Hydrangea macrophylla Magical Flamenco Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are common pests on Hydrangeas that pierce the plant tissues to suck sap, excreting a sugary substance called honeydew. This residue creates the characteristic sticky texture on the leaf surfaces.

Very Common

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How to confirm: Inspect the undersides of the leaves and new buds for tiny, soft-bodied insects.

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1 Apply an organic insecticide to eliminate the aphid population and stop the production of honeydew.

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2 Gently wash the leaves with water to remove the sticky residue and prevent the growth of sooty mold.

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3 Inspect the undersides of leaves and new growth regularly to catch any remaining pests before they multiply.

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Scale Insects

Scale insects attach themselves to the stems or leaves of the Hydrangea and feed on phloem sap. Like aphids, they excrete honeydew which coats the 'Magical Flamenco' foliage in a sticky film.

Very Common

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How to confirm: Look for small, immobile bumps or waxy scales firmly attached to the stems or leaf petioles.

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shopping_cart Recommended Products

1 Apply an organic insecticide spray to the foliage and stems to kill existing scale insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Wipe the sticky honeydew residue off the leaves with a damp cloth to prevent fungal growth and allow the plant to breathe.

3 Inspect the undersides of leaves and crevices for any remaining pests to prevent a secondary infestation.

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Whitefly Infestation

Whiteflies congregate on the undersides of hydrangea leaves and feed on plant fluids. Their presence often results in a sticky residue accompanied by small white flying insects when the plant is disturbed.

Common

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How to confirm: Gently shake a branch over a white surface to see if tiny white insects fly out from under the leaves.

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shopping_cart Recommended Products

1 Apply an organic insecticide spray to the undersides of the leaves to eliminate adult whiteflies, larvae, and eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Place yellow sticky traps near the plant to capture flying adults and monitor the progress of the infestation.

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3 Wipe the sticky residue off the leaves with a damp cloth to prevent the growth of sooty mold.

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Sooty Mold (Secondary Symptom)

While not the primary cause of stickiness, sooty mold is a black fungus that grows specifically on the honeydew left by pests. It can make the leaves appear dirty or coated in a dark, sticky grime.

Common

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How to confirm: Check if there is a black, velvety coating spreading across the sticky areas of the foliage.

build How to fix it

shopping_cart Recommended Products

1 Identify and treat the underlying pest causing the honeydew secretion, such as aphids or scale, using an organic insecticide spray.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wash the leaves with a soft cloth and water to remove the black sooty mold residue and restore photosynthesis.

3 Monitor soil moisture levels to ensure the plant is not under environmental stress, which can make it more susceptible to pest infestations.