Acorus gramineus 'Pusillus'

Dwarf Sweet Flag

Aquarium suitability: yes
Usage: Epiphyte (growing on hardscape), Midground, Nano tanks
Difficulty: easy
Growth: very slow
See also: Acorus gramineus

Common names: 
  • Dwarf Sweet Flag

  • Acorus gramineus var. pusillus

Trader names [?]: 
  • Acorus pusillus
  • Acorus pussilus

Habit, plant type:

  • rhizome or creeping stem
  • epiphyte or epilith
Botanical name [?]: Ácorus gramíneus Solander

Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Acorales
Family: Acoraceae
Genus: Acorus


'Pusillus' is a dwarf form of the Grass-leaf sweet flag or Japanese rush, Acorus gramineus. This cultivated form has also been ranked as a variety, Acorus gramineus var. pusillus. It is in the aquarium trade for a long time, but it is mostly regarded as of limited value or not at all suitable as aquarium plant. However it can very well be grown permanently submerged, at least when it is attached to hard materials (see Schulz 2018).

Acorus gramineus 'Pusillus' is often not taller than 10 cm, however it may reach a hight of about 15 cm.

- To be continued -

References and further reading:
  1. Schulz, Kathrin Lisa (2018): Erfahrungen mit der Kultur des Graskalmus, Acorus gramineus Solander ex Aiton (1789). – Aqua Planta 1/2018
Light low to high 
Temperature tolerance 4 to 28 °C
Optimum temperature 18 to 23 °C

Growth: very slow

Propagation: Rhizomteilung, Splitting, cutting off daughter plants

Suited for outdoor cultivation / ponds: yes

Winter hardiness: half-hardy in Germany

There is no detailled information for cultivating this plant yet.
There are no further design information for this plant yet.
This plant is not on a stocklist at this moment.
This aquatic plant is not listed in a tank yet.
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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.