Rubber plant — Ficus elastica
The rubber plant looks indestructible but has one quiet weakness: it hates being moved. Relocate it from the shop window to your living room and expect 2-4 leaves to drop in the first fortnight. That is acclimation, not failure.
Quick care specs.
| Parameter | Value |
|---|---|
| Watering | Every 9 days (summer), 15 days (winter) |
| Light | Bright indirect; some morning direct sun is fine |
| Lux range | 1000–2500 |
| Humidity | 40-50% — average home air is acceptable |
| Temperature | 18-24°C; avoid swings above 5°C in either direction |
| Toxicity | Mildly toxic; milky sap irritates skin and mouth |
| Difficulty | medium |
Watering guide.
Ficus elastica stores water in its thick, rubbery leaves, which is why it forgives the occasional missed watering. In a 20 cm plastic pot with bright indirect light, 9 days between waterings is the RHS-aligned baseline. Let the top 5 cm dry before refilling. Winter drops to 12-15 days because cool soil holds moisture longer and growth pauses.
Over-watering shows up as brown spots ringed with yellow, often on lower leaves first. Under-watering causes the whole canopy to sag and leaf edges to curl inward. If you want an exact interval for your pot and environment, the watering schedule generator factors in pot size, material, and light.
Light requirements.
Rubber plants grow fastest at 1500-2500 lux — right next to an east window, or 1 m back from a south one behind a sheer curtain. Below 700 lux, growth slows dramatically and the burgundy cultivars (Burgundy, Abidjan) fade to muted green. The variegated Tineke needs even more light, 1800+ lux, to keep its cream stripes.
Direct midsummer afternoon sun scorches large leaves in a day; watch for pale grey-brown patches on the side facing the window. Rotate the pot a quarter turn weekly for even growth. Verify your spot with the light requirement matcher.
Common problems.
| Symptom | Cause | Fix |
|---|---|---|
| Leaves dropping after you move it | Acclimation stress | Leave it alone; new growth resumes in 3-6 weeks |
| Leaves drop near a radiator or draft | Temperature swing | Relocate to steady 18-24°C spot away from vents |
| Lower leaves yellow and drop | Over-watering or heavy soil | Dry out 2 weeks; repot in a chunkier mix with perlite |
| Leaf edges brown and crispy | Low humidity or salt buildup | Rinse leaves; flush soil; run a humidifier in winter |
| Sticky residue on leaves or floor | Scale insects | Wipe with 70% isopropyl alcohol on a cotton pad; repeat weekly |
| Dull, dusty leaves | Dust blocking photosynthesis | Wipe monthly with a damp cloth or rinse in a lukewarm shower |
Propagation.
Air layering works best for rubber plants. Score a healthy stem just below a node, wrap the cut with moist sphagnum moss, and enclose in plastic film. Keep the moss damp. Roots emerge into the moss in 4-6 weeks; cut below the root mass and pot up. Tip cuttings also work but take longer (6-8 weeks) and have a lower success rate.
Wear gloves — the milky latex sap drips freely from any cut and irritates skin. Dab cuts with cinnamon powder to stop the bleeding and deter fungal infection.
FAQ.
Why did my rubber plant drop all its leaves at once?
Almost always temperature shock — sitting near a cold window in winter, or a sudden move from a warm greenhouse to a cool room. If the stem is still green and firm, leaves will regrow in 6-10 weeks.
Is the sap dangerous to pets?
The latex causes mouth irritation and GI upset if chewed, per AVMA. It is not usually life-threatening but enough to warrant keeping it out of reach of puppies and curious cats.
Can I cut the top off to make it branch?
Yes. Prune the main stem 10-15 cm above a leaf node in spring. The plant will push 1-3 new branches from the node below the cut within 4-6 weeks. Use the top cutting to air-layer a second plant.
Why do new leaves come out red and then turn green?
The protective sheath around each new leaf is red or pink. Once the leaf unfurls and the sheath drops, the mature colour emerges. Normal for most cultivars.