Rh. luteum
Flowering time:
end of May-beginning of June
Flowers: golden yellow, very fragrant
Leaves: deciduous, the leaves turn red-purple in autumn
Height: 1.5-3 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