Discard infected plants. Graying Nephrolepsis , Boston fern Leaves have a gray color and plants have few runners. Drought Maintain even soil moisture at all times. Examine roots for nematode and root rot symptoms. Foliar Nematode Asplenium Small dark green spots form at the base of fronds.
Spots turn brown to black as they enlarge.
Aphelenchoides fragariae Discard infected plants. Avoid wetting the fronds when watering. Frond Lobing Asplenium Fronds have many lobes and indentations. Frond tips may be crinkled or dead. Over fertilization Reduce the amount of fertilizer being used and leach the pots.