Persicaria virginiana var. filiformis

RHS Plant Profile
thread-like Virginia knotweed

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Synonyms

Persicaria virginiana 'Filiformis'

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A clump-forming, deciduous herbaceous perennial to around 60cm with bright green foliage with burgundy-red 'V'-shaped markings. Upright red stems produce sprays of small red flowers in late summer. Seeds freely

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Botanical Details

Family
Polygonaceae
Native to GB/Ireland
No
Genus
Persicaria can be annuals, herbaceous or evergreen perennials or sub-shrubs with simple leaves and small bell-shaped white or pink flowers in long-lasting spikes or panicles
Name Status
Correct

How to Grow

Cultivation

Grow in moisture-retentive but well-drained soil in full sun or partial shade

Propagation

Propagate by division in spring or autumn. Deadhead after flowering to avoid spread as seeds freely

Pruning

No pruning required

Pests

Generally pest-free but may be susceptible to slugs and snails

Diseases

Generally disease-free