Anthurium andraeanum Otazu Yellow Leaves - Causes & Fixes

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Overwatering and Root Rot

Anthuriums require well-draining media; excessive moisture leads to anaerobic conditions in the substrate, causing roots to decay and preventing water/nutrient transport, which manifests as yellowing foliage.

Very Common

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How to confirm: Stick your finger two inches into the soil to check if it remains soggy or feels swampy.

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

2 Repot the Anthurium in a highly aerated, well-draining medium by mixing a fresh potting substrate with perlite or orchid bark to prevent future anaerobic conditions.

3 Use a moisture meter to monitor the substrate, ensuring you only water when the top inch of soil is dry to avoid repeating the overwatering cycle.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Nutrient Deficiency (Nitrogen)

A lack of nitrogen prevents the production of chlorophyll in older leaves, causing them to turn uniformly yellow before eventually dropping.

Very Common

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How to confirm: Observe if the yellowing starts on the oldest, bottom-most leaves while new growth remains green.

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1 Apply a nitrogen-rich liquid fertilizer to boost chlorophyll production and green up the foliage.

FoxFarm Grow Big Liquid Plant Food 1 Quart

0.9 L • 1 pcs

$30

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2 Check the soil moisture levels with a meter to ensure the nitrogen is being effectively absorbed by the roots.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Prune any completely yellow or dead leaves to allow the plant to redirect energy to new, healthy growth.

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Improper Humidity and Low Ambient Moisture

Anthurium andraeanum is a tropical species that requires high humidity; low humidity can cause physiological stress, leading to chlorosis (yellowing) as the plant struggles with transpiration.

Common

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How to confirm: Check if the leaf edges are also turning brown or crispy alongside the yellowing.

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

Bleuhome 6-Pack 6in Plant Saucers Black

Pot Saucers

$6

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

Flora Premium Plant Mister

Spray Bottles

$12

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3 Monitor soil moisture levels closely to ensure the plant is not drying out too quickly due to the low humidity environment.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Salt Accumulation from Fertilizers

Excessive buildup of mineral salts from tap water or over-fertilization can burn the roots of sensitive Anthurium cultivars, resulting in yellowing leaves.

Common

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How to confirm: Look for a white, crusty residue on the surface of the potting medium or the rim of the pot.

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1 Flush the soil thoroughly with distilled or demineralized water to leach out accumulated mineral salts from the root zone.

2 Repot the plant in fresh, well-draining potting medium to completely remove old, salt-saturated soil.