The only superstition connected with removing decorations with which I am acquainted is a poem entitled "Candlemass Eve":
Down with Rosemary, and so
Down with Bays and Mistletoe;
Down with Holly, Ivy, all
Where with ye drest the Christmas Hall;
That to the superstitious find
Not one least Branch there left behind
For look, how many leaves there be
Neglected there, maids, trust to me,
So many goblins you shall see.
--Robert Herrick
Parish custom is that the trees and other decorations are removed before the Epiphany liturgy, unless Epiphany falls on a Sunday in which case they are removed after the liturgy.
Creche and the poinsettias which surround it remain through Candlemass.
The dozens of creches in my home remain up through Candlemass as well.
Last edited by Thomas the Seeker; 01/12/14 02:26 PM. Reason: Additional information and attribution