Take this with a grain of salt since I live in the tropics where they grow like weeds. However, they don't do well if they don't have really good drainage in the rainy season. In a pot, I would err on the side of less water rather than more. Skip the fertilizer unless you have one that is specific for them and even then, use it sparingly. I have read that floride is a problem for them and that perlite may contain it, I don't know as most of the ones I see are in regular dirt and not fertilized. Just make sure that it doesn't sit in water and that the soil drains well. I think you can kill them with too much care easier than with too little. Hope this helps.
