Yellowing Leaves on Indoor Aralia

A hotel lobby aralia (Polyscias or Fatsia species) shows persistent leaf yellowing. The owner asks for diagnosis.

Common causes of yellowing in indoor aralias:

• Low light: Aralias need bright, indirect light. In dim lobbies, lower leaves yellow and drop as the plant reallocates resources.
• Overwatering/poor drainage: Soggy soil causes root rot, leading to general chlorosis.
• Nutrient deficiency: Especially nitrogen or iron in soilless mixes that leach quickly.
• Spider mites: Common in dry indoor air; cause stippling and bronzing before yellowing.

Remedies: Move to a brighter location (near east/west window, or add grow lights). Check soil moisture—water only when top 1–2 inches are dry. Ensure pot has drainage holes. Apply a balanced, slow-release fertilizer (e.g., Osmocote) or organic spikes (like Jobe's) per label. Inspect leaf undersides for mites; treat with insecticidal soap if found. Increase humidity with a pebble tray.

If the plant has yellowed since installation, light is the primary suspect. Track changes over 4–6 weeks after adjustments.