Ceratopteris siliquosa

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

Highly adaptable, it can be planted firmly in the substrate or used as a floating cover. When planting, ensure the crown is not buried too deeply to prevent rot.

Botanical form

Rosette

It is characterized by highly dissected, fine, and lacy bright green fronds, giving it a very delicate appearance. The intricate branching structure makes it visually striking and provides excellent surface area for biofilm.

Growth

Medium

It boasts an extremely fast growth rate, especially when provided with strong light and abundant nutrients. Routine pruning is essential to prevent it from smothering slower-growing species.

Substrate

Low

Ceratopteris siliquosa is an adaptable fern with low substrate demands, capable of growing well in plain gravel or sand. Its delicate but widespread root system functions primarily for anchorage when planted in a shallow bed of 3-5 centimeters. It derives the bulk of its nutritional needs from the water column, making active soils unnecessary. This species can also transition easily to a floating lifestyle, utilizing its roots to draw nutrients directly from the water.

Column fertilization

Recommended

It readily absorbs nutrients through its extensive leaf surface area from the water column. Regular liquid fertilization ensures healthy, continuous growth and prevents the lower leaves from yellowing.

Root fertilization

None

When rooted, it develops a surprisingly robust root network that benefits from a nutrient-rich substrate or root tabs. However, it can also thrive purely on water column nutrients if appropriately dosed.

Trimming

Occasional

Trimming involves removing older, larger outer fronds at the base to manage the plant's spread. It is better to remove whole leaves rather than cutting leaves in half, which can lead to decay.

Propagation

Division

It multiplies readily by forming small adventitious plantlets on the edges of its mature leaves. These can be left to detach naturally or carefully removed and planted once they show roots.

Sensitivity

Moderate

The extremely fine leaves are fragile and prone to collecting debris if mechanical filtration is inadequate. It thrives in calm water, as strong currents can easily break the delicate fronds.

Layout role

Background, Floating

It is commonly used as a fast-growing background plant that provides a bright, bushy, and highly textured look. It is also an exceptional refuge for small fish and shrimp due to its dense, complex foliage.