Why does your Allium porrum Mako Sublim F1 have brown leaf tips? Diagnose the cause and fix it with our step-by-step guide.
Leeks are sensitive to high levels of soluble salts in the soil or irrigation water. Excess salts accumulate at the leaf margins, causing oxidative stress that results in characteristic brown, scorched tips.
As a monocot with long, narrow leaves, Allium porrum loses moisture rapidly through transpiration. When soil moisture is insufficient to meet the demand, the furthest extremities (the tips) are the first to desiccate.
A lack of potassium hinders the plant's ability to regulate stomatal conductance and water use. This deficiency typically manifests as chlorosis followed by necrosis at the leaf tips and margins.
Pathogens such as *Peronospora destructor* can cause necrotic lesions that often start at the tips or edges of the leaves, especially in cool, damp conditions typical for leek cultivation.
Your plant might also be experiencing one of these issues:
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