Hydrangea macrophylla Magical Bolero Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are small, soft-bodied insects that pierce the tender new growth of Hydrangeas to suck sap, excreting a sugary substance known as honeydew. This residue creates a visible sticky film on the leaf surfaces.

Very Common

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How to confirm: Inspect the undersides of young leaves and stem nodes for tiny, green or black moving insects.

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

Bonide Captain Jack's Neem Oil 32 oz

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2 Gently wash the sticky residue off the leaves using a soft cloth or a gentle stream of water to prevent fungal growth.

3 Inspect the undersides of new growth regularly and use yellow sticky traps to monitor for any returning pests.

Super Ninja Fungus Gnat Traps - 30 Pack

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Scale Insects

Scale insects attach themselves to the stems and leaf petioles of the hydrangea, feeding on plant fluids and secreting honeydew. Unlike aphids, these pests often look like small, stationary bumps or bumps on the plant tissue.

Very Common

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How to confirm: Look for small, waxy, or brownish bumps on the stems that can be scraped off with a fingernail.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to the plant to eliminate the scale insects and stop the secretion of honeydew.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Physically remove visible scale bumps from stems and leaves using a soft cloth or cotton swab dipped in rubbing alcohol.

3 Clean the surrounding area and plant leaves to remove the sticky honeydew residue and prevent secondary mold growth.

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Whitefly Infestation

Whiteflies congregate on the undersides of hydrangea leaves; as they feed, they release honeydew that coats the foliage in a sticky layer. This can often be accompanied by a fine white powder-like appearance.

Common

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How to confirm: Gently shake a branch near a light source to see if tiny white insects fly upward.

build How to fix it

shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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

3 Use yellow sticky traps to capture adult whiteflies and monitor the severity of the infestation.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

$7

In Stock

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Sooty Mold (Secondary Infection)

While not the primary cause of stickiness, sooty mold is a black fungus that grows specifically on the honeydew left by sap-sucking insects. The presence of black, velvety patches on 'Magical Bolero' leaves confirms an underlying insect issue.

Common

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How to confirm: Check if the sticky residue is accompanied by a dark, soot-like coating on the leaf surface.

build How to fix it

shopping_cart Recommended Products

1 Identify and treat the underlying sap-sucking insects (such as aphids or scale) that are producing the sticky honeydew by applying an organic insecticide.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wash the black, velvety sooty mold off the leaves using a soft cloth and water to restore the plant's ability to photosynthesize.

3 Monitor the plant's moisture levels to ensure the environment does not become overly humid, which can encourage fungal growth.