Citrus paradisi Yellow Leaves - Causes & Fixes

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Nitrogen Deficiency

Nitrogen is a mobile nutrient; when lacking, the plant moves it from older leaves to new growth, causing uniform yellowing (chlorosis) starting with the oldest foliage.

Very Common

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How to confirm: Observe if the yellowing is primarily occurring on the bottom-most leaves of the grapefruit tree first.

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shopping_cart Recommended Products

1 Apply a nitrogen-rich organic fertilizer to replenish the soil nutrients and stop the progression of chlorosis.

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

Organic Fertilizer

$40

Out of Stock

2 Supplement with a liquid seaweed fertilizer to boost nutrient uptake and support overall plant vigor during recovery.

FoxFarm Bush Doctor Kelp Me Kelp You Liquid Seaweed Fertilizer 1 Quart

0.9 L • 1 pcs

$32

In Stock

3 Ensure the plant is in well-draining soil to prevent nitrogen leaching from overwatering.

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Overwatering and Root Hypoxia

Grapefruit trees are highly sensitive to waterlogged soil, which displaces oxygen in the rhizosphere and leads to root rot, preventing nutrient uptake.

Very Common

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How to confirm: Check if the soil remains saturated for long periods and if the leaves feel limp along with the yellowing.

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shopping_cart Recommended Products

1 Immediately stop watering and allow the soil to dry out significantly to restore oxygen levels to the root zone.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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2 Check the drainage of your container; if the soil remains saturated, repot the tree in a well-draining medium amended with perlite to prevent future hypoxia.

3 Apply a liquid seaweed fertilizer to help the plant recover from the stress and boost nutrient uptake once the soil moisture is stabilized.

FoxFarm Bush Doctor Kelp Me Kelp You Liquid Seaweed Fertilizer 1 Quart

0.9 L • 1 pcs

$32

In Stock

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Iron Chlorosis

Common in high-pH (alkaline) soils, iron becomes chemically unavailable to the citrus tree, resulting in bright yellow leaves with distinct green veins.

Very Common

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How to confirm: Look for a 'interveinal' pattern where the veins remain dark green while the rest of the leaf turns pale yellow.

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shopping_cart Recommended Products

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 Supplement with a chelated iron or specialized citrus nutrition to quickly address the deficiency.

FoxFarm Happy Frog Citrus and Avocado Fertilizer

1 pcs • Organic

$21

In Stock

3 Monitor soil moisture levels using a moisture meter to ensure the tree is not experiencing water stress, which can exacerbate chlorosis.

GROWIT Analog Soil Moisture Meter

Water Meters

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Citrus Leafminer (Phyllocnistis citrella) Damage

Larvae tunneling through leaf tissue disrupt photosynthesis and can cause leaves to curl and turn yellow due to physiological stress.

Common

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How to confirm: Inspect the surface of young, tender leaves for winding, silvery serpentine tracks.

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shopping_cart Recommended Products

1 Apply an organic insecticide to eliminate larvae and protect new growth from further tunneling.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Prune and carefully dispose of heavily infested or curled leaves to reduce the pest population.

3 Monitor soil moisture levels to ensure the plant is not experiencing secondary stress from overwatering.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Magnesium Deficiency

Magnesium deficiency often manifests as interveinal chlorosis, specifically targeting older leaves as the tree redistributes magnesium to newer shoots.

Common

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How to confirm: Examine if the yellowing pattern is concentrated on the edges of older leaves while veins remain green.

build How to fix it

shopping_cart Recommended Products

1 Apply a magnesium-rich supplement to the soil to quickly address the deficiency and prevent further interveinal chlorosis.