Answer:
I'm a green veggie that looks like a tiny tree.
You roll it or you buy it, People say you shouldn't try it, Because you may get a stroke, From inhaling all that smoke.
Old people and owls are said to be this.
If you drive on this, pedestrians and the police will be pretty upset with you.
I'm a long curved fruit that grows in clusters and has soft pulpy flesh and yellow skin when ripe.
What is the middle of water but is not an island?