Does pineapple seed need any vernalization before planting?
How long after pick it up from fruit I have to plant it?

From what I'm reading, vernalization is not necessary.

Also, you plant the crown, not the seeds.

You're looking at 2-3 years for fruit.

Here's a good article for you:
http://www.rickswoodshopcreations.co.../pineapple.htm

Thanks for your help