Rose of Sharon is actually a variety of hibiscus, which is native to Indian subcontinent and other Asian countries. Planting rose of sharon is possible in variety of zones as it is adaptable to multiple climates.
Blue Bird Rose of Sharon An incredibly beautiful shrub with an extraordinarily long flowering time! Saucer-shaped blooms with overlapping petals of azure-blue, accented by red-purple throats, are produced nonstop from midsummer to frost, opening 3-5" wide. Will form an open fan-shaped bush 6-8' tall and easily used for a screen or hedge. Ships in 4" pots. Zones 5-8 Hibiscus syriacus ‘Blue Bird’
Rose of Sharon... my favorite tree ever... We transplanted these from KY to NC and grew from a sprout to 8 ft tall. Require full sun, and NO care! Great for privacy. I'm going to transplant more for privacy along a bamboo fence in the front yard.