Orchid Leaves Turning Yellow (10 Common Reasons)

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High or Low Temperature

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Humidity Levels

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Over-Watering

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Under-Watering

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Seasonal Changes

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Fungal and Bacterial Infections

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Orchid Leaves Turning Yellow (10 Common Reasons)

High or Low Temperature

Orchids are even more sensitive to the ambient air temperature than most tropical house plants and flowers. Even a few hours of temperatures that are too high or too low can result in yellowing leaves.

Humidity Levels

Orchids like some humidity, but they’re also prone to growing bacteria and mold on their leaves when there’s too much moisture in the air.

Over-Watering

Adding a little too much water to your orchid’s pot can smother the roots and cause immediate yellowing of leaves within a few hours to days.

Under-Watering

If you’re too afraid to water your orchid when needed, you’ll notice leaves getting soft and yellowing (we generally recommend not watering orchids with ice cubes).

Seasonal Changes

Since there are dozens of common causes for an orchid to yellow, seasonal changes are hard on the plants.

Fungal and Bacterial Infections

Changes in temperature and humidity levels leave the orchid open to attack from fungus and bacteria. High temperatures and high humidity levels are particularly damaging when fungal spores are present.

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