First, use a sharp knife to take off the top of the pineapple. Be sure to include a piece of the shell in your cut.
Second, place the `crown` in a glass of water. Keep it for a period of 3 days in a lighten area.
Third, when you see little roots coming out your glass-pineapple, plant the whole thing in a big jar. Water twice a week at most.
After 2 years your plant will be ready to be harvested. Try not to overreact with irrigation: the pineapple plant can be watered twice a week right in the middle of the crown, as long as it is inside your house.