Swamp smartweed

Photo: Gordon Leppig & Andrea J. Pickart, Public domain, via Wikimedia Commons

Stem plant · Polygonaceae

Swamp smartweed

Persicaria hydropiperoides (Michx.) Small

mediumGrowth: fast

—

Height in the aquarium

medium to high

Light

medium

CO₂ needs

23–27 °C

Ideal temperature

Water parameters

Understand these values
pH5 – 7
49
Carbonate hardness (KH)0 – 14°
0°25°
Temperature18 – 30°Cideal 23–27°C
0°C35°C
Position
background, midground
Propagation
cuttings
Uses
open-top tank
Grows emersed
yes

In the wild

Overview

This American knotweed grows very upright and keeps fairly short internodes. Its subdued green can set off neighbouring red plants. In good conditions the leaves become very wavy. A dense group in the midground or background has more impact than a single stem.

Scientific name
Persicaria hydropiperoides (Michx.) Small
Classification
Caryophyllales › Polygonaceae
IUCN Red List
Least concern (LC)

Natural habitat

North America

Observations (GBIF) and localities Native countries Introduced in Rivers and lakes

Native countries
Introduced by people

Outside its native range, in 5 countries:

An aquarium plant must never reach the wild: throwing away cuttings or emptying a tank into a stream can be enough to establish it.

Countries: Kew World Checklist of Vascular Plants (WCVP). Dots: GBIF observations in the native countries.

In the aquarium

Growing in the aquarium

It can survive in low light but becomes more attractive with strong light and good feeding. Provide an aquarium spacious enough for the group of stems. Cuttings are used to fill out the planting. Its habit stays upright: do not expect a creeping plant even when it gets a lot of light.

Sources:Flowgrow GBIF POWO (Kew) · Base map: Natural Earth

Swamp smartweed · Aquarius