Myriophyllum aquaticum 'Santa Catarina'

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

Given its size and spreading nature, this plant is an excellent choice for the background of a planted aquarium. It can also be utilized effectively in the midground if kept aggressively trimmed. Its structural density makes it a superb background canvas that frames other aquatic elements.

Botanical form

Stem

It features the classic feathery, pinnate leaves arranged in whorls along a sturdy stem. The 'Santa Catarina' form is known for having a slightly denser and more compact leaf arrangement compared to the standard form. The foliage remains bright green under most conditions, offering a soft visual texture.

Growth

Medium

This variant exhibits a fast to very fast growth rate, typical of the species, particularly under intense lighting and with CO2 injection. It responds very well to optimal conditions, quickly reaching the water surface. Regular pruning is essential to prevent it from overtaking smaller foreground plants.

Substrate

High

Column fertilization

Recommended

Liquid fertilization is the most efficient way to feed this plant, as its finely divided leaves absorb nutrients directly from the water column. A complete liquid fertilizer should be dosed regularly to sustain its rapid growth. Consistent column feeding helps prevent the lower leaves from yellowing or melting.

Root fertilization

None

While it draws heavily from the water column, a nutrient-rich substrate provides an excellent foundation. Root tabs can be beneficial, particularly in mature tanks where the substrate nutrients may be depleted. A healthy root system ensures the fast-growing stems remain anchored.

Trimming

Occasional

Frequent trimming is a must; simply cut the stems at the desired height and replant the tops to thicken the bush. The original rooted portion will quickly sprout new side shoots. Regular pruning prevents the plant from shading out its own lower portions or neighboring plants.

Propagation

Cuttings

Propagation is straightforward and highly successful through stem cuttings. Snipping a healthy top or side shoot and planting it directly into the substrate is all that is needed. The cuttings will usually root within a few days under good conditions.

Sensitivity

Moderate

It is generally a hardy and adaptable plant, though it can be sensitive to sudden extreme changes in water parameters. It requires good light penetration; otherwise, the lower leaves will quickly drop off. Ensuring adequate water flow prevents detritus from accumulating on the fine leaves.

Layout role

Midground, group, accent

In an aquascape, this plant is perfect for creating dense, bright green background thickets. Its soft, feathery texture contrasts beautifully with broad-leaved plants or hardscape materials. It works exceptionally well in both Dutch style and nature aquarium layouts.