The basic tips are water your container when the top of the soil is dry to the touch.  Water until some liquid comes out of the drainage hole in the bottom of the pot.  Be careful not to over water when the temperatures are cool.  Keeping soil too wet will cause disease problems.  Large pots are especially vulnerable to staying too wet because of their large soil volume.  All of that soil makes things easier in hot weather, but it can make things a bit more difficult in cooler weather.