Persicaria sp. 'Kawagoeanum'

(4 ratings)

Narrow-leaved red stem plant
Orange-red to pink hues
Loosely upright ramified growth habit

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Middle ground

Background

Accent (color)

Semi-emersed (open tanks)

Aquarium Plant Characteristics

Difficulty Medium

Growth Fast

Light Medium

Maximum water hardness for this aquarium plant in the aquarium

Water hardness max. Medium

Recommended care height 15-40 cm

CO2 Yes

Discus suitable Yes

Variation

Pot - Ø 5 cm (out of stock)

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Description

Persicaria sp. 'Kawagoeanum' is a narrow-leaved, fast-growing knotweed from Asia. The plant is also commercially available as Persicaria sp. 'Red', Polygonum sp. 'Kawagoneum' and incorrectly as Persicaria sp. 'Sao Paulo'. Its species affiliation is still unclear. Many knotweed species occur amphibiously along and in water bodies and in alluvial soil, often on nutrient-rich mud. Under water, Persicaria sp. "Kawagoeanum" forms splendid orange-red to pink hues in good lighting. The leaves, which resemble willow leaves in shape, grow to about 8 to 12 cm long and 0.6 to 1 cm wide. In the terrestrial form the leaves are rather green in colour.

Like other Persicaria species, "Kawagoeanum" prefers a lot of light and above all a good macro- and micronutrient supply, also via the substrate. The addition of CO₂ is beneficial. The shoots grow upright and branch moderately. The head shoots look most beautiful. Stems that have become long tend to become bare at the bottom and form many water roots. Shoots that have been cut back often only sprout weakly. If the shoots have become unsightly, they should be removed and the shoot tips replanted as cuttings.
If you do not cut back the shoots, they will grow out of the water and come into flower. The emersed culture is easy on moist, nutrient-rich soil. The older shoot sections lay down and take root at the nodes.

Persicaria sp. "Kawagoeanum" works best in the aquarium as a solitary group, no more than 30 - 40 cm high, in the middle ground, and with its beautiful light orange-red tones it forms a colour accent that contrasts especially with light green plants. As an emersed, flowering plant in open tanks, paludariums and wabi kusa, this knotweed forms a "scrub" with its own wild charm.

Persicaria (or Polygonum) sp. 'Kawagoeanum' (sometimes also called Polygonum sp. 'Pink') is a relatively new aquarium plant. It is still not quite clear which species it belongs to, it could be Persicaria kawagoeana (= Polygonum kawagoeanum) from East Asia, though. Like most knotweeds, it inhabits wet locations like bogs, ditches or riverbanks. It grows above as well as below the waterline.
Accordingly, Persicaria sp. 'Kawagoeanum' can be cultivated emersed as well as submersed. It is not regularly found in pet stores or online shops, and is usually more readily available from other hobbyists.

P. sp. 'Kawagoeanum' is often mistaken for Persicaria (Polygonum) sp. 'Sao Paulo', and it has been in trade under that erroneous name, too.
For differentiation, please see the description of Persicaria sp. 'Sao Paulo'.

The cultivation of P. sp. 'Kawagoeanum' is not especially difficult if its basic requirements are met. It may not be a suitable plant for low-tech aquaria, however, it is still useful for most aquarists. Strong light from metal halide lamps, compact or T5 lamps is recommendable, as this plant will only then develop a highly intensive pink-orange colour. Strong light will also reduce its (totally normal) tendency to lose its lowermost leaves.

High levels of CO2, phosphate and iron as well as a light colour temperature of 6500 to 8000 Kelvin also contribute to an intensive colour.
Furthermore, this plant does not tend to have growth problems. Emersed cultivation will lead to a significantly increased growth rate even though it may not grow under optimal conditions. Under intensive artificial light or under sunlight, the leaves will develop a rather attractive V-shaped brown spot on their upper side (comparable to spotted lady's thumb, a plant frequently found in Europe).

In contrast to other knotweed species used as aquarium plants, the growth habit of P. sp. 'Kawagoeanum' is not strictly upright. Instead, it ramifies at short intervals and thus forms a dense, easy-to-maintain bush. This makes it a better plant for Japanese-style Nature Aquarium layouts than for carefully trimmed Dutch tanks.
Considering its tendency to lose its lowermost leaves, it makes a lot of sense to hide these parts of the stems with driftwood or middleground plants.
The optics of P. sp. 'Kawagoeanum' and Cyperus helferi ideally complement each other, and both are great background plants for medium and large aquaria.

Family	Polygonaceae
Genus	Persicaria
Difficulty	medium
Usage	Accent (red), Semi-emersed plant for open tanks, Background, Midground
Aquascaping	very colourful plant for accents
Growth	fast
pH value	5 - 7
Temperature tolerance	18 - 30°C
Carbonate hardness	0 - 14°dKH
General hardness	0 - 30°dGH
Propagation	Cuttings
Can grow emersed?	yes
Source	Flowgrow

Family

Polygonaceae

Genus

Persicaria

Difficulty

medium

Usage

Accent (red), Semi-emersed plant for open tanks, Background, Midground

Aquascaping

very colourful plant for accents

Growth

fast

pH value

5 - 7

Temperature tolerance

18 - 30°C

Carbonate hardness

0 - 14°dKH

General hardness

0 - 30°dGH

Propagation

Cuttings

Can grow emersed?

yes

Source

Flowgrow

How many plants do I need?

General information

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Customer reviews

This item has been rated 4.8 out of 5 stars
4 Reviews

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5 Stars(3)
4 Stars(1)
3 Stars(0)
2 Stars(0)
1 Star(0)

Claudia W.

Really great

7th April 2016

Persicaria sp. 'Kawagoeanum' - Pot

Here you actually get what you see in the pictures. Tall, strong, beautiful plants that look, once planted, as if they had been there for weeks.

Translated from German

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Ganz toll

Hier bekommt man tatsächlich, was man auf den Bildern sieht. Höhe, kräftige, schöne Pflanzen, die nach dem Einsetzen aussehen, als wären sie schon Wochen lang da.