Onion Keep Well F1 Drooping Leaves - Causes & Fixes

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Water Stress (Drought or Overwatering)

Onions require consistent moisture to develop bulbs; drought causes leaves to lose turgor pressure and wilt, whereas waterlogged soil leads to root hypoxia and subsequent leaf drooping.

Very Common

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How to confirm: Stick your finger 2 inches into the soil to check if it is bone dry or excessively muddy.

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1 Check the soil moisture level at the root zone using a moisture meter to determine if the soil is bone dry or waterlogged.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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2 If the soil is dry, water the onion beds thoroughly to restore turgor pressure; if the soil is saturated, improve drainage or reduce watering frequency.

3 Ensure the planting area has excellent drainage by incorporating horticultural perlite into the soil to prevent future root hypoxia.

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Allium Leaf Blight (Peronospora destructor)

This fungal pathogen causes leaves to wilt, droop, and eventually develop water-soaked lesions that can lead to total plant collapse in humid conditions.

Very Common

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How to confirm: Inspect the undersides of the drooping leaves for a grayish-purple fungal growth or fine mold spores.

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1 Remove and destroy all infected plant material immediately to prevent the fungal spores from spreading to healthy onions.

2 Apply an organic fungicide to the remaining healthy plants to control the spread of the blight.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

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

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Nutrient Deficiency (Nitrogen)

A lack of nitrogen prevents the plant from maintaining cell structure and chlorophyll levels, resulting in pale, limp, and drooping foliage.

Common

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How to confirm: Look for a distinct yellowing (chlorosis) starting from the tips of the leaves moving down the blade.

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1 Apply a nitrogen-rich organic fertilizer to boost chlorophyll production and restore leaf structure.

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

Organic Fertilizer

$40

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2 Check 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 Ensure the plant is receiving adequate sunlight to support the metabolic processes required for nutrient uptake.

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Onion Maggot Damage (Delia scripta)

Larvae feeding on the fleshy base of the onion plant destroy the vascular tissue, preventing water transport to the leaves and causing them to collapse.

Common

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How to confirm: Carefully pull a drooping plant to see if there are small white larvae near the bulb or root base.

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1 Inspect the base of the onion bulbs for larvae and remove any heavily damaged plants to prevent further spread.

2 Apply an organic insecticide to target any remaining larvae or pests in the soil area.