Rosa 'KORbin' (Iceberg)

Rosa 'KORbin' (Iceberg) was bred by Reimer Kordes of Germany and is a cross between Rosa 'Robin Hood' and R. 'Virgo'. It is a floribunda rose.

In our area, we have noticed Rosa 'KORbin' (Iceberg) facing problems from black spot (Diplocarpon rosae), a common fungal problem that affects roses. We have observed that Rosa 'KORbin' (Iceberg) still flowers well, despite black spot, as it is almost constantly in flower from spring until frost. However, due to its problems with black spot, it is often losing leaves and can appear sparse, making the overall appearance of the rose unattractive.

Black spot can cause leaves to develop black spots with blurred edges, yellowing leaves, and eventually partial or entire defoliation. While black spot is rarely fatal, it can weaken the rose by reducing its leaves and therefore its ability to photosynthesize. Although similar in appearance to cercospora leaf spot, black spot can be distinguished by the less defined and more feathered edges of the spots. As with many fungal problems, issues are generally worse in areas with high humidity. Black spot can be treated chemically.