In temperate climates it is deciduous, so unless you live some place that's
warm most of the year, I wouldn't worry.
Cheers,
Alwynne

"M&M" wrote in message
...
Hi I have a lovelly mandevilla growing over an arch in the garden; I
can't
remember what happened to it this time last year, but it has suddenly lost
all of its leaves and looks as though it is about to flake it. I know
that
it is meant to be a perrenial, but surprised by the timing of defoliation.
Can anyone please advise me if this seems to be the normal habit or
not....

Thanks.