Why does your Pellaea rotundifolia have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyButton ferns are native to shaded, moist environments and require high ambient humidity. When the air is too dry, the fronds begin to lose moisture rapidly, leading to chlorosis (yellowing) and eventual crisping of the leaf edges.
While Button Ferns like moist soil, they cannot tolerate sitting in stagnant water. Excessive moisture displaces oxygen in the potting medium, leading to root rot which prevents the plant from transporting nutrients, manifesting as yellowing foliage.
Pellaea rotundifolia thrives on stability. Allowing the soil to dry out completely before watering again causes moisture stress, which triggers the plant to sacrifice older fronds by turning them yellow.
If the plant has been in the same potting soil for an extended period, it may have depleted nitrogen levels. Nitrogen deficiency typically presents as a uniform yellowing of older, lower fronds first.
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