Plant care guide
Overwatered Anthurium: Signs, Root Checks and Rescue
Updated
Is my Anthurium overwatered?
An overwatered anthurium usually shows yellowing older leaves, wilting or drooping while the mix is still wet, and roots that are brown, soft or slipping apart. The cause is mix that stays wet too long, which starves roots of oxygen and favors root rot.
What to do first
Stop watering, empty any saucer, and check the roots. If most roots are firm, let the mix dry back; if some are soft and dark, cut them off and repot into fresh, open mix in a pot only slightly larger than the root ball.
An overwatered anthurium is short of oxygen at the roots, not short of water. When mix stays wet, water fills the air spaces, roots stop growing and then die. Virginia Cooperative Extension’s container watering guide describes this chain, and it is why a drooping plant in wet mix gets worse with more water.
Anthuriums are epiphytes in the wild, growing on trees rather than in dense soil. The RHS anthurium growing guide warns that compost kept too wet, from watering too often or too heavily, causes the roots to rot. NC State Extension says the same for Anthurium andraeanum: overwatering can cause root rot, and yellowing leaves can follow overwatering or poor drainage.
Signs that point to too much water
Look for several of these together:
- Older leaves turning yellow. UF/IFAS Extension’s anthurium problem table links chlorotic older leaves with root damage to excess water.
- Wilting or drooping while the mix is still damp.
- Soft, mushy leaf stalks or stems near the mix.
- A sour or rotten smell from the pot.
- Fungus gnats around the surface.
- A heavy pot, a saucer holding water, or no drainage hole.
The Virginia guide lists wilting, yellowing on new and old leaves, mushy tissue, leaf drop, stunted growth, rotten-smelling soil and fungus gnats as overwatering symptoms. It also warns that underwatered plants wilt first too. The mix and roots tell the two apart.
Check the roots
Slide the plant out of its pot. Support the base and do not pull on the leaves.
- Working roots feel firm and hold together when handled.
- Rotted roots are brown to black and soft. University of Maryland Extension’s page on root rots of indoor plants notes that with Pythium root rot, the outer layer of a root pulls away and leaves a fine thread behind.
UF/IFAS Extension’s guide to anthurium diseases describes Pythium and Phytophthora on anthurium as root sloughing, with plants wilting even when the mix holds enough water. These water molds are favored by saturated mix.
Wear gloves while handling the plant. The RHS notes that anthurium sap can irritate skin.
What to do: roots mostly firm
- Stop watering and empty the saucer or outer pot.
- Move the plant somewhere warm with bright, indirect light so the mix dries faster. Keep it out of direct sun.
- Check the mix with a finger every few days. Water again only when the top 2.5–5 cm (1–2 in) is dry.
- Remove leaves that have turned fully yellow. UF/IFAS lists removing yellow leaves and watering less often as the fix for excess-water damage.
- Hold off on fertilizer until new growth appears.
What to do: some roots soft and dark
- Rinse or tease away the old mix so you can see every root.
- Cut off soft, dark roots with clean, sharp scissors. Clemson Extension’s houseplant diseases and disorders factsheet advises that if only a few roots are infected, cut them out and repot in sterile soil.
- Repot into fresh, open mix. The RHS suggests two parts ericaceous peat-free compost, one part perlite and one part orchid bark.
- Use a clean pot with a drainage hole, no more than one size larger than the remaining roots. The RHS warns that overpotting keeps compost wet too long.
- Water once to settle the mix, then let it dry back before watering again.
If most roots are gone, Maryland Extension advises discarding severely infected plants and taking cuttings only from healthy tissue. Clemson adds that if most roots are dark, soft and dead, discarding the plant is the better choice. The RHS notes that a piece of stem with leaves and aerial roots can root when stood in water in a warm, bright place.
Do not reuse the old mix. Scrub a pot before reusing it.
Prevent it next time
- Water by checking the mix, not by the calendar. NC State advises watering when the top 2.5 cm (1 in) feels dry.
- Expect slower drying in autumn and winter. The Virginia guide advises watching plants closely in those months to avoid overwatering.
- Do not leave the pot standing in water for more than 60 minutes after watering.
- Keep the plant warm. The RHS gives 18–30 °C (65–86 °F). The Virginia guide notes that a plant kept cool, such as beside a winter window, uses less water, so its mix stays wet longer.
The anthurium hub collects our other anthurium pages. For a general walk-through, see our guides to telling overwatering from underwatering and to houseplant root rot.
Related guides
Other anthurium problems we cover: watering frequency, spider mites treatment, common problems, brown spots, not blooming.
References
- UF/IFAS Extension: Cultural Guidelines for Commercial Production of Interiorscape Anthurium (EP159)
- UF/IFAS Extension: Anthurium Diseases, Identification and Control in Commercial Greenhouse Operations (PP292)
- Virginia Cooperative Extension: Properly Watering Container Houseplants (SPES-804)
- University of Maryland Extension: Root Rots of Indoor Plants
- Clemson Cooperative Extension HGIC: Houseplant Diseases & Disorders (HGIC 2251)
- RHS: How to grow anthuriums
- NC State Extension Gardener Plant Toolbox: Anthurium andraeanum
How this guide was put together: UF/IFAS Extension, Virginia Cooperative Extension, University of Maryland Extension, Clemson Extension, RHS, and NC State Extension guidance.