Sunset®: 9,12-13,15-26
USDA: 9b-10
Frost Tolerance: Semi-tender in Phoenix, can use protection on coldest nights
Sun Exposure: Full sun
Growth Habits: Bush to 15 feet (4.5 m)
Watering Needs: Regular water
Propagation: Heeled cuttings under mist, low branch layering, seeds
Most hibiscus in Phoenix suffer from some frost damage in winter but recover in spring.
Blooming Habits:
The flowers last only a day or two, but they are produced in abundance most of the year.
Culture:
The Hibiscus request frequent deep watering, but good drainage. It is sensitive to root rot if the ground stays soaked. Check regularly for aphids and mealy bugs, and fertilize.
Propagation:
The success of cuttings depends heavily on the variety. Even for easy varieties, the cuttings might takes 2 or 3 months to start growing, showing that their have developed a root system. Be patient. Use layering or air layering for the more difficult varieties.
Graft in spring using whip grafting or side grafting.
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