I did a search for "Citrus wood smoking" on google, and found this place: http://www.citruswoodchips.com/ . I have not used them, so can't say how they are. The Citrus trees in So. California are being attacked by a bug that was brought in from Asia. This bug transmits a disease to the tree, and kills it. There is no known cure for the disease. I would be cautious about the possibility of spreading this problem to other areas of the U.S.