Troubleshooting
Hammock Fern problems — and how to fix them
Hammock Fern (Blechnum occidentale) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Frond tip browning
Most commonly caused by low humidity or inconsistent watering. Ensure humidity stays above 50%, water regularly so the medium never fully dries out, and use room-temperature rainwater or filtered water to avoid fluoride sensitivity.
Spider mites
Fine webbing on frond undersides with stippled, pale discolouration indicates spider mites, which thrive in dry, warm conditions. Increase humidity, rinse fronds under a gentle shower, and apply neem oil or insecticidal soap spray weekly.
Pale or bleached fronds
Caused by too much direct light or a sudden shift from low to high light. Move to a shadier position and allow the plant to readjust gradually. New fronds produced in correct lighting will emerge with normal colouration.
Prevent hammock fern problems before they start
Most hammock fern issues are care-mismatch, not bad luck. Dial in the basics:
Looking for hammock fern in general rather than its problems? Read the full hammock fern care guide — light, water, soil and feeding.
Hammock Fern problems — FAQ
Why is my hammock fern frond tip browning?
Most commonly caused by low humidity or inconsistent watering. Ensure humidity stays above 50%, water regularly so the medium never fully dries out, and use room-temperature rainwater or filtered water to avoid fluoride sensitivity.
Why is my hammock fern spider mites?
Fine webbing on frond undersides with stippled, pale discolouration indicates spider mites, which thrive in dry, warm conditions. Increase humidity, rinse fronds under a gentle shower, and apply neem oil or insecticidal soap spray weekly.
Why is my hammock fern pale or bleached fronds?
Caused by too much direct light or a sudden shift from low to high light. Move to a shadier position and allow the plant to readjust gradually. New fronds produced in correct lighting will emerge with normal colouration.