Why Is My Lawn Turning Yellow? Common Causes & Fixes

A yellowing lawn is often a sign of stress, disease, or improper care. Understanding the root cause will help you restore your grass to a lush green state.

1. Common Causes of Yellow Grass

1. Lack of Nutrients

Grass needs nitrogen, potassium, and phosphorus to stay healthy. A deficiency, especially in nitrogen, causes pale, yellowing blades.

2. Overwatering or Underwatering

• Too much water drowns the roots, leading to yellow, waterlogged grass
• Too little water causes dehydration and dry, yellow patches

3. Lawn Disease & Pests

Fungal infections like red thread or rust disease can cause grass to turn yellow. Chafer grubs and leatherjackets feeding on roots also lead to yellowing.

4. Pet Urine Burns

Dog urine contains high nitrogen levels, creating burn patches in the grass.

2. How to Fix Yellow Grass

✅ Apply a nitrogen-rich fertiliser to replenish nutrients
✅ Adjust watering habits to keep soil moist but not soggy
✅ Aerate compacted areas for better root health
✅ Use pet-friendly lawn treatments to neutralise urine spots

Restore Your Lawn with Professional Care

Need help diagnosing yellowing grass? A lawn care specialist can provide a custom lawn treatment plan for a greener, healthier garden.