Citrus meyeri Yellow Leaves - Causes & Fixes

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Nitrogen Deficiency

Nitrogen is a mobile nutrient; when lacking, Meyer Lemons will mobilize nitrogen from older leaves to new growth, causing uniform yellowing of mature foliage first. This often occurs in citrus grown in containers where nutrients leach out quickly.

Very Common

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

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1 Apply a nitrogen-rich organic fertilizer to replenish the soil nutrients and stop the yellowing of older leaves.

Back to the Roots Blood Meal & Gypsum (4 Pack)

Organic Fertilizer

$40

Out of Stock

2 Check the soil moisture levels with a meter to ensure the nitrogen is being effectively absorbed by the roots and not being washed away by overwatering.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

3 If the plant is in a container, consider repotting with a fresh, nutrient-dense organic potting mix to prevent future leaching.

Espoma Organic Potting Soil Mix

15.1 L

$22

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Overwatering and Root Hypoxia

Meyer Lemons are highly susceptible to root rot (Phytophthora) if soil remains saturated. Lack of oxygen in the root zone prevents nutrient uptake, leading to chlorosis and eventual leaf drop.

Very Common

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How to confirm: Stick your finger two inches into the soil; if it is damp but leaves are yellowing, check for a musty smell or mushy roots.

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1 Immediately check the soil moisture level using a meter to confirm if the root zone is still saturated.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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2 Repot the plant in a well-draining medium and add perlite to improve aeration and prevent future hypoxia.

3 Ensure the plant is in a pot with excellent drainage and avoid letting it sit in a saucer of standing water.

Root & Vessel Majestic Low Profile Black 6.5"

6.5" • Plastic

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Iron Chlorosis

High soil pH (alkaline) prevents Meyer Lemons from absorbing iron. This results in 'interveinal chlorosis,' where the leaf tissue turns yellow but the veins remain dark green.

Common

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How to confirm: Check if the yellowing is specifically localized between the veins of very young, new leaves.

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1 Lower the soil pH by applying an acidifying fertilizer to make iron more bioavailable to the roots.

FoxFarm Happy Frog Acid Loving Plant Fertilizer

Organic

$22

In Stock

2 Monitor soil moisture levels closely with a moisture meter to ensure the soil does not become too alkaline or waterlogged, which can exacerbate nutrient lockout.

GROWIT Analog Soil Moisture Meter

Water Meters

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3 Supplement with a chelated iron or acid-loving plant food to directly address the iron deficiency.

FoxFarm Happy Frog Acid Loving Plant Fertilizer

Organic

$22

In Stock

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Citrus Leafminer Damage

Larvae of the leafminer moth tunnel through the leaf tissue, causing physiological stress that can lead to localized yellowing and necrotic blotches as the leaf structure fails.

Common

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How to confirm: Inspect the surface of the leaves for silvery, serpentine trails or 'mines' winding through the foliage.

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1 Inspect leaves for silvery, serpentine tunnels and prune away heavily damaged or necrotic leaves to prevent further larval spread.