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Leaf Spot in Tomato

How to identify and treat leaf spot in Tomato.

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Tomato care requirements

water
Deeply and regularly; 2–5cm per week. Consistent moisture prevents blossom end rot.
soil
Rich, well-draining soil with good organic matter. pH 6.0–6.8.
light
Full sun — 8+ hours daily.
symptoms

Symptoms to look for in Tomato

Small, circular brown to black spots on leaves, often with a yellow halo, starting on lower leaves and spreading upward in humid conditions.

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Common causes in Tomato

Caused by fungal or bacterial pathogens that thrive on wet foliage — overhead watering, overcrowded planting, and poor airflow all increase the risk on tomatoes specifically since their dense foliage traps humidity.

healing

How to treat leaf spot in Tomato

Remove and destroy affected leaves, improve airflow through pruning and staking, and apply a fungicide or bactericide labelled for tomato leaf spot if it's spreading.

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Preventing leaf spot in Tomato

Water at the soil level rather than overhead, stake or cage plants for airflow, and mulch to prevent soil splashing onto lower leaves.

Leaf Spot in Tomato — Symptoms & Treatment | GreenScout