Answer: It depends upon your system and the timer you have. You may need to invest in a new timer, one that will control multiple systems so that you can water only parts of your yard as needed. A 2 or 3 system timer will allow you to split things into zones. Of course, you'll need to tag into the main line that feeds water to your hibiscus and isolate those into a single zone. Why not talk to a staff member at your local Home Depot? Helpful folks there can help you determine the best course of action for the type of system you have installed (jot down the name and model of your current timer - perhaps you can make a simple addition rather than replacing it). Best wishes with your landscape.
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