Oregano is fine but I prefer Mixed Herbs as it will not be just Bamboo litter. It tends to bind other garden litter in with it. I know as I have just dug out 2 massive Bamboo plants (infestations after the initial planting). I have been told they are in effect a weed and they have demolished a fence section. Roots were 2 foot deep, needed a Bobcat and an excavator to remove them.