Proper watering is one of those mysteries that often seems to elude novice gardeners. It can seem like a constant battle figuring out whether the plants are under- or over-watered.
While each plant has slightly different watering requirements, remember that as a general rule, plants grown in containers dry out faster than plants in a traditional outdoor garden.
You should always use room temperature water and be sure to add enough that water seeps out of the drain holes in the bottom of the container. You can use your finger or a moisture meter to check the moisture level of the soil.
You can also look at the plants to determine whether they are under- or over-watered.