Aponogeton crispus
Aponogeton crispus
Also known asAponogeton · Sri Lankan aponogeton · rippled aponogeton
Water parameters
Light and nutrients
Substrate type: nutrient rich. Propagation: seeds.
Substrate compatibility
| Substrate | pH effect | Nutrient load |
|---|---|---|
| Aquasoil (ADA Amazonia) | lowers pH | very high |
| Mineralized clay substrate (Seachem Fluorite) | neutral / inert | moderate |
| Dirted tank (mineralized topsoil) (DIY soil substrate) | slightly acidic | very high |
With fish
Origin and habitat
Native to Sri Lanka, where it grows in slow-moving streams, ponds, and shallow lake margins. The species produces a bulb (corm) from which long, wavy-edged leaves (hence 'crispus') grow in a rosette. Leaves are translucent, light green, and distinctively ruffled along the margins, giving the plant an elegant, flowing appearance in current. Adults can reach 30–50 cm in height. Aponogeton crispus was one of the earliest Aponogetons in the aquarium trade and remains one of the most forgiving species in the genus. The plant goes through a natural dormancy cycle: after months of active growth, it may die back to the bulb and rest for 4-8 weeks before producing new leaves.
Care notes
Grows from a bulb planted halfway into the substrate (the top half of the bulb should be visible above the gravel). In pet stores, the bulbs are often sold dry in packets labeled 'aquarium plant bulbs.' These dry bulbs are hit-or-miss; many are dead or fungused. Better results come from buying actively growing specimens. Moderate light and no CO2 produces good results. The ruffled leaves are attractive in gentle current, where they wave with the water movement. Root tabs improve growth since the plant feeds heavily through its root system and the bulb. Dormancy is normal and not a sign of problems: after 6-12 months of growth, the plant may shed all its leaves and the bulb sits apparently dead for weeks before regrowing. Don't throw it away during dormancy. Some keepers remove the bulb during dormancy and store it in a damp paper towel in the refrigerator for 4-6 weeks, then replant; others leave it in the tank and let it rest in place. Propagation is by daughter bulbs that form at the base of the parent, or by seed if the plant produces a flower spike above the water surface. Growth rate is moderate to fast; a healthy specimen produces a new leaf every 3-5 days. The plant occasionally produces a flower spike that rises above the water surface; the flowers are small and white. If two plants flower simultaneously, cross-pollination can produce viable seed. Aponogeton crispus is one of the most forgiving species in the genus, tolerating conditions that would kill more demanding Aponogetons like A. madagascariensis (lace plant).