Answer:
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
People need me yet they give me away every day.
I have a name written on me, but it isnβt my name. Men plant me, but I never grow. They look at me and see their future, rotting in my bloom.
I come without being fetched at night, hide away as soon as daylight strikes. Although I may look small, I am much mightier than what you can imagine. What am I?
I have a brother. However much we run we do not reach each other.
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.