Description
Fallopia – Bilderdykia – Reynoutria –
There are about 7 species of invasive rhizomatous, climbing or scrambling, annuals and woody based perennials, in this genus. They occur in moist habitats in temperate regions in the Northern Hemisphere. They have simple, smooth edged, alternate, triangular or narrowly to broadly ovate leaves, In late summer, they bear large panicles of small,. Funnel shaped, whitish, greenish white, or pinkish white flowers. Climbing species are ideal for training on pergolas and deciduous tree and for covering unsightly structures.
Grow in any poor to moderately fertile, moist but well drained soil, in full sun or partial shade. Provide strong, durable supports, a vigorous specimen can pull down a small tree or weak support.
Prone to leaf miners.
F. japonica – Polygonum cuspidatum – Reynoutria japonica – Japanese Knotweed – This creeping or climbing rhizomatous perennial, often forming extensive colonies grows to 10′ feet high. It produces elliptic to broadly ovate leaves, to 6″ long. White flowers are borne in late summer to fall.
Zones 5-9
