Orchids are sensitive to any sudden changes in their environment – and they’re particularly sensitive to rapid changes in temperature.
One of the most common reasons why a newly purchased orchid will suddenly lose its flowers is because the plant goes through “shock” when it is suddenly introduced to a new environment – namely your home. Healthy orchid plants with buds that shrivel and fall off the stem before they have a chance to open suffer what’s called “bud blast.”
The photo to the left is of a phalaenopsis orchid suffering bud blast.
You can prevent bud blast and flower blast by closely monitoring your orchids temperature changes (see my special post, Orchid Care and Maintenance Tips : Temperatures for Orchids for more info.) Protect orchids from sudden cool and heat temperatures changes like strong air conditioning/heating or drafts from windows/doors.
Warmest wishes from sunny Florida,
The Orchid Care Lady