Salix caprea Yellow Leaves - Causes & Fixes

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Nitrogen Deficiency

Nitrogen is a mobile nutrient; when deficient, Salix caprea will mobilize nitrogen from older leaves to newer growth, causing uniform chlorosis (yellowing) starting with the bottom foliage.

Very Common

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How to confirm: Check if the yellowing began on the oldest leaves at the base of the plant while new growth remains green.

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shopping_cart Recommended Products

1 Apply a nitrogen-rich organic fertilizer to the soil to replenish the depleted nutrient levels.

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

Organic Fertilizer

$40

Out of Stock

2 Supplement the soil with organic worm castings to provide a slow-release source of nitrogen and beneficial microbes.

Back to the Roots Organic Worm Castings 5lb

Worm Castings

$17

In Stock

3 Monitor the soil moisture levels using an analog meter to ensure the nitrogen is being effectively absorbed by the roots.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Waterlogging and Root Hypoxia

While Goat Willow is water-tolerant, prolonged saturation in poorly drained soils can lead to root hypoxia, preventing oxygen uptake and causing leaves to turn pale yellow before dropping.

Very Common

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How to confirm: Assess the soil drainage around the root zone to see if water is pooling or if the substrate remains saturated for several days.

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shopping_cart Recommended Products

1 Improve soil drainage immediately by aerating the soil around the root zone or adding perlite to increase oxygen availability.

2 Check the soil moisture levels deeply with a meter to ensure the root zone is not staying saturated for too long.

GROWIT Analog Soil Moisture Meter

Water Meters

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3 If the plant is in a container, repot into a well-draining medium using a mix of organic soil and horticultural perlite.

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Iron Chlorosis

In high-pH (alkaline) soils, iron becomes chemically unavailable to the Salix caprea, resulting in interveinal chlorosis where leaf veins remain green but the rest of the leaf turns yellow.

Common

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How to confirm: Examine if the yellowing is strictly confined to the areas between the leaf veins, particularly on newer leaves.

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shopping_cart Recommended Products

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

FoxFarm Happy Frog Acid Loving Plant Fertilizer

Organic

$22

In Stock

2 Apply a chelated iron supplement or a specialized acid-loving fertilizer to provide immediate iron uptake.

FoxFarm Bush Doctor Cal Mag Liquid Supplement 1 Pint

0.5 L • 1 pcs • Organic

$22

In Stock

3 Monitor soil acidity levels regularly using a pH tester to ensure the environment remains suitable for iron absorption.

YAMRON 4-in-1 Digital Soil Tester

Water Meters

$33

In Stock

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Phytophthora Root Rot

Oomycete pathogens like Phytophthora can attack the root system of Salix species, disrupting the vascular transport of water and nutrients, which manifests as wilting and yellowing leaves.

Common

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How to confirm: Inspect the base of the stem for dark, water-soaked lesions or signs of decay near the soil line.

build How to fix it

shopping_cart Recommended Products

1 Inspect the root system for mushy, dark, or foul-smelling roots and prune away any decayed sections using sterilized tools.

2 Improve soil drainage and aeration by incorporating horticultural perlite or coarse sand into the potting medium to prevent waterlogged conditions.

3 Reduce watering frequency and use a soil moisture meter to ensure the substrate is allowed to dry out between waterings, preventing further pathogen spread.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock