Water hanging plants only when the soil is dry. To test the soil, insert a finger 1 inch into the soil, and see if it is moist. Alternatively, poke a garden tool such as a spade into the soil, and check to see if the soil is moist 6-inches deep.
How often hanging plants need to be watered depends on several things: the type of plant, weather, sun exposure and soil. Some plants handle being watered more often, while others are killed by overwatering. Visibly inspect the soil before adding water.
If the pot is exposed to sun much of the time, it dries out more quickly. A hanging pot kept in the shade does not dry out as fast. The type of soil matters, as some soils drain quickly, while others hold water longer.