Plant care guide
Fiddle-Leaf Fig Root Rot: Signs, Root Check and Rescue
Updated
Why does my Fiddle leaf fig have root rot?
Fiddle-leaf fig root rot comes from mix that stays wet, which lets water molds such as Pythium and Phytophthora attack the roots. The plant drops leaves, often still green, or yellows and wilts while the mix is damp. Rotted roots are brown to black and soft. Firm roots can be kept; the rest has to be cut away.
What to do first
Stop watering and unpot the plant. Remove the wet mix, cut away soft, dark roots with clean shears, and repot the firm roots in fresh, well-drained mix in a clean pot with drainage holes. Water once, then wait until the top 2 cm (1 in) is dry. If the stem base is soft, root stem cuttings instead.
A fiddle-leaf fig that keeps dropping leaves while its mix stays damp may have lost part of its root system. NC State Extension’s fiddle-leaf fig profile calls the plant sensitive to overwatering. Root rot is where that ends if nothing changes.
You cannot confirm rot from the leaves. You have to look at the roots.
Signs that send you to the roots
- Green leaves dropping while the mix is wet. UF/IFAS Extension’s Ficus production guide (EP136) links green leaf drop with root death when the mix is excessively wet.
- Yellowing and wilting in damp mix. University of Maryland Extension’s root rot page lists yellowing, browning, dieback and wilting.
- Mix that smells sour or stays wet for days. Virginia Cooperative Extension’s watering guide lists foul-smelling soil and fungus gnats among overwatering signs.
- Dark patches on leaves. UF’s Ficus disease guide notes that with Pythium and Phytophthora root rot, foliage may show black to brown lesions under wet conditions.
Tiny red dots on new leaves are a different, milder problem. See our fiddle-leaf fig edema guide. For leaf loss with dry mix, a recent move or low light, use our dropping leaves guide.
Read the roots
Ease the plant out of its pot and loosen the outer mix.
| What you see | What it means |
|---|---|
| Firm, light-coloured roots | Healthy, as UW–Madison describes |
| Brown to black, soft roots whose outer layer slides off | Pythium rot (Maryland) |
| Root tips dark brown, then soft and mushy | Phytophthora rot (Maryland) |
| Coarse reddish-brown threads like spider web | Rhizoctonia (Maryland) |
| Soft, discoloured stem at soil level | Rot has reached the stem |
UF says Pythium and Phytophthora need water to complete their life cycles, which is why saturated mix sets them off. UW–Madison Extension’s root rot article adds that these organisms prefer wet soil and some survive in old mix and plant debris.
Rescue steps
- Remove the wet mix from the root ball. UW–Madison advises never reusing mix from an infected plant.
- Cut out soft, dark roots with clean, sharp scissors back to firm tissue. Maryland’s repotting guide says to remove dead, brown roots. NC State recommends gloves, because the sap can irritate skin.
- Clean tools and pot. UW–Madison suggests a bleach or alcohol solution. Maryland advises clean or new pots.
- Repot in fresh, well-drained mix. NC State lists moist, well-drained soil. Maryland warns that bagged “potting soil” is often too dense. Use a pot with drainage holes and no rock layer, as UW–Madison advises.
- Pick a pot sized to the remaining roots, not to the old pot.
- Water once, then let it dry. Maryland says to water thoroughly after repotting, then wait until the top dries. The RHS ornamental figs guide suggests watering figs once the top 2 cm (1 in) is dry.
- Keep it warm and in one bright spot. NC State asks for temperatures above 13 °C (55 °F) and bright, indirect light. For newly placed figs, UF advises no moving, pruning or feeding for about four weeks, because they do not need additional stresses. A freshly trimmed plant is in the same position.
Clemson Extension’s disorders factsheet says that if only a few roots are infected, remove them and repot in sterile soil. UW–Madison does not recommend chemical fungicides for houseplants. UF lists fungicides for Ficus root rot, but for commercial nurseries.
When the stem base is soft
Maryland advises discarding severely infected plants and taking stem cuttings only from healthy tissue. NC State gives stem cuttings as the recommended way to propagate fiddle-leaf fig. Cut well above any discoloured wood.
Stop it coming back
- Check the mix before every watering. Virginia Cooperative Extension suggests feeling 2.5–7.5 cm (1–3 in) down, depending on pot size.
- Empty the saucer or cachepot. The same guide warns against leaving pots standing in water for more than 60 minutes.
- Water by need, not by the calendar. Maryland Extension’s watering page says plants should be watered when they need it, not on a schedule.
Judge recovery by a firm stem and a healthy new leaf at the tip. The fiddle-leaf fig care guide covers light and watering in full, and houseplant root rot explains the root check in more depth.
References
- NC State Extension Gardener Plant Toolbox: Ficus lyrata
- UF/IFAS Extension: Cultural Guidelines for Commercial Production of Interiorscape Ficus (EP136)
- UF/IFAS EDIS PP308: Ornamental Ficus Diseases: Identification and Control in Commercial Greenhouse Operations
- University of Maryland Extension: Root Rots of Indoor Plants
- UW–Madison Extension: Root Rots on Houseplants
- Clemson Cooperative Extension, HGIC 2251: Houseplant Diseases & Disorders
- University of Maryland Extension: Potting and Repotting Indoor Plants
- RHS: Ornamental figs
- Virginia Cooperative Extension: Properly Watering Container Houseplants (SPES-804)
- University of Maryland Extension: Watering Indoor Plants
How this guide was put together: NC State Extension, UF/IFAS Extension, University of Maryland Extension, UW–Madison Extension, Clemson Extension, RHS and Virginia Cooperative Extension guidance.