I have little success removing the stains you are refering to. So many variables! Clay pots, wicker baskets, as you mentioned-bamboo, metal of various types, soil/water/fertilizer, ect. If the stain is run-off from over-watering a plant that has a plastic pot or plastic pan under it, orange deoderizer and/or coffee remover will work if your 101/pro-spotter fails. Good luck with any of the others. I’ve heard of minimal success w/ our wood stain remover. Always keep in mind that most of our “special stain removers” work best if applied to dry carpet fibers. Also, dwell time is your friend.