From a plant's perspective, water balance is crucial for survival. Rubber fig (Ficus elastica) leaves may drop if the roots are either drowning or thirsty. Overwatering suffocates the roots, preventing oxygen uptake and leading to root rot. Conversely, underwatering causes the plant to conserve resources by shedding leaves. The soil should be moist but not soggy—allow the top inch to dry out before watering again.
Rubber figs thrive in bright, indirect light. If placed in low light, the plant struggles to photosynthesize, weakening its structure and causing leaf drop. On the other hand, direct sunlight can scorch leaves, forcing the plant to shed damaged foliage. Adjust the plant's location to mimic its natural habitat—filtered sunlight akin to a forest canopy.
Rubber figs prefer stable temperatures between 60–75°F (15–24°C). Sudden drafts, cold snaps, or heat waves shock the plant, triggering leaf loss. Avoid placing it near air vents, windows, or exterior doors. Think like a tropical plant—consistency is key to keeping leaves intact.
Native to humid environments, rubber figs suffer in dry indoor air. Low humidity causes leaves to lose moisture faster than roots can absorb, leading to drooping and dropping. Grouping plants together, using a humidifier, or misting occasionally can recreate the moist air they crave.
Like all plants, rubber figs need balanced nutrients. A lack of nitrogen, magnesium, or iron can cause yellowing and leaf drop. Conversely, excess fertilizer salts burn roots, harming leaf health. Use a diluted, balanced fertilizer every 4–6 weeks during growing seasons, and flush the soil occasionally to prevent salt buildup.
Insects like spider mites, mealybugs, or scale sap the plant's energy by feeding on its juices. As a defense mechanism, the rubber fig may shed affected leaves. Regularly inspect leaves (especially undersides) and treat infestations promptly with insecticidal soap or neem oil.
If roots outgrow their pot, they become cramped and inefficient at absorbing water/nutrients. The plant responds by dropping leaves to reduce demand. Check for roots circling the pot's bottom or poking through drainage holes. Repot every 2–3 years into a slightly larger container with fresh soil.
Older leaves naturally yellow and fall over time as the plant directs energy to new growth. If only the lower leaves are dropping sporadically, this is likely normal senescence. However, sudden or widespread leaf loss indicates an underlying issue.
Rubber figs are sensitive to relocation. Moving pots, repotting, or even rotating the plant can cause temporary stress. Leaves may drop as the plant adjusts. Minimize changes and give it time to acclimate—patience helps it rebound.
