Phalaenopsis Bud Blast: Temperature Swings, Ethylene Gas, and Prevention

Why Buds Yellow and Drop

Two spikes, some buds opening beautifully, others yellowing and falling at touch. Plant looks healthy—so what's killing selective buds?

Sudden temperature changes >15°F - immature buds are hypersensitive
Ripening fruit nearby - ethylene gas kills buds/flowers. Keep fruit 10+ feet away
Low humidity / poor air circulation - contributing factors

Large, near-open buds withstand fluctuations. The earliest, smallest buds are most vulnerable.

Orchids: Camellia Deaths in Central Valley: Drainage and Soil Organic Matter; Malformed Orchid Buds: Causes, Solutions & When to Remove Them; New Phalaenopsis Bud Blast: Cold, Roots, or Both?; Orchid Buds Oozing Sap Then Withering: Fruit Gas or Temp Shock?; Why Phalaenopsis Buds Die Before Opening: Ethylene, Temperature, and Paint Fumes; Saving a Rotting Phalaenopsis: Last-Chance Repotting and Patience; Phalaenopsis Bud Blast: Why Buds Die Before Opening; Phalaenopsis Bud Blast: Identifying Environmental Triggers; Cymbidium Division Decline After Repotting: Fly Infestation and Cultural Reset; Phalaenopsis Bud Blast: To Cut or Not to Cut Dying Buds

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