Answer:
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
I am a time for gathering crops. Remove the first three letters and I become an object you can wear.
The more you have me the less you see. Shine a light on me and I shall flee.
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.