Capsicum annuum Sudden Leaf Drop - Causes & Fixes

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Water Stress (Overwatering or Drought)

Pepper plants are highly sensitive to fluctuations in soil moisture. Excessive water causes root hypoxia and rot, while extreme drought forces the plant to shed leaves to reduce transpiration and conserve moisture.

Very Common

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How to confirm: Insert your finger 2 inches into the soil; if it is soggy or bone-dry compared to usual, water stress is the culprit.

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

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

2 If overwatered, allow the soil to dry out completely before next watering and ensure the pot has adequate drainage; if drought-stricken, provide a deep, thorough watering.

Chapin 48000 0.5G Watering Can

2.3 L • Recycled Plastic

$12

In Stock

3 To stabilize the plant's recovery and prevent further stress, apply a microbial-based liquid fertilizer to support root zone development.

FoxFarm Bush Doctor Boomerang Liquid Plant Fertilizer 1 Pint

0.5 L • 1 pcs

$20

In Stock

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Temperature Shock

Capsicum annuum thrives in warm temperatures. A sudden drop in nighttime temperatures (below 15°C/60°F) or exposure to extreme heat waves can trigger a physiological stress response resulting in leaf abscission.

Very Common

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How to confirm: Check recent weather logs for sudden temperature swings or frost events in your growing area.

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1 Move the plant to a stable environment with consistent temperatures, avoiding drafts or sudden temperature fluctuations.

2 Apply a microbial-based fertilizer to help the plant recover from environmental stress and support root zone development.

FoxFarm Bush Doctor Boomerang Liquid Plant Fertilizer 1 Pint

0.5 L • 1 pcs

$20

In Stock

3 Monitor soil moisture closely to ensure the plant is not experiencing additional stress from over or under-watering during its recovery phase.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Phytophthora Blight

This soil-borne oomycete attacks the crown and root systems of pepper plants. As the vascular system fails due to infection, the plant can no longer support foliage, leading to rapid wilting and leaf drop.

Common

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How to confirm: Examine the base of the stem for dark, water-soaked lesions or signs of mushy decay.

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1 Remove and destroy all infected plant material and debris to prevent the spread of the soil-borne pathogen.

2 Improve soil drainage and aeration by incorporating horticultural perlite to reduce the moisture levels that favor Phytophthora growth.

3 Apply a copper-based fungicide to the soil and crown area to help control the spread of the blight.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

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Nutrient Deficiency (Nitrogen)

Severe nitrogen deficiency prevents the plant from maintaining chlorophyll and new tissue growth. In advanced stages, the plant will mobilize nitrogen from older leaves to newer growth, causing older leaves to yellow and drop.

Common

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How to confirm: Look for uniform yellowing starting with the bottom-most leaves of the plant.

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shopping_cart Recommended Products

1 Apply a nitrogen-rich liquid fertilizer to provide immediate nutrient uptake and stop the mobilization of nitrogen from older leaves.