Fun Facts about Pineapples: It takes 2 years for them to grow, and only 1 pineapple grows per plant. Their are over 6 different kinds of pineapples. If you take the top off of a full grown pineapple, you can plant it, wait 2 years and get another one! Also, their is a really neat way to cut pineapple to get the most for your money. If you go to the Dole website, they have a knife for $6 that works wonders!!