Muy Thai fighters in Thailand kick bananna trees. Not sure if you really wanna' try it, but you could try to find a smaller tree and do your kicks on that.
"I don't want them to like me, because when I'm in the ring, punches fly to the face. It is not a tenderness time. I am not falling in love. And he knows that when the fight starts I am kicking faces."
- Wanderlei Silva