RobustaRobusta blooms in profusion with eye catching, single, red, 4 blooms with 5 8 petals. Her clusters are produced in abundance on a vigorous, continually blooming, upright bush with beautiful, medium green, glossy, leathery foliage. The thick canes are covered with nail like prickles which makes Robusta an excellent fence, hedge, or impenetrable barrier. She thrives in colder zones and needs little care to thrive and grow.