Species description

Care, breeding and tankmates

Plant profile

Placement

Background

It is a true epiphyte that must be attached to driftwood or porous rocks. It is best placed in the midground or background where the water flow is moderately strong. Never bury the rhizome in the substrate, as this will quickly cause the entire plant to rot.

Botanical form

Epiphyte

This African water fern features a thick, dark green rhizome and deeply lobed, pinnate leaves that are somewhat translucent. The dark, bottle-green color of its foliage is distinct and highly prized in aquascaping. Submerged leaves are delicate and elegant, while emersed leaves are stiffer and more robust.

Growth

Slow

Its growth rate is typically slow, though it can become moderate under optimal conditions with CO2 and soft, slightly acidic water. It takes time to establish itself after being moved or newly planted. Once acclimated, it steadily produces large, impressive fronds.

Substrate

None

The African Water Fern (Bolbitis heudelotii) is a classic epiphyte that categorically rejects being buried in sand, gravel, or soil. Its thick, dark green rhizome must be attached to driftwood or porous rocks, where its strong adhesive roots can wrap securely around the surface. It relies exclusively on water column dosing for its nutritional intake, flourishing when exposed to a steady current that brings fresh dissolved minerals.

Column fertilization

Recommended

It absorbs all its required nutrients directly from the water column. Regular dosing of a complete liquid fertilizer rich in potassium and micronutrients is highly beneficial. Iron supplementation can help maintain its characteristic deep green hue and prevent yellowing.

Root fertilization

None

Because it is an epiphyte, substrate fertilization is completely unnecessary and ineffective for this plant. It develops strong anchoring roots that grip hardscape surfaces but do not dig into soil. Focus your fertilization efforts entirely on the water column.

Trimming

Occasional

Maintenance involves selectively trimming older, decaying, or algae-covered fronds as close to the rhizome as possible. Overgrown clumps can be aggressively pruned to encourage a fresh flush of new, clean leaves. Do not trim the tips of the leaves; always remove the entire leaf stalk.

Propagation

Rhizome division

Propagation is simple and is done by dividing the main rhizome into smaller pieces. Ensure that each separated piece has a healthy growing tip, some roots, and a few fronds. Reattach the new divisions to wood or stone using cotton thread or cyanoacrylate gel.

Sensitivity

Moderate

It is highly sensitive to poor water circulation and stagnant conditions, which invite black beard algae to form on the edges of its slow-growing leaves. It also strongly prefers cooler water temperatures, ideally below 26°C (79°F). Warmer water can lead to stunted growth and premature leaf decay.

Layout role

Background, Midground, Epiphyte

It is a classic staple in Nature Aquarium layouts, often used to create a dark, shadowy backdrop against driftwood. Its deep green color provides a striking contrast to bright green stem plants or light-colored sands. The flowing, translucent leaves add a serene, natural atmosphere to the aquascape.