Troubleshooting
Hound's Tongue Fern problems — and how to fix them
Hound's Tongue Fern (Microsorum pustulatum) 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.
Brown frond tips
Usually low humidity, inconsistent watering, or mineral build-up from hard tap water. Raise humidity, water more evenly, and use filtered or rainwater.
Yellowing or mushy fronds
Overwatering and poor drainage leading to root or rhizome rot. Let the top of the mix dry slightly between waterings, ensure the pot drains freely, and never bury the creeping rhizome.
Scale insects
Small brown bumps along fronds and the creeping rhizome that sap vigour and leave sticky residue. Remove manually with a cotton bud dipped in dilute insecticidal soap and treat with horticultural oil; repeat weekly until clear.
Prevent hound's tongue fern problems before they start
Most hound's tongue fern issues are care-mismatch, not bad luck. Dial in the basics:
Looking for hound's tongue fern in general rather than its problems? Read the full hound's tongue fern care guide — light, water, soil and feeding.
Hound's Tongue Fern problems — FAQ
Why is my hound's tongue fern brown frond tips?
Usually low humidity, inconsistent watering, or mineral build-up from hard tap water. Raise humidity, water more evenly, and use filtered or rainwater.
Why is my hound's tongue fern yellowing or mushy fronds?
Overwatering and poor drainage leading to root or rhizome rot. Let the top of the mix dry slightly between waterings, ensure the pot drains freely, and never bury the creeping rhizome.
Why is my hound's tongue fern scale insects?
Small brown bumps along fronds and the creeping rhizome that sap vigour and leave sticky residue. Remove manually with a cotton bud dipped in dilute insecticidal soap and treat with horticultural oil; repeat weekly until clear.