Source: Wikimedia Commons
Star rotala
AdvancedPogostemon stellatus
A stem plant of the mint family with long narrow leaves in dense whorls, stacked like stars. Leaner nutrients bring out purple to orange colours. It needs strong light and CO2 and can stall suddenly even in good conditions, so it suits experienced keepers.
About
Pogostemon stellatus (Lamiaceae) grows in marshes from East and South-East Asia to northern Australia and is also known in the hobby by its former name Eusteralis stellata. The annual Mizunekonoo of Japanese marshes and rice fields is treated under the same name. With such a wide range it varies greatly in the wild, and traded plants differ by origin. Its hallmark is long narrow leaves in dense whorls, stacked star-like along the stem; the whorls are 6–14 cm across and stems reach 20–60 cm. High nitrate and phosphate keep it green, while leaner levels bring vivid purple to orange. It also indicates trace-element and iron supply: shortages turn the leaves yellow, in extreme cases white. It is difficult, needing strong light and constant CO2; without enough light it quickly drops lower leaves. Stability matters more than exact nutrient levels, since sudden changes cripple the growing tip and trigger side shoots, and growth can stop abruptly even in good conditions. Shop plants are often low, compact emersed-grown stock that reveals its full form only after planting. It produces many side shoots, which make propagation easy. It is sold by specialist shops in Japan.
Size of the Star rotala
The Star rotala grows to Stems 20–60 cm tall, whorls 6–14 cm across.
Temperature & humidity for the Star rotala
The ideal temperature for the Star rotala is 24〜28℃.
Basic Info
Origin
East and South-East Asia to northern Australia
Lifespan
Maintained in aquaria by replanting cuttings
Size
Stems 20–60 cm tall, whorls 6–14 cm across
Temperature
24〜28℃
Watering & Fertilizer
Needs constant CO2 and stable fertilisation
Growing Tips
Lighting
Strong light is essential; without it the lower leaves drop quickly.
CO2 & Fertilizer
Add CO2 constantly and keep nitrate, phosphate and trace elements stable. Yellow to white leaves indicate iron or trace-element shortage.
Water Temperature & Quality
Optimum 24–28°C at slightly acidic pH 5–7.
Substrate & Attachment
Plant as a midground focal point or in the background, spaced to allow for the wide whorls.
Trimming & Propagation
Side shoots root easily; tops can be replanted in place to renew the group.
Cautions
Growth may stall suddenly even in good conditions, and it dislikes abrupt changes. Never release plants into the wild.
Star rotala FAQ
QWhat is the growing difficulty level for Star rotala?
Advanced. A variety suitable for advanced growers. Requires advanced cultivation techniques and specialized equipment, with careful environmental adjustments needed.
QWhat is the ideal temperature for Star rotala?
The ideal temperature for Star rotala is 24〜28℃. Avoid sudden temperature changes and maintain a stable environment.
QHow large does Star rotala get?
The mature size of Star rotala is Stems 20–60 cm tall, whorls 6–14 cm across. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Star rotala?
Star rotala: watering & fertilizer — Needs constant CO2 and stable fertilisation. Aim for appropriate frequency and amount.
QWhat is the typical price for Star rotala?
The price of Star rotala varies significantly by variety, characteristics, size, and lineage. Please check GrowerDirect's price guide for the latest market information.
Last updated: September 23, 2026
References & Sources
Edited & verified by: GrowerDirect Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Taxonomy & Authority
Regulations & Conservation Status
Not listed in CITES (no match in Species+). Not regulated under Japan's Invasive Alien Species Act or Species Conservation Act. Never dump aquatic plants into rivers, ponds or ditches, or flush them away with tank water. Drain unwanted plants and trimmings and dispose of them as household waste.
Sources: Species+ (CITES listing check) / Ministry of the Environment: list of Invasive Alien Species (Invasive Alien Species Act)
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
Find listings for this species
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