The Ananas comosus (pineapple) is a bromeliaceae from the Central and South America known for his delicious infructescense. The name Ananas, come from náná náná which means "the perfume of perfume" in a native language of Brazil. The duplication this plant is really easy.
Step 1: What Do You Need
-Pineapple, not too ripe, with a healthy rosette
-A good knife, a bread knife works fine
-A pot, you can be creative and use your imagination
-Soil, go for an easy-to-drain soil (ex.: for bonzaï or cactii mix)
Step 2: Cut the Head
It's important to have a perfectly healthy rosette, reducing the risk of rotting and increase chance of success. Cut and keep the head, prepare the edible part for later.
Step 3: Prepare the Head
Delicately detach the contour of the remaining edible part. Discard this part.
Step 4: Remove Some Leaves
Remove some leaves, keep few just enough for the plant. Be careful with the tag rope punched inside the heart of the pineapple head. Remove the leaves until you see no more holes and be sure the leaves are firm and perfectly healthy with no brown spot.
Step 5: Potting
Take your pot and fill it with soil. I used for my pot a can of maple syrup which I punched draining holes in the bottom. Place the stem in the pot filled with the soil and compress the soil around the stem firmly just enough to keep it snug in place. Keep the soil damp and well drained. Too much water will cause rot and decrease chance of success.
Step 6: Watch It Grow and Enjoy!
At the first weeks, the tips of the leaves will turn brown, because the roots are not fully grown yet to dispatch water in the plant sufficiently, and it's normal, as long as the middle part is green and healthy. Be patient and don't give up, the first tries may fail, but once the plant has a good start, it lasts few years!
P.S.: In the future, I'll make an instructable about how to make a fruit of it.