Jamaican Rosell species of flowering plant in the genus Hibiscus that is native to Africa and  India. In the 16th and early 17th centuries it was spread to the West Indies and Asia and eventually made it's way to the West. 
A Jamaican Roselle is is very large plant and needs plenty of room. Space 3-6 feet apart in rows of at least 5 feet apart. Roselle prefers well-draining fertile soil. Overly rich soil or extra fertilization leads to a very large plant with fewer calyces. A sunny spot is best for growing roselle successfully however in our Gulf Coast heat, it does well with afternoon shade. 
Be sure to provide support for Jamaican Roselle's heavy branches. It is common to use rebar as a support. 
While the leaves can be eaten like spinach, the most common use is a beverage made with the calyces