Diagnosing Leaf Drop in Indoor Plants

Tonya reports leaf drop on several indoor plants but doesn't specify which species. The expert, Tracy, explains that many factors cause leaf loss and provides a comprehensive checklist.

Common Causes of Leaf Drop

• Natural aging: Older, lower leaves yellow and fall.
• Seasonal shedding: Ficus may lose up to 20% of leaves in late summer/fall, regrowing in spring.
• Improper watering: Both over- and underwatering stress plants.
• Temperature drafts: Hot or cold air from vents, doors, or AC units.
• Low humidity: Many tropicals need 40-60% humidity.
• Over-fertilization: Especially on dormant or unhealthy plants.
• Pests/mites: Inspect regularly for early detection.

Watering Best Practices

Allow the top 1-2 inches of soil to dry between waterings, then water until a small amount drains out. Use distilled water to avoid fluoride, chlorine, and mineral buildup that damage sensitive plants.

Humidity Solutions

• Place plants on pebble trays half-filled with water (pot bottom above water line).
• Group plants to create a humid microclimate.
• Light misting helps.

Fertilizing Guidelines

Feed only healthy, actively growing plants. Use 1/3 the label rate of a balanced liquid fertilizer, diluted 1:2 with distilled water. Never fertilize dry soil or use fertilizer sticks (risk of root burn and chemical hot spots).

Identify the specific plants for tailored advice, but these universal practices resolve most leaf-drop issues.