I'm sure Marley will have the definitive opinion on the matter.
Indeed, indeed!
I have to inform you that this ash fetish is a waste of time. Once done with the corporeal body, we (the wraiths of the world) have no further use for it. It is up to you what you do with it - some use it to promote the growth of roses, others scatter it to the four winds. Still others put it to good use - I am reliably informed that there are a number of egg-timers created this way.
As far as we are concerned, it is of no further interest other than purely academic.
That do you Snoops?