How often to water anything depends on first-hand powers of observation (or first-finger, if not hand). Actually poke your finger into the soil to gauge what’s going on…and I mean into it, like an inch or two, not just the very surface, which can be misleading. It also depends on how sunny the spot is, what the temperature is, how windy it has been, and whether it’s dry or humid. So very variable week to week. Plus the plants grow, make a larger root system, which in the confines of a pot can sometimes mean they are outgrowing it and need more-frequent watering than if they were in larger quarters. And on and on. So like I said, stick a finger in (BEFORE the plant wilts, please). Get to learn the feel of soil that’s "evenly moist" versus just watered versus dry and in need of a drink. (Hopefully you don’t wait long enough to find out what bone dry is like.) Hanging baskets and other smallish planters can need watering once or more daily in hot summer conditions, particularly in sun. So be especially alert about those geraniums…check every day. Also be sure to water thoroughly, until water streams through the bottom (I like to top up the pot three times, to fully soak all the soil).