Why does your Lilium regale Regale have sudden leaf drop? Diagnose the cause and fix it with our step-by-step guide.
This fungal pathogen thrives in humid conditions and causes rapid necrosis of foliage, often leading to the plant shedding leaves prematurely. It typically starts as brown spots that quickly expand and can cause entire leaves to wilt and drop.
Excessive moisture in the bulb area causes the roots to decay, cutting off the nutrient supply to the foliage. When roots fail, the lily cannot support its large leaves, resulting in sudden senescence and leaf drop.
Regal Lilies are sensitive to extreme heat or sudden cold snaps, which can trigger a survival mechanism where the plant sheds foliage. Rapid changes in humidity or sudden drought after a wet period can also cause this shock.
A sudden lack of available nitrogen, especially if the soil has been depleted by heavy spring growth, can cause the plant to shed older leaves to conserve resources. This is common in lilies grown in heavily leached soils.
Your plant might also be experiencing one of these issues:
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