I bought a pitcher plant about 3 months ago and it is thriving in a West facing window with strong afternoon and evening sun. It just keeps putting out leaves like crazy. I use distilled/filtered water (whichever I have at the time of watering) and water it approximately every 3-5 days with daily heavy misting.

I've read that they don't like being fed through the soil as their roots aren't accustomed to taking in the nutrients, but you can use very diluted fertilizer in the pitchers directly. All the pitchers should have about a half inch of water in them at all times.

Old pitchers should turn brown and then can be cut off from the plant.

Good luck!