply never come back from dormancy like the rest of the lawn does.
- Established Bermuda monocultures: Most Arlington homes have solid Bermuda lawns — common or hybrid varieties — without much diversity. Once the fungus establishes in the soil, it has an uninterrupted food source season after season.
How to Identify Spring Dead Spot
Correct identification is the first step. Several lawn problems can cause dead circles in spring, and treating the wrong disease wastes time and money. Spring dead spot has a specific set of characteristics that set it apart:
- Circular dead patches: Spots range from about 6 inches to 3 feet in diameter and are nearly perfect circles. They may be small and scattered, or large enough to overlap into irregular shapes if the disease has been active for multiple years.
- Bleached, sunken appearance: Affected areas look straw-colored and slightly sunken compared to surrounding turf. The dead grass is matted down and doesn’t recover even as temperatures warm.
- Healthy green ring surrounding the dead area: This is one of spring dead spot’s most recognizable features. Bermuda growing right up to the edge of an infected circle often appears darker green than the rest of the lawn, because it’s taking up nutrients released by the dying roots in the spot.
- Black, rotted roots: Pull up dead grass from an affected circle and look at the roots and stolons. They will be dark brown to black and rotted — a sign of the fungal crown and root rot that characterizes this disease.
- Consistent year-to-year recurrence: If those dead circles appear in the same spots every spring, it’s almost certainly spring dead spot. The fungus persists in the soil and continues attacking the same areas unless it’s directly addressed.
Step-by-Step Recovery Plan
Recovering from spring dead spot takes patience. Because the damage occurs months before you see it, there’s no overnight fix. But with the right sequence of actions, most affected Bermuda lawns can recover by midsummer and be set up to avoid a repeat the following year.
Step 1: Core Aeration in Late Spring
Once soil temps have risen enough for Bermuda to actively grow (typically late April through May in Arlington), core aerate the entire lawn with extra attention to affected circles. Aeration does several things at once: it reduces the compaction that Ophiosphaerella thrives in, improves drainage in clay soils, and breaks up fungal mycelium in the top layer of soil. Use a machine aerator that pulls actual cores, not a spike aerator — spike aerators compact the surrounding soil and don’t provide the same benefit.
Step 2: Rake Out Dead Material
Dead grass in spring dead spot circles doesn’t decompose quickly and creates a physical barrier that prevents Bermuda from stolonizing back in. Use a stiff rake to remove as much dead material from within the circles as possible. This is also a good time to lightly scratch up the soil surface in the circles to encourage better seed-to-soil or stolon-to-soil contact.
Step 3: Overseed or Spot-Seed
Smaller circles often fill back in naturally as surrounding Bermuda stolons creep into the dead area — but only if there’s nothing blocking them. Larger circles (over 18 inches) may benefit from hand-broadcasting Bermuda seed directly into the prepared area. Use a common Bermuda seed variety that matches your existing turf. Keep seeded areas consistently moist for 2–3 weeks during germination. Note: hybrid Bermuda varieties like Tifway 419 don’t produce viable seed — if your lawn is a hybrid, Bermuda plugs or sod pieces placed in the circle will work faster than seeding.
Step 4: Balanced Fertility — Not Too Much Nitrogen
Fertilizing the recovering lawn correctly is critical. A complete fertilizer with nitrogen, phosphorus, and potassium supports new root growth and fill-in. Avoid heavy nitrogen-only applications in areas with spring dead spot — excess nitrogen promotes lush shoot growth while doing little for the root depth and density that resist future fungal infection. A slow-release balanced fertilizer applied as the lawn breaks dormancy gives recovering areas what they need without creating conditions that favor disease.
Step 5: Fungicide Application — Timing Is Everything
Here’s the part most homeowners get backward: fungicide applied to visible spring dead spot circles in spring won’t cure what’s already dead. The damage is done. Fungicide is a preventive tool for spring dead spot — it must be applied in the fall, when the fungus is actively infecting roots, not in spring when you see the results. Effective fungicide classes for spring dead spot include DMI fungicides (thiophanate-methyl, propiconazole) and SDHI products. Applications are typically made in September and again in October as soil temperatures drop below 70°F. Applying in spring to the visible spots is not effective for that season’s damage, though it may help reduce new soil inoculum.
Why Spring Dead Spot Keeps Coming Back
One of the most frustrating things about this disease is that it doesn’t go away on its own. Ophiosphaerella survives in the soil for multiple years, and each fall it attacks again. Homeowners who only rake out the dead spots and reseed without addressing the fungal population in the soil will see the same circles reappear next spring, often slightly larger. Year after year of untreated infection also causes the patches to expand as the fungus spreads outward from established colonies. True long-term control requires fall fungicide applications combined with improving soil drainage, reducing thatch (which the fungus colonizes), and maintaining proper turf health through balanced fertility.
For a related perspective on fall-active lawn diseases in North Texas, read our post on Why Large Patch Hits Zoysia in Fall, Not Summer, in North Texas — the timing window matters just as much for that disease as it does for spring dead spot treatment.
Prevention Starting This Fall
If your lawn had spring dead spot this year, fall is when you take back control. Here’s the prevention checklist:
- Schedule fall fungicide: Apply a preventive fungicide in September and again in early-to-mid October. Don’t wait until you see symptoms — by then the infection window has passed.
- Dethatch if needed: Thatch layers over ½ inch provide a habitat for Ophiosphaerella to overwinter. If your Bermuda has significant thatch, late-summer dethatching before fungicide applications improves product penetration and reduces the fungal reservoir.
- Improve drainage: If water pools in your lawn for more than 30 minutes after rain, address the drainage issue before fall. Aerating and topdressing with sand in heavy clay areas can improve infiltration significantly.
- Avoid late-season nitrogen: Fertilizing Bermuda with nitrogen after mid-August delays hardening off and extends the window when soft, succulent tissue is vulnerable to infection. Switch to a potassium-heavy fertilizer in late summer to harden the turf instead.
- Maintain proper mowing height: Don’t scalp Bermuda going into fall. Mowing too short stresses the root system and reduces the turf’s natural resistance to infection.
When to Call a Professional
If your spring dead spot circles have been expanding year after year, cover more than 20% of your lawn, or keep returning despite your own attempts at control, it’s time to bring in a professional. We’ve been treating North Texas Bermuda lawns since 2006 and have dealt with spring dead spot across hundreds of Arlington-area properties. We can confirm the diagnosis, set up a fall fungicide program with the right products and timing, and help you build a lawn fertility and drainage plan that reduces long-term disease pressure. Spring dead spot is one of the more stubborn lawn diseases in our area — but it’s very manageable with the right approach and the right timing.
Spring Dead Spot Ruining Your Bermuda?
Don’t wait for it to spread. We’ll diagnose it correctly and set up a recovery and prevention plan built for Arlington’s clay soils and climate.