Lavandula White Cottony Spots - Causes & Fixes

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Mealybugs

These sap-sucking insects produce a white, waxy, cottony secretion to protect themselves while feeding on lavender stems and buds. They often congregate in the crevices of the plant's nodes and can weaken the woody structure.

Very Common

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How to confirm: Use a magnifying glass to look for small, slow-moving white insects tucked into the leaf axils or base of flowers.

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1 Isolate the lavender plant immediately to prevent the mealybugs from spreading to other plants in your collection.

2 Apply an organic insecticide spray to the plant, ensuring you coat the undersides of leaves and the crevices of stems where the white secretions are visible.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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3 Gently wipe away any visible cottony clusters with a cotton swab dipped in isopropyl alcohol to kill the insects on contact.

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Powdery Mildew

This fungal pathogen manifests as a white, dusty coating on leaves and stems, often appearing like flour dusted on the plant. It thrives in high humidity and poor air circulation, common issues for lavender planted too densely.

Very Common

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How to confirm: Check if the white spots can be rubbed off easily with your finger; if it looks more like a surface film than an insect, it is likely fungal.

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1 Apply an organic fungicide to eliminate the existing fungal spores and prevent further spread across the lavender foliage.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Improve air circulation around the plant by pruning crowded stems and ensuring the lavender is not planted too densely.

3 Reduce humidity levels by avoiding overhead watering and ensuring the soil surface dries out between waterings.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Cottony Scale

Similar to mealybugs, these pests create white, fuzzy coverings over their bodies on the lavender stems. They interrupt the flow of nutrients, leading to stunted growth or premature wilting of the floral spikes.

Common

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How to confirm: Inspect the underside of the leaves and the woody stems for hard, raised bumps covered in white fluff.

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1 Treat the lavender with an organic insecticide spray to eliminate the cottony scale insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Carefully wipe away visible white fuzzy clusters from the stems using a cotton swab dipped in isopropyl alcohol to prevent further spread.

3 Prune away heavily infested stems to reduce the pest population and improve airflow around the plant.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

In Stock

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Botrytis (Gray Mold) - Early Stage

While typically associated with gray fuzzy growth, the initial stages of Botrytis on lavender flower buds can appear as pale, whitish patches. This is common in damp environments where lavender lacks proper drainage.

Common

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How to confirm: Examine if the white spots are accompanied by browning or rotting of the flower heads.

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shopping_cart Recommended Products

1 Prune and remove any affected flower buds or stems immediately to prevent the mold from spreading to healthy tissue.

2 Improve air circulation around the plant and ensure the soil is well-draining to reduce the dampness that fuels Botrytis growth.