Tropical Hibiscus, Hibiscus rosa-sinensis: Tropical hibiscus grows permanently in the landscape in warmer U.S. Dept of Agriculture zones 9 through 11, unless they are taken indoors in winter. Outdoors, one freeze – below 25 degrees Fahrenheit – will kill them A hibiscus flower usually has five petals (a single hibiscus).
Recently I purchased 4 new tropical hibiscus. Several weeks ago I shared my two beautiful new yellow single hibiscus plants. My two red hibiscus were $7.98 each which is a wonderful deal. Today we’ll look at my new single hibiscus in red and compare it to my older established double hibiscus. (Double hibiscus have multiple layers of petals for a ruffled look.)