Lagarosiphon major Care Guide
Lagarosiphon major is a southern African oxygenating stem plant with curly recurved leaves that prefers cool to temperate water and grows quickly.
Overview
Lagarosiphon major is a submerged stem plant in the family Hydrocharitaceae, known for its densely packed curly, recurved leaves. It is a strong oxygenator best suited to cooler aquariums and is sometimes confused with Egeria species in the trade.
Taxonomy
- Family: Hydrocharitaceae
- Genus: Lagarosiphon
- Scientific name: Lagarosiphon major
- Common synonyms: African curly waterweed, curly waterweed; Elodea crispa (trade name)
Habitat
The species is native to southern Africa, where it grows submerged in freshwater. The curly or recurved leaf arrangement is reflected in its older trade name Elodea crispa. It adapts well to cool and temperate conditions.
Aquarium requirements
- Placement: background
- Temperature: 12-24 °C (54-75 °F)
- pH: 6-8
- GH: 4-20 °dGH
- Lighting: medium to high
- CO2: not required (responds to 5-40 mg/L)
- Maximum height: about 60 cm
Growth and care
Lagarosiphon major grows fast and is rated easy. It prefers cooler water and may decline if temperatures stay above roughly 24 °C for extended periods, which makes it a good fit for unheated or coldwater tanks. Trim every ten days or so to keep growth dense.
Propagation
Propagation is by cuttings and fragmentation. Stems may be rooted in substrate or left floating, and side shoots quickly develop into new plants.
Notes on invasiveness
Lagarosiphon major is a regulated invasive species in several regions. It is listed on New Zealand's National Pest Plant Accord, is treated as a noxious weed in the United States, and since 2016 is on the European Union's list of Invasive Alien Species of Union concern, where its sale and release are prohibited. Check local regulations before keeping it.