Can I save a yellow leaf?

No, yellow leaves will not turn green again. It is best to remove them so the plant can focus energy on new growth.

Is yellowing a sign of too much light?

Yes, direct sun can bleach the leaves and cause them to yellow. Move your fern to a spot with bright indirect light.

Why are my Japanese climbing fern's leaves turning yellow?

Check these first

Check if the soil is waterlogged or muddy.
Inspect the drainage holes to ensure they are not blocked.
Look for signs of pests on the underside of the leaves.

Likely causes

Overwatering
Most likely
How to tell: The leaves turn yellow and feel soft or mushy. The soil stays soggy for days after watering.
What to do: Allow the excess water to drain completely after each watering. Ensure your pot has drainage holes and use a well draining potting mix.
Nutrient Deficiency
Possible
How to tell: Older leaves turn yellow while the plant looks generally pale. This happens if the plant has been in the same soil for a long time.
What to do: Apply a balanced liquid fertilizer diluted to half strength once a month during the growing season. Do not fertilize if the plant is struggling.

When to worry

If the yellowing affects the entire plant quickly, it could be root rot. A few yellowing leaves at the base of an older plant is normal.

Stopping it coming back

Only water when the soil surface feels slightly dry and ensure the pot drains well.

Not sure which one it is? Photograph your climbing fern.

This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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Questions people ask

Can I save a yellow leaf?: No, yellow leaves will not turn green again. It is best to remove them so the plant can focus energy on new growth.
Is yellowing a sign of too much light?: Yes, direct sun can bleach the leaves and cause them to yellow. Move your fern to a spot with bright indirect light.