Answer:
Grows from the ground, bushes and grass, leaves of yellow, red and brow, unruly plants, get the axe, trim the hedge back down.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
What has three ways out and just one way in?
As round as an apple. As deep as a cup. All the king's horses can't pull it up.