Answer:
I'm sometimes white and always wrong. I can break a heart and hurt the strong. I can build love or tear it down. I can make a smile or bring a frown.
I have a face, yet no senses. But I don't really care, because time is of the essence.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
I am always in front of you, but you will never see me. What am I?
Grows from the ground, bushes and grass, leaves of yellow, red and brow, unruly plants, get the axe, trim the hedge back down.
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?