Samolus valerandi

Water pimpernel

Aquarium suitability: yes
Usage: Midground, Nano tanks, Foreground, group
Difficulty: medium
Growth: slow

Height: 10 - 15 cm
Width: 10 - 20 cm

Availability [?]: 
  • frequently available commercially

Common names: 
  • Water pimpernel
  • Thin leaf brookweed
  • Water rose

  • Samolus floribundus Kunth
  • Samolus parviflorus Raf.

Habit, plant type:

  • stem
  • rosette
Botanical name [?]: Sámolus valerándi L.

Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Ericales
Family: Primulaceae
Genus: Samolus


Seaside rivuletweed, or Samolus valerandi, is a small bog plant distributed in almost all the world. It prefers wet ground on and in fresh and brackish water. In Central Europe it can be found in brackish reeds near the coast, among others.

This plant has around 15 cm high light green spreading leaf rosettes. The leaves are oblanceolate to obovate and look a little like lamb's lettuce (Valerianella). The leaf tip is round, the margin runs down along the leaf stalk.
The flower stalks appear on emersed plants, grow to a height of 10 to 50 cm and carry alternate leaves that grow smaller to the top. They bring forth numerous tiny inconspicuous white flowers. The fruit are round capsules which have five caps that open and release many small seeds.

To be continued...

References and further reading:
  1. Kasselmann, C. (2010): Aquarienpflanzen. 3rd edition (German). - DATZ Aquarienbuch, Ulmer Verlag, Stuttgart: p. 514.
Light medium to high 
Temperature tolerance 4 to 35 °C
Optimum temperature 22 to 26 °C
Carbonate hardness 7 to 30 °dKH
pH value 6 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: slow

Propagation: Seeds, Splitting, cutting off daughter plants

Can grow emersed?: yes

Suited for outdoor cultivation / ponds: yes

Winter hardiness: hardy in Germany

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TODO Samolus valerandi is also known as Water pimpernel, Thin leaf brookweed and Water rose. 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.