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Mandevilla Plants

Q.Mandevilla Blossoms Fall Off

Anonymous added on November 15, 2010 | Answered

I have a yellow mandevilla. It looks very healthy, but the blossoms start to open, and then they fall off. I don’t see any pests.

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Certified GKH Gardening Expert
Answered on November 17, 2010

It could be that it is just a little underwatered, just enough so that it can't support its flowers and so it drops them.
It could also be that you have thrips. These are tiny pests that attack the base of buds and cause them to fall off. They can be very hard to see.
I would recommend increasing water just a bit and also treat the plant for thrips. This article will help:

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