'Iceberg' is a vigorous, rounded, deciduous shrub with serrated, glossy, light green leaves and large clusters of double white flowers in summer and autumn. Plant in moist but free-draining or free-draining soil, preferably in full sun. Avoid planting in sites that have previously been used for growing roses. Approx. Height x Spread (cm): 80 x 60 after 2-5 years.