Bacopa australis

Species description

Care, breeding and tankmates

Plant profile

Placement

Foreground

This versatile plant is primarily used in the midground, where its dense, bushy growth provides an excellent transition between carpeting plants and taller background species. In smaller aquariums, it can even serve as a lovely background plant. Its tendency to creep along the substrate allows it to soften hardscape edges effectively.

Botanical form

Stem

Bacopa australis features pairs of small, bright green, almost perfectly round leaves arranged oppositely along a somewhat fragile stem. Unlike many other stem plants, it has a strong tendency to grow horizontally or creep along the substrate before turning upwards. This creeping habit makes it unique and highly sought after for creating dense bushes.

Growth

Fast

It exhibits a moderately fast growth rate, especially when provided with strong lighting and CO2 injection. Even in low-tech setups, it will grow steadily, though the internodes may become slightly elongated. Its fast growth means it quickly recovers from aggressive pruning.

Substrate

High

This versatile stem plant strongly benefits from a fine, nutrient-rich substrate to comfortably anchor its delicate stems. It roots quickly at the nodes when planted deeply, drawing significant nutrients from the soil to support its lush, creeping growth. While it can grow in inert sand, an active aqua soil or root tabs will significantly enhance density and leaf coloration.

Column fertilization

Recommended

Liquid fertilization is beneficial to ensure the water column contains sufficient nutrients to support its vigorous growth. A regular dosing schedule of a complete fertilizer will encourage lush, dense foliage. It absorbs nutrients efficiently through its leaves as well as its roots.

Root fertilization

None

A nutrient-rich substrate strongly encourages the robust growth of Bacopa australis. The use of an aquasoil or root tabs will provide a steady source of nutrition, allowing the plant to develop a strong root system and thick stems. It can be grown in inert gravel, but growth will be less compact.

Trimming

Occasional

Frequent pruning is necessary to maintain its bushy shape and prevent it from shading itself. Simply cut the stems at the desired height; the plant will quickly produce new side shoots from the cut nodes. The trimmed tops can easily be replanted to create an even denser grouping.

Propagation

Cuttings

Propagation is straightforward and typical of stem plants: simply cut a healthy stem and replant the cutting into the substrate. The cutting will root within a few days and begin growing. Because of its creeping habit, it may also send out horizontal runners that root themselves, which can be detached and moved.

Sensitivity

Moderate

This plant is incredibly hardy and adaptable, tolerating a wide range of water parameters, from soft to moderately hard water. It is not particularly sensitive, making it an excellent choice for beginners. However, it can become leggy and sparse at the bottom if the upper foliage blocks out too much light.

Layout role

Midground, group, Foreground, Background

Bacopa australis is a superb plant for creating dense, bright green bushes in the midground of an aquascape. Its creeping nature allows it to gracefully spill over rocks or driftwood, creating a very natural, wild look. The contrast of its rounded leaves against more angular or finely leaved plants is visually appealing.