Why does your White Cabbage Autumn Queen F1 have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
In Brassica species like Autumn Queen, a lack of potassium prevents proper osmotic regulation in leaf margins. This manifests as characteristic necrotic brown edges spreading inward toward the leaf.
Excessive fertilizer salts or high sodium levels in the soil medium cause osmotic stress, drawing moisture out of the leaf tips. This is common in cabbage when nitrogen-heavy fertilizers are applied too aggressively.
Cabbages require consistent moisture to maintain cell turgor; rapid fluctuations between bone-dry and saturated soil cause the delicate leaf margins to desiccate and turn brown.
Certain strains of Xanthomonas can cause localized tissue death. While typically presenting as water-soaked spots, in advanced stages or specific microclimates, these lesions can coalesce along the leaf margins.
Your plant might also be experiencing one of these issues:
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