30-Year-Old Umbrella Tree: Yellow Leaves from Seasonal Relocation

A 30+ year old Schefflera (umbrella tree) summers outdoors and winters by a south window. New top leaves are fine, but older leaves yellow and streak. Owner suspects bugs.

Cause: Light Intensity Shock

Moving plants between vastly different light levels forces older leaves—adapted to the previous location—to discolor and die. New leaves adapt to the current light.

Solution

• Keep plants indoors year-round in a stable, bright location.
• If summer outdoors is essential, place in deep shade outside and bright sun inside to minimize contrast.

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