'Jānis'

Flowers: dark violet-purple, with very dark, rough spots

Leaves: evergreen

Height: 1.9 m (in 20 years)

Width: 2.8 m (in 20 years)

Hardiness: good (-25°C)

Growing: In shade, in acidic (pH 4.5-5.5), moderately moist, loose, rich in humus and permeable soil