Pineapples are true sun worshippers. They need more light than most indoor plants.
The Rule: Provide at least six hours of direct, intense sunlight daily. This means the brightest south or southwest-facing window you have.
The Triumph: If you want a pineapple to fruit indoors (a rare but possible triumph), this light requirement is non-negotiable. If you can't provide this, consider supplementing with a bright grow light.
Summer Vacation: If temperatures are reliably above $50^{\circ}$F ($10^{\circ}$C) at night, place your pineapple outdoors in the full sun for the summer months. It will thrive!
As a bromeliad, the pineapple can handle a lot of water, but only if its base is allowed to dry out.
The Technique: Water thoroughly until it drains from the bottom. Then, allow the top two inches of soil to dry out completely before watering again.
The Bromeliad Difference: Unlike most plants, the pineapple's cup-like rosette (the center leaves) can hold water. Keep a small amount of water in the base, flushing it weekly to prevent stagnation and rot.
Pineapples are heavy feeders and need consistent nutrients to grow and potentially fruit.
The Mix: During the growing season (Spring through early Fall), feed every two to four weeks with a balanced liquid houseplant fertilizer.
Application: Apply the fertilizer directly to the soil, but also lightly mist or pour a highly diluted solution directly into the central rosette—the pineapple absorbs nutrients through its leaves, too!
If you're starting from a grocery store pineapple, here's the best way to prepare the crown:
Twist: Grasp the leafy crown firmly and twist it off the fruit.
Peel: Remove the bottom 1-2 inches of the small, lower leaves to expose the root nodules and allow the base to dry.
Cure: Let the crown sit out in a dry spot for 3 to 7 days until the base is completely dry and calloused over. This prevents rot.
Plant: Place the cured base directly into a pot of well-draining soil and water lightly. Keep it warm and in bright light. Roots should form in 6-8 weeks.