Callitriche hermaphroditica
Callitriche hermaphroditica · Plantaginaceae
The gardener's calendar
Ideal time to plant callitriche hermaphroditica: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Callitriche hermaphroditica
- Family
- Plantaginaceae
- Form
- Submerged aquatic plant
- Foliage
- Persistent, linear and opposite
- Mature size
- 5 to 15 cm in height
- Growth
- Fast to moderate
- Hardiness
- Very hardy (cold water)
- Origin
- Europe, Northern Asia and North America
Care
Water immersion and circulation
This aquatic plant must remain completely submerged in clear, fresh water that is well oxygenated. Perform partial water changes regularly (20 to 30% per week) to maintain optimal quality. Ensure there is slight water circulation to prevent the accumulation of stagnant organic matter.
Lighting
Callitriche hermaphroditica prefers moderate to strong light exposure, between 6 and 10 hours of light per day depending on intensity. In an aquarium, use specialized LED lighting for aquatic plants. Insufficient light slows its growth and produces less dense foliage.
Substrate and anchoring
Plant it slightly buried in nutrient-rich substrate (sand, fine gravel or specialized aquatic plant soils) to promote rooting. The plant can also float freely, but anchoring facilitates its harmonious development. A nutrient-rich substrate supports better growth.
Fertilization
Apply a complete liquid fertilizer for aquatic plants once or twice per month, respecting recommended dosages. You can also use fertilizer tablets buried in the substrate. Micronutrient deficiencies (iron, boron) can cause foliage to yellow.
Pruning and maintenance
Pinch back the stems regularly to encourage a bushier and more compact form. Remove dead or damaged leaves to maintain good water quality. This gentle pruning promotes branching and improves the plant's aesthetic appearance in your aquarium.
Pests and common issues
Callitriche hermaphroditica is generally robust, but can suffer from filamentous algae in poor water quality. Monitor parameters (pH, NO3, PO4) and clean regularly. Snails and certain fish may nibble on it slightly without destroying it.
Did you know?
Callitriche hermaphroditica is one of the rare aquatic plants where each flower contains both male and female organs, justifying its name 'hermaphrodite.' Long confused with other Callitriche species, it was used in aquarium keeping for years without clear botanical recognition. It is a pioneer plant of cold waters in boreal and temperate zones, capable of surviving harsh winters thanks to its great tolerance.
Where to buy it
Best planted in spring or autumn, away from frost and heatwaves. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September, October.
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Tips generated and checked by Viridia — adapt them to your local climate.