For School, how long does it take an opium poppy to get a "stalk"?

I have this paper coming up in medicine and need to know how long it takes the opium popy to get its stalk then leaves , in days perhaps, Much thanks

For School, how long does it take an opium poppy to get a "stalk"?
This isnt exact but it's a start....





http://www.a1b2c3.com/drugs/opi006.htm