Sieboldii is a deciduous climber, with mid-green foliage and creamy-white flowers, 7-10cm in diameter, with a large central violet-purple boss, are borne form mid-summer to early autumn.
Plant in a moisture-retentive, well-drained soil, in a warm, sheltered position. Plant with the crown 5-8cm deep to encourage new shoots to grow from below ground level. Can be grown in containers, at least 45cm deep and wide, in a soil-based potting compost; best outdoors in mild localities only, ideal for conservatory cultivation.
Ultimate height: 1.5-2.5 metres
Ultimate spread: 1-1.5 metres
Time to ultimate height: 2-5 years
* Please note that images are representative of the fully grown plant, and will require additional time and care to reach the pictured form.