Answer:
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
What gets broken without being held?
I plow and plow but never sow.
What has a head but never weeps a bed but never sleeps can run but never walks and banks but no money?
I am always around you but often forgotten. I am pure and clean most of the time, but occasionally rotten. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.