Smilax sieboldii

Smilax sieboldii is a climber that keeps its leaves year-round. It belongs to the Smilacaceae family. Its native range spans eastern China and temperate East Asia. It grows in forests, thickets, and on grassy slopes. These sites range from near sea level into the mountains. Most records reach about 5,900 feet [1,800 metres] above sea level. Some reach about 8,200 feet [2,500 metres]. It is not native to Britain or Ireland.

This climber grows to about 6.6 feet [2 metres] tall. It suits gardens that need plants to grow upwards. The supplied species account does not describe its leaf shape. It gives no stem details or mature width for garden plants. The RHS page covers the genus, not this species. We cannot trust those broad traits to fill these gaps for Smilax sieboldii.

Flowers bloom from June to July, and seeds ripen in October. Each plant bears either male or female flowers. The term for this is dioecious: each plant has one sex. A lone plant cannot make seed with its own pollen. Grow both sexes if you aim to produce seed. The evidence gives no flower colour or fruit details. It does not name the animals that pollinate this species.

Plants For A Future says it grows in most soils. These include sand, loam, and clay. It accepts slightly acid, neutral, and slightly alkaline soil. Choose moist soil in sun or part shade. Woodland edges suit the uses the source lists. So do sites where light filters through leaves. Its climbing stems keep their leaves year-round in these settings. The evidence gives no hardiness zone or lowest safe winter heat level. Its roots in a temperate region do not prove a safe winter limit.

You can eat the leaves and young shoots when cooked. Plants For A Future rates its food value one out of five. The same source lists no known hazards for this species. This does not prove it safe for pets or every use. It rates both medicinal and other uses zero out of five. Its notes on medicinal use are unclear. They do not support claims that it can treat illness. The source does not flag a risk of becoming a weed. The supplied evidence names no pests or diseases for this species.