Bacopa monnieri

Water hyssop

Aquarium suitability: yes
Usage: Background, Midground, Street (Dutch style)
Difficulty: very easy
Growth: medium
Range and localities: 

Tropical and subtropical regions worldwide

Availability [?]: 
  • frequently available commercially
  • frequently available from other aquarists

Common names: 
  • Water hyssop

Habit, plant type:

  • stem
Botanical name [?]: Bacópa monníeri (L.) Wettst.

Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Lamiales
Family: Plantaginaceae
Genus: Bacopa


Bacopa monnieri, or water hyssop, is distributed in many subtropic and tropical regions of the earth, growing on the shores of lakes, riversides and pond edges. It is even found in slightly saline locations near the seashore.
Depending on the water height respectively the season (dry or rainy), wild B. monnieri grows emersed, with a creeping habit and submersed with upright stems. Its emersed form develops beautiful light pink flowers in the leaf axils.
Bacopa monnieri is an Ayurvedic medicinal plant, known under the name of "brahmi" - a name for many medinical herbs, though. In Vietnamese cuisine, it is used as a vegetable.

Bacopa monnieri has been long known in aquaristics and is one of the most uncomplicated and widespread plants. Due to a mix-up, it has been erroneously sold as a novelty plant under the name of Hedyotis salzmannii. However, the real Hedyotis salzmannii (please refer to its plant profile) has quite a different leaf and flower form.

Typical for Bacopa monnieri are its thick, fleshy, light-green oblanceaolate leaves, i.e. they are widest near the leaf tip. The leaf tip itself is rounded.
This species is quite variable, and there are several forms in cultivation. One of them has a distinctly serrated edge, the leaves of another one have a round form.

Bacopa monnieri has little requirements regarding its growing conditions, however, it needs sufficient light. Optimal are 0.5 watts per litre or more. If the light is too low, the lower part of the plant tends to rot. Fertilising with CO2 is beneficial, but not a must. Besides stunted growth, B. monnieri does not tend to show dramatic nutrient deficiency symptoms. In aquaria with a high concentration of CO2 and a high light intensity the keeper should make sure that sufficient nitrate (around 5 mg per litre) and phosphate (around 0.25 to 0.5 mg/l) as well as a regular iron and micronutrient supply to guarantee faster and more robust growth.
This species is also said to be cultivable in brackish water of low salinity, experiences regarding the cultivation of Bacopa monnieri in brackish water might be interesting.
It is also easy to cultivate emersed. The substrate (e.g. normal potting soil) does not even have to be wet, just moist. During the warm months, B. monnieri can be kept outside, e.g. on the edge of a pond or in mobile water gardens, where the flowering shoots hanging down from the edges may have an especially attractive effect.

This robust stem plant maintains a vertical habit even under strong light when cultivated submersed. When it reaches the water surface, its emersed growth is still upright. Bacopa monnieri produces "pseudo runners" on the basis, which you can simply leave there or cut off and replant. For propagation, you can also cut off lateral shoots, which you replant.

With its light green colour and its special leaf form, Bacopa monnieri is a great accent plant for the back- and the middleground of aquaria.

Light medium to high 
Temperature tolerance 15 to 30 °C
Optimum temperature 18 to 28 °C
Carbonate hardness 2 to 30 °dKH
pH value 5 to 9 
Carbon dioxide (CO2) 5 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: medium

Propagation: Cuttings

Can grow emersed?: yes

Suited for outdoor cultivation / ponds: unknown

Winter hardiness: not hardy in Germany

There is no detailled information for cultivating this plant yet.
light green

There are no images in this gallery.
You can embed this entry directly into another web site or forum. Just copy and paste the following code:

Embed as HTML code

<a href="" target="_blank"><img alt="Bacopa monnieri" title="Bacopa monnieri" src="" /></a>

Embed as BB code


Embed in Flogrow Forum

[widget=aquaticplants/bacopa-monnieri]Bacopa monnieri[/widget]


There are no reviews so far. Do you want to write the first one?
TODO Bacopa monnieri is also known as Water hyssop. 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.