Lily Free Choice White Cottony Spots - Causes & Fixes

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Mealybugs

These small, soft-bodied insects secrete a white, waxy, cottony substance to protect themselves as they suck sap from the lily's stems and leaf undersides. They often cluster in crevices or near the base of the flower buds.

Very Common

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How to confirm: Inspect the axils where leaves meet the stem for tiny moving white insects or sticky residue.

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1 Isolate the lily from other plants immediately to prevent the mealybugs from spreading to your entire collection.

2 Apply an organic insecticide spray to the plant, ensuring you coat the undersides of leaves and crevices where the white waxy clusters reside.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible mealybug clusters from stems and buds.

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Botrytis Blight (Gray Mold)

Fungal spores can manifest as fuzzy, light-colored patches on lily petals or leaves, especially in high humidity. In its early stages, the mold may appear as whitish, necrotic spots before turning gray and causing rot.

Common

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How to confirm: Check if the white spots are accompanied by brown, decaying tissue on the flower petals.

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1 Remove and discard all infected petals and leaves immediately to prevent the fungal spores from spreading to healthy plant tissue.

2 Apply an organic fungicide to the affected areas to control the spread of the blight.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

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3 Improve air circulation around the plant and reduce humidity by avoiding overhead watering, which keeps the foliage dry.

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Powdery Mildew

This fungal disease presents as a white, flour-like coating on the surface of the lily leaves. It thrives in environments with moderate temperatures and high humidity with poor air circulation.

Common

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How to confirm: Rub the white spots with your finger to see if the powder can be wiped off the leaf surface.

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1 Apply an organic fungicide to the affected leaves to eliminate the powdery mildew spores and prevent further spread.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Improve air circulation around your lily by spacing plants further apart and ensuring they are not in overly humid, stagnant areas.

3 Prune and dispose of any heavily infected leaves to reduce the fungal load on the plant.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

$13

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Spider Mites

While primarily known for fine webbing, heavy infestations of spider mites on lilies can create a dusty, whitish appearance on the undersides of leaves. This is often accompanied by tiny yellow stippling (dots) on the leaf surface.

Common

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How to confirm: Hold a white piece of paper under a leaf and tap it to see if tiny specks fall onto the paper.

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shopping_cart Recommended Products

1 Treat the plant with an organic insecticide to eliminate the spider mite population and prevent further damage to the foliage.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Inspect the undersides of all leaves and wipe them down with a damp cloth to physically remove mites and webbing.

3 Increase humidity around the plant, as spider mites thrive in dry environments; consider using a fine mist spray.