There are over a 200 kinds of hibiscus. They grow all over world. They have been associated with Goddess as Rose of Sharon variety. They have a long history. Not surprising as they are beautiful and used for many medicinal purposes.
If your hibiscus has dull medium green heart shaped leaves, dinner plate sized white, pink or red flowers with HUGE, bomb shaped buds (2-4" in length!), it is a perennial, hardy hibiscus.
Hardy hibiscus need very little care over winter, they are root hardy to about zone 5 with no protection. They die to ground each year. Hibiscus (Hibiscus sabdariffa), also known as roselle, is a flowering shrub in plant family of Malvaceae and is commonly used species of hibiscus for tea. The calyces are used to make cold and hot beverages in many of world's tropical and subtropical countries. The calyces (or calyxes) are used which are outer portion of flower bud. The calyces are often referred to as hibiscus flowers in recipes and tea blends. It is also a great contribution to popular rosehip tea giving it a lemony flavor and lovely red color. The aroma and taste of Hibiscus is slightly of berry-like aroma. It has a well balanced, tart and astringent flavor.
Hibiscus were once called shoe-black, "indicating use of its flowers by tropical bootblacks, to polish shoes." (Taylor's Encyclopedia of Gardening, 1961) This was single reliable reference to this use author could discover. Nor could this author allow such a claim to stand without attempting experimentation.One red flower (five petals removed from calyx, stamens, and pistil) did one shoe. The red petals became liquefied and slimy under pressure against leather. The liquid dried and could be buffed within minutes. The right shoe of an old pair of black business shoes now appears much shinier than its 'sinister' counterpart. The tips of thumb, index, and middle finger of my right hand were also a dark purple until liquid detergent and a brush were applied. Medicinal Uses
Medicinally, leaves are emollient, and are much used in Guinea as a diuretic, refrigerant, and sedative; fruits are antiscorbutic; leaves, seeds, and ripe calyces are diuretic and antiscorbutic; and succulent calyx, boiled in water, is used as a drink in bilious attacks; leaves and powdered seeds are eaten in West Africa. Philippines use bitter root as an aperitive and tonic. Angolans use mucilaginous leaves as an emollient and as a soothing cough remedy.