The importance of proper watering cannot be stressed enough for your container garden plants. Container Gardens are exposed to wind and sun so they dry out quicker than plants in the ground. There are no exact rules about watering your container garden plants. You have to become acquainted with the needs of various garden plants. The best tip is to examine them daily and water the plant when the surface of the soil begins to look dry. Feeling the soil will also help you determine the moisture needs of your container garden. Or, take the easy way and invest in a water meter if you are not sure.