Aponogeton Crispus

Quick facts

Identity

Also known as

Ruffled Sword Plant; Crisp Aponogeton; Wavy-leaved Aponogeton

Synonyms

Aponogeton undulatus

Environment

Freshwater

Native to

Sri Lanka, Southern India

Habitat

Submersed in streams, ponds, and seasonal pools that dry down part of the year, favoring soft, nutrient-rich water

Sourcing

Aquacultured

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Rosette

Max height

8 – 20 in (20 – 51 cm)

Spread

12 in (30 cm)

Growth rate

Fast

Placement

Midground, Background

Water

Temperature

72 – 82 °F (22 – 28 °C)

pH

5.5 – 7.5

GH

2 – 12 dGH

Flow

Low-Moderate

Light

Medium

CO₂

Beneficial

Planting

Substrate

Nutrient-rich preferred

Feeds from

Roots

Fertilizer needs

Medium

Colors

Green, Brown

Feeding & breeding

Propagation

Seeds, Rhizome division

Something wrong or missing? Submit a correction

Care guide

Overview

Unfurls long, wavy-margined leaves from a central rosette, quickly filling the upper background of a tank within weeks of planting. Leaves show a light, slightly translucent green and tolerate low to medium light, though color and vigor pick up under stronger lamps and root tabs. Periodic dormancy after flowering is normal; the tuber regrows once conditions settle.

Care

A hardy rosette plant grown from a bulb-like tuber, it produces long, wavy-edged leaves that reach the middle to back of the tank within weeks of planting. It tolerates a broad temperature range and adapts to low or medium light, though growth and leaf color improve under stronger lighting. Expect an occasional dormancy where the plant sheds its leaves after flowering; leave the tuber in the substrate and new growth typically resumes within a few weeks to a couple months.

Planting & trimming

Set the tuber on top of the substrate or bury it only partway with the growing tip exposed, since fully burying it invites rot. Once roots take hold the plant anchors itself, after which surrounding substrate can be built up slightly around the base. Give it generous spacing, as mature leaves spread wide and can shade out smaller foreground plants.

Fertilizing

The tuber carries enough stored energy to fuel the first few months of growth, but ongoing vigor depends on a nutrient-rich substrate and regular root tabs, since this species feeds primarily through its roots. A weekly liquid fertilizer with iron helps offset any gaps in the substrate, and pale or yellowing new leaves usually signal a need for more iron or a richer root zone. In fish-stocked tanks, waste and mulm buildup in the substrate often supplies enough nitrogen on its own.

Propagation

New plants form from seed after hand-pollinating the emergent flower spike, with seedlings taking several weeks to germinate before being potted. Mature tubers sometimes produce small offset bulbs that can be separated and replanted once they develop their own roots. Careful splitting of the rhizome is also possible, though it is used less often than seed propagation or offset removal.

Problems

Leaf loss shortly after planting is a normal adjustment as the plant converts from emersed nursery growth to submersed leaves, not a sign of disease. Algae film on older leaves is common and usually traces back to excess light relative to available nutrients or weak flow rather than a fault of the plant itself. A gradual yellowing and dying back of leaves signals the onset of natural dormancy rather than a health problem.

Sources

1. Aponogeton crispus - Wikipedia
2. Aponogeton Crispus Aquarium Plant Care
3. Aponogeton crispus (Aponogeton Crispus) Care Guide
4. Aponogeton crispus care: light, CO2 and placement · TankBud

More Aponogetons

Aponogeton Madagascariensis / Madagascar Lace BulbAponogeton Natans