Rh. viscosum
Flowering time:
end of June-beginning of July
Flowers: white, with a sweet fragrance
Leaves: deciduous
Height: 1.5-2 m
Width:
Hardiness: very good (-30°C)
Growing: In sun or partial shade, in acidic (pH 4.5-5.5), moderately moist, loose, rich in humus and permeable soil