Tomatoes: problems & diagnosis
Solanum lycopersicum
Tomatoes are expressive plants — they telegraph stress through their leaves and fruit faster than almost anything else in the garden. Most tomato 'diseases' people panic about are actually water, heat or feeding problems that are easy to reverse once you read them correctly.
14 tomato diagnosis guides
Showing 1–12 of 14 guides
Aphids on Tomato Plants: UK Identification and Control
Sticky leaves, distorted shoot tips or clusters of insects on your tomatoes? Identify the aphid species and choose the right UK control — from ladybirds to biological controls.
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Blossom End Rot on Tomatoes: Causes and UK Fixes
Blossom end rot on tomatoes is caused by inconsistent watering, not calcium-poor soil. Diagnose and fix it with this UK guide.
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Leggy Tomato Seedlings: Causes, Fixes and UK Timing
Leggy tomato seedlings are almost always caused by too little light. This UK guide explains the real causes and practical fixes.
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Overwatered Tomato Plant: Signs, Causes and How to Recover It
Overwatered tomatoes look like underwatered ones — drooping leaves, yellowing, soft stems. Learn to tell them apart and recover the plant.
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Tomato Black Spots: Causes on Leaves and Fruit Diagnosed
Tomato black spots usually mean Septoria leaf spot, early blight, blossom end rot or bacterial speck. UK diagnosis table with specific checks and fixes.
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Tomato Blight: UK Symptoms, Causes and What to Do
Brown patches spreading fast, collapsing foliage or rotting fruit? Identify late blight and other tomato diseases — and learn what UK gardeners can actually do about it.
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Tomato Leaves Curling Down: Causes and Fixes
Tomato leaves curling down usually mean root stress, excess nitrogen, cold nights or disease. Use this table to diagnose and fix it.
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Tomato Leaves Curling Upwards: What It Means
Tomato leaves curling upwards? Use this quick table to separate heat, watering stress, pests, herbicide drift and virus symptoms.
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Tomato Plant Not Flowering: UK Causes and Fixes
Tomato plant not flowering or not setting fruit in the UK? Temperature extremes, excess nitrogen and poor pollination are the main causes. Diagnose here.
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Tomato Plant Problems UK: Diagnosis Guide for Leaves and Fruit
Diagnose UK tomato problems — blight, leaf mould, blossom end rot, magnesium deficiency, leaf curl and splitting — with this RHS-backed guide.
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Tomato Plant White Spots on Leaves: Causes and UK Fixes
White spots on tomato leaves can be powdery mildew, leaf mould, septoria, sun scorch or edema. This UK guide helps you tell them apart.
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Wilting Tomato Plant: UK Causes, Diagnosis and Fixes
Tomato plant wilting in the UK? Diagnose underwatering, root rot, transplant shock, Fusarium wilt, bacterial wilt and heat stress with this step-by-step guide.
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