Spider Mites on Fiddle Leaf Fig — Finding Them and Eliminating Them
Fiddle Leaf Fig (Ficus lyrata)
Symptoms
- stippled or speckled leaves
- fine webbing between leaves or stems
- dusty-looking leaf undersides
- tiny moving dots on leaves
- yellowing with dry speckles
Causes
Low humidity and warm conditions
The two-spotted spider mite (Tetranychus urticae) breeds explosively once winter heating drops indoor humidity and raises air temperature — exactly the combination central heating produces for months at a stretch. FLF's large, flat leaf surfaces give a colony plenty of room to spread before the stippling becomes obvious, and populations can double within a week under these conditions.
Introduction on new plants
Spider mites are frequently imported on newly purchased plants. Their small size (adults are barely visible to the naked eye) makes them easy to miss during casual inspection.
Dusty leaf surfaces
Dust on leaves creates physical cover and reduces the plant's ability to detect mite presence through natural defensive mechanisms. Fiddle Leaf Figs' large leaves accumulate dust readily in indoor environments.
How to Fix It
- 1
To confirm before treating, tap a leaf sharply over a sheet of white paper — any tiny specks that land and start crawling are mites, not just dust. Fiddle-leaf's large leaf undersides give you plenty of surface area to inspect closely with a loupe for the fine webbing that collects along the main veins first.
- 2
Move the plant to a shower stall or large sink where you can rinse every leaf — fiddle-leaf's broad, rigid leaves are sturdy enough to wipe individually with a damp cloth if a hose stream doesn't reach every surface, and a mite knocked off simply doesn't survive the fall.
- 3
Coat every leaf surface, especially the undersides where mites cluster, with either an insecticidal soap solution or a neem mix diluted per the product label. Spray in the morning so the large leaves have the whole day to dry before night humidity rises.
- 4
Repeat every 5–7 days for 4 weeks. Spider mite eggs are resistant to contact treatments; the treatment schedule must span multiple egg-hatching cycles to achieve control.
- 5
Increase humidity around the plant during and after treatment. Humidity above 50% dramatically slows mite reproduction. A humidifier, pebble tray with water, or grouping with other plants all help.
Prevention
- Wipe Fiddle Leaf Fig leaves with a damp cloth monthly to remove dust and disrupt any early mite colonies.
- Maintain humidity above 40% around the plant, especially in winter when central heating dries indoor air.
- Inspect undersides of leaves during monthly maintenance sessions — the undersides are where mites feed and lay eggs.
- Quarantine all new plants for 2–4 weeks before placing them near your FLF.
Quick Summary
| Plant | Fiddle Leaf Fig (Ficus lyrata) |
|---|---|
| Category | Pests |
| Likely causes | Low humidity and warm conditions, Introduction on new plants, Dusty leaf surfaces |
| Fix steps | 5 steps — see above |