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Identifying spider mites on Hydrangea
Fine stippling and bronzing on leaves, with delicate webbing on the undersides in heavier infestations, most common during hot, dry spells.
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Life cycle
Complete life cycle in 1–2 weeks in hot, dry conditions. Can produce 13+ generations per year.
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Damage to Hydrangea
Feeding causes stippled, bronzed leaves and can lead to significant leaf drop in heavy infestations, particularly stressful for a plant that already dislikes drought.
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How to treat spider mites on Hydrangea
Spray forcefully with water to dislodge mites, and ensure the plant is well-watered, since drought stress makes infestations worse.
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Preventing spider mites on Hydrangea
Keep hydrangea consistently watered and mulched, since well-hydrated plants are naturally more resistant to spider mites.