Riddle: You use a knife to slice my head and weep beside me when I am dead. What am I?

Question

I am covered with milky soft coat &

When my head glows red,

I slowly sink into a white bed,

Never to stand again.

Who Am I?

Answer 1

Its Onion.

As cut onion with knife and while cutting person will cry

Answer 2

it is onion.

Answer 3

Onion. We use the knife to cut the Onion's head and we cry (weep) when its cut (dead)

Answer 4

Answer:
ONION
we use a knife to slice it's head and weep beside it when I am dead.