Why does your Allium cepa Tough Ball F1 have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Onions require consistent moisture to develop bulb size; prolonged dry periods cause the leaf tips to desiccate and turn brown. This is common in Allium species when transpiration exceeds water uptake.
Excessive nitrogen fertilizers or hard water minerals can accumulate in the leaf margins, causing tip burn in Allium cepa. This is particularly common in intensive vegetable production.
A lack of potassium can disrupt osmotic regulation in the onion leaves, leading to necrotic brown tips. This deficiency often manifests as marginal chlorosis before progressing to necrosis.
While less common than abiotic stress, certain fungal pathogens can cause necrotic lesions starting at the tips of Allium leaves. This is more likely in high-humidity environments with poor airflow.
Your plant might also be experiencing one of these issues:
English
Italiano
