Source: Wikimedia Commons
Hornwort
BeginnerCeratophyllum demersum
A rootless floating plant. Extremely hardy with high water purification, ideal for beginners.
About
Myriophyllum is a genus of aquatic plants in the family Haloragaceae, widely distributed across temperate to tropical lakes and rivers on every continent. Commonly called water milfoil, the genus is characterized by whorled leaves intricately pinnated into hair-like segments, producing a feathery, plume-like appearance that sways gracefully in aquarium water flow. Multiple species are traded for aquarium use, most notably M. mattogrossense and M. tuberculatum, which vary in leaf color from green to red and in cultivation difficulty. Some species have a long history in goldfish aquaria due to their tolerance of alkaline, hard water. CO2 supplementation promotes more vigorous growth in planted aquarium conditions. Root systems are absent or reduced in some species, which are planted directly in substrate or allowed to float. Several species have become invasive in natural waterways following aquarium release, leading to import restrictions in certain regions.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
Worldwide, in temperate to tropical lakes and rivers
Lifespan
Perennial
Size
20-100cm
Temperature
18〜28℃
Watering & Fertilizer
None needed
Growing Tips
Lighting
Grows in any light level
Water Quality
Strong water purification ability
Propagation
Grows from fragments
Notes
Thin if overgrown. One of the hardiest aquatic plants
Hornwort FAQ
QWhat is the growing difficulty level for Hornwort?
Beginner. A variety suitable for beginners. No special equipment or experience is required—you can grow it without problems by setting up a basic cultivation environment.
QWhat is the ideal temperature for Hornwort?
The ideal temperature for Hornwort is 18〜28℃. Avoid sudden temperature changes and maintain a stable environment.
QWhat is the lifespan of Hornwort?
The average lifespan of Hornwort is Perennial. With proper cultivation environment and nutrient management, you can keep it healthy for a long time.
QHow large does Hornwort get?
The mature size of Hornwort is 20-100cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Hornwort?
Hornwort: watering & fertilizer — None needed. Aim for appropriate frequency and amount.
QWhat is the typical price for Hornwort?
The price of Hornwort varies significantly by variety, characteristics, size, and lineage. Please check ボタちょく's price guide for the latest market information.
Last updated: June 24, 2026
References & Sources
Edited & verified by: BoTachoku 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
DB学名は Ceratophyllum demersum(マツモ、在来種)。特定外来生物オオフサモ Myriophyllum aquaticum とは別種・別科。
Sources: 環境省 特定外来生物等一覧(外来生物法) / CITES Appendix II 植物掲載分類群(科・属レベル)
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
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