Lilium OT Catina Yellow Leaves - Causes & Fixes

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Overwatering and Poor Drainage

OT hybrids like 'Catina' are susceptible to root suffocation. Excessive moisture prevents oxygen from reaching the roots, leading to chlorosis (yellowing) of the lower leaves as the plant struggles to transport nutrients.

Very Common

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How to confirm: Stick your finger two inches into the soil; if it feels soggy or smells sour, you are overwatering.

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1 Immediately stop watering and allow the soil to dry out significantly to prevent further root rot.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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2 Repot the lily in a well-draining medium, incorporating perlite to improve aeration and prevent future waterlogging.

3 Ensure the plant is in a container with functional drainage holes and use a saucer to catch excess water, making sure not to let the pot sit in standing water.

Bleuhome 10" Plant Saucer 6-Pack Black

Pot Saucers

$20

In Stock

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Nutrient Deficiency (Nitrogen)

Lilies have high metabolic demands during their growth phase. A lack of nitrogen causes older, lower leaves to turn yellow first as the plant mobilizes mobile nutrients to newer growth at the tip.

Very Common

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How to confirm: Observe if the yellowing starts at the base of the stem and moves upward toward the bloom.

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1 Apply a nitrogen-rich liquid fertilizer to boost vegetative growth and restore green color to the foliage.

FoxFarm Grow Big Liquid Plant Food 1 Quart

0.9 L • 1 pcs

$30

In Stock

2 Monitor soil moisture levels using a moisture meter to ensure the nitrogen is being effectively absorbed without causing root rot.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Prune any completely yellow or dead leaves to prevent the plant from wasting energy on non-functional foliage.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

In Stock

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Botrytis Lilianum (Lily Blight)

This fungal pathogen thrives in humid conditions around OT hybrids. While it often causes spotting, early stages of infection can cause general yellowing and wilting of foliage.

Common

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How to confirm: Inspect the yellow leaves for small, brown, water-soaked spots or fuzzy grey mold.

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1 Remove and destroy all infected, yellowing leaves immediately to prevent the fungal spores from spreading to healthy foliage.

2 Apply an organic fungicide to the affected plant to control the spread of the Botrytis pathogen.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

3 Improve air circulation around the lilies and avoid overhead watering to reduce the humidity that promotes fungal growth.

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Temperature Stress/Sunscald

Extreme heat or sudden intense sunlight can overwhelm 'Catina's' foliage. This physiological stress causes the chlorophyll to break down, resulting in yellowing leaves.

Rare

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How to confirm: Check if the yellowing is accompanied by scorched, dry patches on the leaf surface during hot afternoons.

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1 Move the plant to a location with filtered sunlight or afternoon shade to protect the foliage from direct, intense heat and prevent further sunscald.

2 Monitor soil moisture levels closely to ensure the plant remains hydrated during heat waves, using a moisture meter to prevent dehydration.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 Apply a liquid seaweed fertilizer to help the plant recover from physiological stress and boost nutrient uptake.