Aponogeton Rigidifolius

Aponogeton rigidifolius is endemic to Sri Lanka. While other members of the genus grow from a tuber or bulb, this species has a long rhizome that creeps along the substrate surface, and new leaves emerge from this rhizome. This has an important consequence: unlike many Aponogetons, it does not shed its leaves and go dormant in winter. Its leaves are 20–55 cm long but only about 2.5–4 cm wide; as its name suggests, their texture is stiff, and their color ranges from dark green to reddish brown.

The rhizome is pressed lightly onto the substrate or buried very shallowly; the roots are directed into nutrient-rich substrate. It takes time to settle in, so do not move it during this period. Because of its height, it is used in the background, in a spot with gentle flow, alone or in a small group.

• Light: Medium; very strong light is not necessary.
• CO₂: Beneficial; together with good water movement it supports growth.
• Fertilizer: Root tabs are recommended.
• It grows slowly, but is hardy once established. As the rhizome lengthens, it can be propagated by dividing it so that each piece keeps a few leaves.