Why does your Adiantum aleuticum have yellow leaves? Diagnose the cause and fix it with our step-by-step guide.
Adiantum aleuticum is highly sensitive to dry air; when humidity drops, the delicate fronds lose moisture rapidly, causing the leaflets to turn yellow and eventually crisp.
While these ferns love moisture, heavy, waterlogged soil deprives the rhizomes of oxygen, leading to chlorosis (yellowing) as root rot begins to develop.
In containers, a lack of nitrogen prevents the production of chlorophyll, which manifests as a uniform yellowing across older fronds first.
Adiantum species are sensitive to salts and chlorine found in municipal water; buildup in the growing medium can cause leaf discoloration.
Your plant might also be experiencing one of these issues: