Ludwigia "Rubin"

Ruby Ludwigia

Aquarium suitability: yes
Usage: Accent (red), Background, Midground
Difficulty: easy
Growth: fast
See also: Ludwigia glandulosa , Ludwigia palustris "Super Red" , Ludwigia repens

Common names: 
  • Ruby Ludwigia

  • Ludwigia aff. glandulosa
  • Ludwigia repens 'Rubin'
  • Ludwigia sp. ''Weinrot''

Misapplied names: 
  • Ludwigia glandulosa
  • Ludwigia glandulosa 'Red'
  • Ludwigia glandiosa

Habit, plant type:

  • stem
Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Myrtales
Family: Onagraceae
Genus: Ludwigia


This strikingly-coloured dark red plant was imported by the Danish aquatic plant nursery Tropica under the name Ludwigia repens 'Rubin'. It is also known as Ludwigia sp. "wine red". Recent research showed that it is not a L. repens variety but a relative of L. glandulosa, and probably a hybrid. For this reason, it is also called Ludwigia aff. glandulosa (Kramer 2006; aff. = affinis = "related, close") or Ludwigia "Rubin" (Kasselmann 2010). Some nurseries erroneously carry the plant as L. glandulosa or "L. glandiosa" (distrinction from true L. glandulosa: see below).

The leaf form of Ludwigia "Rubin" is quite similar to that of L. repens, and its growth habit is also comparable. However, whereas L. repens always has oppsite leaves (2 leaves per node), the shoot parts of L. "Rubin" have opposite as well as alternate leaves (1 leaf per node) at irregular intervals. Ludwigia glandulos, which has a similar wine-red colour, always has alternate leaves, a narrower lanceolate leaf form as well as more strictly upright almost unramified submersed stems.

Like the more common L. repens, L. "Rubin" is easy to keep and does not pose any special demands on the conditions it is cultivated in. However, it only assumes its characteristic deep read colour under lots of light (0.5 watts per litre and over) and a good iron supply. Ludwigia "Rubin" throws many roots on its nodes, which can be removed without problems, though. The plant is a little susceptible when transported, but recovers easily from the damages caused given that it is provided with good growing conditions.

Propagation is as easy as for all stem plants. L. "Rubin" forms lateral shoots on a regular basis, which can be cut off and re-planted, as well as the top shoot.

Ludwigia "Rubin" is one of the darkest red plants, which makes it a true eyecatcher in any aquarium layout. A small group, positioned in the middle ground, with some green plants as a backdrop, will provide the onlooker with a beautiful focal point. Microsorum pteropus "Narrow Leaf" or Hygrophila balsamica used as neighbouring plants bring out its colours especially well.

References and further reading:
  1. follows
Light medium to high 
Temperature tolerance 6 to 32 °C
Optimum temperature 18 to 28 °C
Carbonate hardness 2 to 15 °dKH
pH value 5 to 7.5 
Carbon dioxide (CO2) 10 to 40 mg/l
Nitrate (NO3-) 10 to 50 mg/l
Phosphate (PO43-) 0.1 to 3 mg/l
Potassium (K+) 5 to 30 mg/l
Iron (Fe) 0.01 to 0.5 mg/l

Growth: fast

Propagation: Cuttings

Can grow emersed?: yes

Suited for outdoor cultivation / ponds: unknown

Winter hardiness: unknown

There is no detailled information for cultivating this plant yet.
Aquascaping: very colourful plant for accents

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TODO Ludwigia "Rubin" is also known as Ruby Ludwigia. TODO

Wasserpflanzen sind ein fester Bestandteil der meisten Aquarien. Beim Aquascaping, dem Naturaquarium, Biotop-Aquarium oder dem Gesellschaftsaquarium sind Wasserpflanzen nicht nur für die Wasserqualität entscheidend, sondern sorgen auch stets für eine optische Aufwertung des Aquariums.