Troubleshooting
Tongue Leaf Plant problems — and how to fix them
Tongue Leaf Plant (Glottiphyllum longum) 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.
Excessive leaf elongation
The most common complaint. Leaves become unusually long and floppy due to overwatering, overfeeding, or insufficient light. This species naturally has long leaves, but they should be firm. Reduce water and feed, and increase light.
Root rot
Caused by consistently moist soil or waterlogged pots. Leaves turn soft and yellowing starts at the base. Remove the plant, trim rotted roots, dust with sulphur powder, and repot into fresh dry gritty mix.
Mealybugs
Waxy white insects shelter between the thick leaf pairs. Treat promptly with isopropyl alcohol on a cotton bud and follow up with a neem oil drench of the soil to catch root mealybugs.
Prevent tongue leaf plant problems before they start
Most tongue leaf plant issues are care-mismatch, not bad luck. Dial in the basics:
Looking for tongue leaf plant in general rather than its problems? Read the full tongue leaf plant care guide — light, water, soil and feeding.
Tongue Leaf Plant problems — FAQ
Why is my tongue leaf plant excessive leaf elongation?
The most common complaint. Leaves become unusually long and floppy due to overwatering, overfeeding, or insufficient light. This species naturally has long leaves, but they should be firm. Reduce water and feed, and increase light.
Why is my tongue leaf plant root rot?
Caused by consistently moist soil or waterlogged pots. Leaves turn soft and yellowing starts at the base. Remove the plant, trim rotted roots, dust with sulphur powder, and repot into fresh dry gritty mix.
Why is my tongue leaf plant mealybugs?
Waxy white insects shelter between the thick leaf pairs. Treat promptly with isopropyl alcohol on a cotton bud and follow up with a neem oil drench of the soil to catch root mealybugs.