Eastern Snowball Bush Decline: Overwatering or Powdery Mildew?

Eastern Snowball Bush Decline: Overwatering or Powdery Mildew?

New Eastern Snowball (Viburnum opulus 'Roseum'?) 3 ft tall, watered nightly, partial sun, inner leaves browning outward: likely overwatering (daily is excessive) or powdery mildew (poor air circulation, cool nights/warm days).

Immediate Fixes

• Stop daily watering. Water deeply 2–3 times/week (adjust for rain).
• Check planting depth: root flare at soil level.
• Ensure container drainage if potted.
• For powdery mildew: improve air flow, water at base, apply fungicide if severe.

Prevention

• Space plants for air circulation.
• Morning watering only.
• Low nitrogen fertilizer.
• Fall cleanup of leaves.

Viburnums need moist but well-drained soil; daily watering causes root rot.