Ceratopteris thalictroides

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

It is extremely versatile and can be anchored in the substrate, attached to hardscape, or allowed to float freely. Care must be taken not to bury the central rosette to avoid suffocating the plant.

Botanical form

Rosette

The plant produces deeply incised, delicate, bright green fronds that create a lush, feathery texture. As it matures, the leaves can become quite large and complex, adding significant volume to the aquascape.

Growth

very-fast

It is famously fast-growing, quickly transforming from a small sprig into a massive, bushy centerpiece. Regular and sometimes aggressive trimming is required to keep its size manageable.

Substrate

Low

Ceratopteris thalictroides is an incredibly versatile fern that can be grown either rooted in an inert substrate or left to float freely at the water's surface. When planted, a simple gravel or sand base is perfectly adequate, as it primarily draws its nutrients directly from the water column through its extensive, fine root network. If planting in the substrate, ensure the crown of the plant remains slightly exposed above the gravel to prevent rotting while allowing the roots to securely anchor the buoyant foliage.

Column fertilization

Recommended

It feeds heavily from the water column, absorbing macronutrients and trace elements rapidly. Consistent liquid dosing is highly beneficial and promotes vigorous, healthy new growth.

Root fertilization

None

If planted, it establishes an extensive root system and will heavily utilize nutrients from aquasoil or root tabs. It is, however, not strictly reliant on substrate feeding.

Trimming

Occasional

To prune, simply snip off the oldest, outermost leaves as close to the base as possible. Thinning out the plant regularly ensures that light reaches the inner growth and prevents bottom leaves from dying off.

Propagation

Division

It naturally and continuously produces small plantlets along the margins of its older leaves. These baby plants can be easily detached and replanted to create a dense thicket.

Sensitivity

Moderate

It is generally a very resilient and beginner-friendly plant, though its leaves are physically delicate. It may melt slightly when first introduced to a new tank but usually recovers quickly.

Layout role

Midground, Background

It is widely used as a bright green background plant or a stunning, fast-growing centerpiece. Floating it provides fantastic cover for fry and creates beautiful, trailing roots.