Peel a mature pineapple. Bend the pineapple skin back. Pick the small black seeds from the fruit’s inside rind.
Rinse the seeds well. Set them aside.
Put the seeds in a small jar. Cover the seeds with sulfuric acid. Screw the lid on the jar. Let the seeds sit for 10 minutes. Pineapple seeds are typically very slow to germinate. Scarifying the seeds in sulfuric acid speeds up the germination process, which could otherwise take up to six months.
Plant the seeds in a small pot full of well-draining, sandy soil. Add enough water to moisten the soil.
Place plastic wrap over the top of the pot. Secure the plastic wrap with a rubber band. Place the pot on a windowsill, on your back porch, or any other area where it can receive both full and indirect sunlight.
Remove the plastic wrap and water the soil frequently enough to keep it moist. According to the Purdue University Center for New Crops and Plant Products, the seeds germinate in approximately 10 days.