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Rotala wallichii

°C
°dKH
Aquarium suitability: yes
Usage: Accent (red), Background, Midground, Nano tanks
Difficulty: difficult
Growth: fast

Habit, plant type:

  • stem
Botanical name [?]: Rotála wallíchii (Hook. f.) Koehne

Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Myrtales
Family: Lythraceae
Genus: Rotala

Description: 

Rotala wallichii is an elegant stem plant originating from soft, slightly acidic waters in South-Eastern Asia. Its inflorescence has bright purple flowers. Even though it is not quite easy in cultivation it is a highly popular plant.

R. wallichii needs lots of light, CO2 fertilisation and a well-balanced supply of nutrients to grow well. The light intensity should at least be 0.5 watts per litre in order for it to attain intensive colours and to support growth. A good supply of CO2, either with bio CO2 or a system using pressure bottles is indispensable. Rotala wallichii grows best if the nitrate level never falls to zero but does not exceed 10 to 15 mg per litre either. A high phosphate content of 1-2 mg per litre is preferred, as well as a good supply of iron and micronutrients.
Under optimal growth conditions this plant rewards its keeper with stunning colours, ranging from intense pink over orange to deep red foliage with a diameter of 2 cm and more.

This Rotala species forms opulent finely-structured groups growing upwards. Those plant parts closest to the surface develop the most intensive colours and throw a large number of lateral shoots. If R. wallichii grows too large for your tank design you can just cut off the uppermost part and re-plant it in the substrate. Propagation is done by cuttings of top and lateral shoots. They grow new roots very fast if re-planted in the substrate and start growing again.

Colourful R. wallichii is used in Nature Aquaria and in Dutch-style tanks. It is a great red accent plant for the middle- or background of an aquarium. In order to get the best effect, three to five stems should be planted at a time so they grow to form beautifully dense groups.

Light medium to high 
Temperature tolerance 15 to 30 °C
Optimum temperature 24 to 28 °C
Carbonate hardness 0 to 12 °dKH
pH value 5 to 7 
Carbon dioxide (CO2) 20 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: fine-leaved, very colourful plant for accents

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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.