Roses: problems & diagnosis
Rosa
Roses attract a predictable shortlist of problems — black spot, powdery mildew, rust, aphids and sawfly. The good news is that the symptoms are distinctive, so once you know what each looks like, diagnosis is quick and the fixes are well established.
11 rose diagnosis guides
Aphids on Roses: UK Identification, Treatment and Control
Aphids on roses in the UK — how to identify rose aphids (greenfly), when to act and how to control them without harming natural predators.
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Powdery Mildew on Roses: UK Causes, Treatment and Prevention
White powder on rose leaves is powdery mildew — triggered by dry roots in humid air. This UK guide explains treatment and resistant varieties.
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Rose Brown Leaves: UK Causes, Diagnosis and Fixes
Rose leaves turning brown in the UK? Most likely causes are black spot, rose rust, drought scorch, dieback or powdery mildew. Diagnosis guide with real fixes.
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Rose Holes in Leaves: Sawfly, Leaf-Cutter Bees and Caterpillars
Neat semicircles, ragged holes or skeletonised patches on rose leaves? Identify sawfly, leaf-cutter bees and caterpillars — and find the right UK response.
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Rose Leaves Yellow With Black Spots: Black Spot or Something Else?
Rose leaves yellow with black spots usually mean black spot. Use this quick table to confirm it, rule out rust and pests, and fix it.
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Rose Leaves Turning Yellow at the Bottom: Normal or a Problem?
Lower rose leaves turning yellow can be normal ageing, shade, water stress, feeding issues, or early black spot. Use this table to check.
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Rose Not Flowering: UK Causes, Diagnosis and Fixes
Rose producing leaves but no flowers in the UK? Wrong pruning, too much nitrogen, not enough sun and rose blindness are the main culprits. Diagnose here.
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Rose Problems UK: Diagnosis Guide for Leaves, Stems and Flowers
Diagnose common UK rose problems — black spot, rust, aphids, powdery mildew, dieback and replant disease — with this RHS-backed identification table.
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Spider Mites on Roses: UK Identification and Control
Spider mites on roses in the UK: identify fine webbing, pale leaf speckling, and mottling; learn biological and non-chemical control that actually works.
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Whitefly on Roses: UK Identification, Control and Prevention
Whitefly on roses in the UK — identify glasshouse whitefly, treat with biological control or fatty-acid spray, and keep roses healthy to resist reinfestation.
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Yellow Leaves on Rose Bushes: Causes and Fixes
Yellow leaves on rose bushes? Use this quick diagnosis table to tell black spot, water stress, rust and nutrient problems apart.
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