Brief summary
Modern Rose, polyantha "White Koster", Netherlands, introduced by D.A. Koster in 1929, Usually is white in color, globular bloom shape, double petal count, blooms 3 cm in size, repeat rebloom, has light fragrance, the bush shape can be spreading, 60 - 70 cm in height, suitable for USDA zone 5 from -29°C and above, moderate resistance to mildew.