At what time of day does this occur?

"Pam Gibbs" wrote in message
...
I have a crepe myrtle tree, not one of the shorter varieties, and not a
shrub, but a tree. Water drips from it constantly, as though it is
raining.
Recently my daughter moved into an older home with a HUGE very old crepe
myrtle tree in the yard, and it rains under that one all the time too. It
is not honey dew from aphids. It's water, like rain. What is this
phenomenon? Thanks!