Iceberg roses require several hours of sunlight every day, and the crowns should be covered with mulch and straw. The soil should be mounded 6 to 8 inches above the crowns to protect them from extreme cold.
Iceberg roses are said to come from Germany originally. Their brilliant double white blooms give off a rather sweet, almost honey-like fragrance. Although these flowers require a fair amount of maintenance, they bloom profusely and are very strong. These roses are ideal for growing as hedges and low borders. Because they grow very densely, they also are good for planting in pots.
It is important that iceberg roses are grown where there is a great deal of sunlight. In fact, they need between 4 and 6 hours of sunlight daily for optimal conditions, and they also must have adequate drainage. Pruning them helps promote new growth.