Supersonic Series. These new guineas offer a wide selection of flower colors over bronze foliage. The flower size is larger than on other impatiens. While impatiens do best in the shade, new guineas do need some light to bloom properly. They should avoid the hot, afternoon sun, especially if the soil is dry. New Guineas are pretty forgiving, though, so if they are drooping from too much sun and too little water, give them a drink and they should bounce back. Keep soil moist but not too wet.