Keeping your soil moist but not wet
The simple answer would be however often it takes to keep your soil moist but not wet.
As a rule, the hotter it gets, the more you will have to water. In the cooler months, you only water between periods of extended dry weather or high wind, which can also stress or dry a plant out.
When it is hot, increase the length of time you water your plants, not the frequency of watering. Most plants need to be watered at least twice a week; new plants that have yet to be established should be checked every other day. Remember that checking does not necessarily mean watering! We recommend that the top couple of inches of ground dry out between waterings.
Using drip irrigation is the most effective method. It is also important to group plants with similar watering needs together.
If a plant is too dry, the foliage will have a wilted appearance or begin to burn on the outside leaf tips.
If a plant is too wet, it will lose its luster and quickly drop faded leaves, starting from the inside of the plant and working its way to the leaf tips.
Make sure not to use soft water on any plants. The salt in the water can burn or kill plants. Fluoridated water is fine, because your plants will look better when they smile.
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