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Rose of Sharon Bud Drop: Water, Fertilizer, or Pests?

Common Causes

Drought stress.
Excess fertilizer.
Pests (Japanese flea beetles).

Diagnosis

Bag dropped buds for a few days—insects may emerge. Take sample to county extension agent.

Seeding and Propagation: Why Rose of Sharon Buds Won’t Open: Botrytis Blight; Unknown Bush Similar to Rose of Sharon – Genetic Variation; Rose Buds Shriveling, Leaves Chewed in Colorado Mountains: Rose Midge + Sawfly; Why Climbing Roses Don't Bloom for Years and How to Encourage Flowers; Identifying Rose Bud Points: Where New Growth Emerges; Rose of Sharon Bud Drop: Gall Midge and Fertilizer Needs; Rose Buds Turning Black: Midge Damage or Heat Stress; Rose of Sharon: Hardy, Hummingbird-Friendly Shrub; Rose of Sharon Bud Drop: Water Stress or Natural Thinning; Rose of Sharon Bud Drop: Too Wet, Too Dry, or Just Natural

Garden Articles

Blackening Rose Buds: Rose Midge vs. Frost Damage on Mr. Lincoln Roses

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Why Isn't My Rose of Sharon Blooming? Troubleshooting a 4-Year-Old Shrub

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Troubleshooting Drooping Rose Buds in Humid Climates

Plants

Propagating Rose of Sharon and Viburnum: Seeds, Cuttings, and Pest Diagnosis

Shriveled Rose Buds with Brown Edges: Thrips or Rose Midge Damage

Planting Rose of Sharon Near Shallow Buried Utility Line

When to Prune Rose of Sharon: Fall vs. Late Winter

Transplanting a Mature Rose of Sharon: Timing and Technique

Diagnosing Partial Leaf-Out in Mature Rose of Sharon Shrubs

Rose of Sharon Late-Season Yellowing: Fertilizer Response

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