Yellowing Leaves on rubber plant
What's Happening
Yellow leaves in Ficus elastica have two primary causes requiring opposite treatments. NUTRIENT DEFICIENCY: Pale yellowing of older leaves, often with green veins remaining (interveinal chlorosis), indicates nitrogen or iron deficiency from depleted soil or pH imbalance. ROOT ROT: Uniform yellowing often accompanied by leaf drop, soft stems, and wet soil indicates compromised roots unable to uptake nutrients. Misdiagnosis leads to fertilizing a rotting plant—adding salt stress to already damaged roots.
How to Fix It
- 1
Inspect soil first: Wet/moist soil with yellowing = root rot; Dry soil = nutrient deficiency
- 2
For root rot: Stop watering, unpot, trim affected roots, repot in fresh dry mix
- 3
For nutrient deficiency: Apply balanced liquid fertilizer at 1/4 strength every 2-3 weeks during growing season
- 4
Test soil pH: Ficus elastica prefers 6.0-7.0; adjust with sulfur if too alkaline
- 5
If uncertain: Address potential rot first (safer) before adding fertilizer
How to Prevent It
Repot every 12-18 months with fresh nutrient-rich mix. Use balanced slow-release fertilizer in spring. Maintain proper watering discipline to prevent root damage that mimics nutrient deficiency.