A question that I’ve been asked in the past is on how to dispose of offerings I make or have made to spirits I’ve worked with, or similar; I’ll be addressing that now.
In essence, offerings can be disposed of in whatever way you as a practitioner see fit or the spirit you’re offering to has told you; I have had plenty of experience with this in the past, and at first I buried it but found that to be impractical, so I just threw it in a gutter in front of my house or in the nearby brush. But in general, throwing it out with the rest of the trash is fine too, unless (again) the spirit tells you otherwise (rarely the case). Offerings in general are organic in nature, but even the ones that aren’t (these are the ones you usually leave on the spirit’s altar-recommended) are no exception when it comes to disposal. Organic food will rot away substantially quicker than it usually does by nature.
When it comes to duration with organic offerings, a few days is enough to leave them on said altar and take note to clean up afterwards, since it will be rotten or moldy and might give off a stench, etc. It’s just repeating the cycle afterwards on a periodical basis. Lastly, one can also consume the food itself, but I advise against it because the food has little to no astral nutrients for obvious reasons (know this from personal exp.).