East facing, north facing, south facing, west facing
Position in border:
Middle
Soil
Acidic / Chalky / Alkaline / Clay / Heavy / Moist
Alpine knotweed, Persicaria alpina, is a substantial herbaceous perennial with pointed green leaves topped by fluffy flower plumes from midsummer and into autumn. Don't be put off by its common name; Persicaria alpina is easy to grow, but not thuggish or invasive, although it does resemble Japanese knotweed.
Persicaria alpina enjoys growing in moist soil, so it's a great choice for growing near ponds, allowing the water to catch its reflection.
For best results, grow Persicaria alpina in full sun or partial shade in moist, well-drained soil, sheltered from strong winds. Cut back the foliage to the base of the plant after it has been hit by the first frosts.
Plant calendar
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sow
yes
yes
yes
Plant
yes
yes
yes
Flowers
yes
yes
yes
Divide
yes
yes
yes
yes
yes
yes
Cut back
yes
yes
Persicaria and wildlife
Persicaria has no particular known value to wildlife in the UK.
