Why does your Allium cepa Medusa F1 have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Onions are heavy feeders that require significant nitrogen for bulb and leaf development. Yellowing typically begins with the older, outer leaves as the plant remobilizes nitrogen to newer growth.
Excessive moisture in the soil suffocates onion roots, leading to reduced oxygen uptake. This stress manifests as yellowing foliage and can eventually lead to bulb rot in Allium species.
This fungal pathogen causes yellowing of the leaves, often accompanied by water-soaked lesions or purplish spots. It thrives in cool, humid conditions common during the early growth stages of Medusa F1.
Extreme-high temperatures can cause the leaf tips to turn yellow and then brown/necrotic. This is often a physiological response to prevent excessive transpiration in the onion's vascular system.
Your plant might also be experiencing one of these issues:
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