Rhododendron kiusianum ( Murasaki Shikibu Kyushu Azalea )
Dense , twiggy , dwarf , semi - evergreen shrub that is native to the mountaintops of Kyushu Island , Japan . R. kiusianum has also been love as R. indicum amoenum and R. obtusum f. japonicum . Hardy to 0 degrees F. Leaves are small-scale , obovate , benighted green , 1/4 to 3/4 inch long . bloom are small , view as in truss of 2 to 3 per cluster , and wear from mid to late springiness ....