Burning incense and other herbs & botanicals has been practiced around the world since the beginning of time by all cultures. The term "smudge" relates to a Native American/Indigenous tradition involving sacred rituals, offerings, and invocations. It is not the same as smoke cleansing, and the terms should not be used interchangeably. I will not go into detail here, because frankly I am no expert on the topic and I don't want to spread mis-information or unknowingly disrespect any cultures. Besides, many have shared their knowledge on this topic. A simple internet search will give you great results. Look up “the difference between smudging and smoke cleansing” .
All of the materials used in my smoke cleansing supplies have been ethically sourced and harvested by myself to ensure the plants are not damaged for future seasons by my harvesting of them.