That's a question with no simple answer. It depends on many variables: the soil mix, the humidity in your home, the amount of light it gets, the time of the year, and even the type and size of the pot you are using.The safest advice we can give you is to get a moisture meter, a must-have tool that we recommend if you want to easily keep your plants happy and give them precisely the amount of water they need and, more importantly, when they need it.