Anthurium andraeanum Amis Sudden Leaf Drop - Causes & Fixes

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Root Rot due to Overwatering

Anthuriums are sensitive to stagnant water; excessive moisture leads to Pythium or Phytophthora infection, causing the roots to decay and the plant to shed leaves as it loses the ability to transport water.

Very Common

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How to confirm: Gently lift the plant from its pot to check if the roots are brown, slimy, or have a foul odor.

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1 Immediately remove the plant from its current pot and inspect the roots; trim away any mushy, black, or foul-smelling roots using sterilized shears.

2 Repot the Anthurium in a fresh, highly aerated medium to prevent future stagnation, such as a mix containing Legigo Organic Leca Clay Pebbles or Perlite for improved drainage.

Legigo 4LB Leca Clay Pebbles

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3 Transition to a more controlled watering routine by using a soil moisture meter to ensure the top inch of soil is dry before adding more water.

GROWIT Soil Moisture Meter - Blue

Water Meters

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Temperature Shock or Cold Drafts

Anthurium andraeanum is a tropical species that thrives in consistent warmth; sudden exposure to temperatures below 60°F (15°C) or cold drafts from windows can trigger an immediate stress response resulting in leaf abscission.

Very Common

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How to confirm: Check if the plant is located near an air conditioning vent, drafty window, or a door that opens frequently.

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1 Relocate your Anthurium to a warm, stable environment away from drafty windows, air conditioning vents, or doors to prevent further temperature fluctuations.

2 Maintain a consistent temperature between 65°F and 80°F to help the plant recover from the stress response.

3 Monitor the soil moisture closely during this recovery period, as temperature changes can alter evaporation rates.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Low Humidity Stress

This species requires high humidity (above 60%); when ambient air becomes too dry, the plant may drop older leaves to conserve moisture for the remaining foliage and spadix.

Common

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How to confirm: Monitor the edges of the remaining leaves for browning or crispiness alongside the leaf drop.

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1 Increase ambient humidity around the plant by using a pebble tray or a dedicated humidifier to maintain levels above 60%.

Bleuhome 6-Pack 6in Plant Saucers Black

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2 Mist the foliage regularly with a fine spray to provide immediate moisture to the leaves.

Flora Premium Plant Mister

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3 Monitor soil moisture levels to ensure the plant is not also experiencing drought stress, which can exacerbate leaf drop.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Fungal Leaf Spot (Anthracnose)

Pathogens like Colletotrichum can cause necrotic lesions on the leaves; if the infection becomes systemic or severe, the plant may drop affected leaves to prevent further spread.

Common

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How to confirm: Inspect the remaining leaves for small, dark, sunken spots that may be spreading toward the stems.

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1 Remove and discard all heavily infected or necrotic leaves immediately to prevent the fungal spores from spreading to healthy foliage.

2 Apply an organic fungicide to the remaining healthy leaves to suppress the spread of the Colletotrichum pathogen.