The ones I have in the greenhouse get watered almost every day in the warmer months. This winter maybe only once a week. I have read they are susceptible to crown rot if they don't dry out between waterings. I have also read to try and keep them slanted so water does not collect in the crown.
Some of the ones I have came from a Florida dealer. The majority came from Davis Farms in California who is a wholesaler and requires a $100 minimum. It doesn't take much to get to that point. Both have had good looking plants but I prefer the Davis plants and supplies.