7 Common LM Berea Lawn Problems and How to Fix Them
Yellow patches, thin growth, fungal disease, and more — here are the 7 most common LM Berea lawn problems Cape Town homeowners face, and exactly how to fix them.
7 Common LM Berea Lawn Problems and How to Fix Them
LM Berea is a tough, resilient grass — but even the best lawn can develop problems. The key is diagnosing the issue correctly and acting quickly.
Here are the 7 most common LM Berea problems Cape Town homeowners face, and exactly how to fix them.
1. Yellow or Brown Patches
What it looks like: Irregular yellow or brown areas scattered across the lawn.
Most likely cause: Under-watering. This is the most common cause of yellow patches in Cape Town, particularly in summer.
How to diagnose: Push your finger into the soil in the affected area. If the soil is dry below 2–3cm, under-watering is the cause.
How to fix:
- Increase watering frequency immediately
- Water deeply — aim for 20–30 minutes per zone
- Check that your sprinkler or irrigation system is covering the affected area evenly
Other possible causes:
- Fertiliser burn (if you recently fertilised and didn't water it in)
- Dog urine (circular patches with green ring around the edge)
- Compacted soil (grass thins gradually over time)
2. Circular Brown Patches (Fungal Disease)
What it looks like: Circular or ring-shaped brown patches, often with a darker border. May appear after wet weather or heavy watering.
Cause: Fungal disease, most commonly Brown Patch (Rhizoctonia solani) or Dollar Spot.
How to diagnose: Circular shape is the key indicator. Pull a blade from the edge of the patch — you may see brown lesions on the blade.
How to fix:
- Apply a lawn fungicide (available at garden centres)
- Reduce watering frequency and avoid evening watering
- Improve air circulation by thinning overhanging branches
- Avoid over-fertilising with nitrogen
Prevention: Water in the morning, not the evening. Avoid over-watering. Don't over-fertilise.
3. Lawn Not Establishing After Installation
What it looks like: Rolls don't knit together, grass turns yellow, rolls lift at the edges.
Cause: Insufficient watering during the establishment period (first 3 weeks).
How to diagnose: Lift a corner of a roll. If the soil beneath is dry and the roots haven't grown into the soil, under-watering is the cause.
How to fix:
- Increase watering to twice daily immediately
- Press the rolls firmly back into contact with the soil
- Keep the soil consistently moist until roots establish
Prevention: Water daily for the first 2–3 weeks after installation. Don't skip days.
4. Thin or Patchy Growth in Shade
What it looks like: Grass is thin, sparse, or patchy in shaded areas under trees or alongside walls.
Cause: Insufficient light. Even LM Berea has limits — very deep shade (more than 70%) will cause thinning.
How to fix:
- Thin out overhanging branches to let in more light
- Raise the mowing height in shaded areas (40–50mm)
- Reduce foot traffic in affected areas
- Consider ground cover plants for areas with very deep shade
5. Thatch Build-Up
What it looks like: The lawn feels spongy underfoot. Water runs off rather than soaking in. The lawn looks dull and doesn't respond well to watering or fertilising.
Cause: A build-up of dead grass stems and roots between the soil surface and the green blades.
How to diagnose: Part the grass and look at the base. If you see a thick layer of brown, spongy material between the green blades and the soil, you have thatch.
How to fix:
- Scarify (dethatch) the lawn in spring using a scarifying rake or mechanical scarifier
- The lawn will look rough immediately after but will recover quickly
- Follow up with fertilising and watering
Prevention: Scarify once a year in spring.
6. Weeds Invading the Lawn
What it looks like: Broadleaf weeds (clover, dandelions, oxalis) or grass weeds (sedge, annual meadow grass) appearing in the lawn.
Cause: A thin or stressed lawn allows weeds to establish. Weeds exploit gaps in the grass cover.
How to fix:
- For isolated weeds: hand-pull or spot-treat with a selective herbicide
- For widespread weeds: apply a selective lawn herbicide safe for LM Berea
- Address the underlying cause (thin lawn from under-watering, shade, or thatch)
Prevention: A thick, healthy LM Berea lawn is its own best weed defence. Good lawn care is the best prevention.
7. Lawn Damaged by Dogs
What it looks like: Circular brown patches (from urine) or worn, bare areas (from digging or running).
Cause: Dog urine contains high concentrations of nitrogen that burn the grass. Repeated running and digging causes physical damage.
How to fix:
- Water the affected area immediately after your dog urinates to dilute the nitrogen
- For bare patches, repair with fresh LM Berea rolls
- Consider designating a specific play area for your dog
Prevention: Water affected areas immediately after your dog uses the lawn. LM Berea recovers reasonably well from pet traffic — but no grass is completely immune.
When to Call a Professional
If you've tried the fixes above and your lawn is still struggling, it may be time to call in a professional. We offer lawn assessments and can advise on whether repair or replacement is the right approach.
Contact us for expert advice on your LM Berea lawn.
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