Capsicum annuum Favorita Sudden Leaf Drop - Causes & Fixes

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Water Stress (Overwatering or Underwatering)

Capsicum annuum is highly sensitive to moisture fluctuations; sudden leaf drop is a primary defense mechanism when roots are either drowning in anaerobic soil or desiccating due to lack of water.

Very Common

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How to confirm: Insert your finger 2 inches into the soil to check if it is bone dry or saturating much deeper than usual.

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1 Check the soil moisture level immediately by inserting a probe into the substrate to determine if the roots are drowning or desiccating.

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2 If the soil is waterlogged, repot the pepper in a well-draining medium enriched with perlite to improve aeration and prevent root rot.

3 If the soil is bone dry, thoroughly soak the plant and ensure the pot has proper drainage to stabilize moisture levels.

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Temperature Shock

Ornamental peppers are tropical in origin and cannot tolerate sudden drops in temperature, especially below 50°F (10°C), which triggers abscission to protect the plant's core.

Very Common

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How to confirm: Check if there has been a recent cold snap or if the plant is sitting near a drafty window/AC vent.

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1 Move the plant to a stable, warm environment, ensuring temperatures remain consistently above 60°F (15°C) to prevent further stress.

2 Avoid placing the plant near cold drafts, open windows, or air conditioning vents that could trigger further temperature fluctuations.

3 Monitor soil moisture closely using a moisture meter, as temperature changes can alter evaporation rates and lead to root stress.

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Root Rot (Phytophthora spp.)

Fungal pathogens in overly damp soil destroy the fine root hairs of the Favorita cultivar, making it impossible for the plant to support its foliage.

Common

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How to confirm: Gently lift the plant from its pot to inspect if the roots are dark, slimy, or emitting a foul odor.

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1 Immediately remove the plant from its current container and prune away any mushy, blackened, or foul-smelling roots to stop the spread of the pathogen.

2 Repot the pepper plant in a fresh, well-draining medium enriched with perlite to improve aeration and prevent future waterlogging.

3 Apply a fungicide treatment to the soil and foliage to combat the remaining Phytophthora spores.