Myriophyllum Aquaticum Care Guide: Feathery Parrot’s Feather

Myriophyllum aquaticum, commonly known as parrot’s feather, is a stunning feathery stem plant that creates a soft, pine-tree-like texture in the aquarium. Its whorled, finely divided leaves give any aquascape a delicate, ethereal quality. This Myriophyllum aquaticum care guide from Gensou Aquascaping at 5 Everton Park will help you grow this beautiful but sometimes demanding plant.

Plant Overview

Myriophyllum aquaticum originates from South America and has naturalised in warm regions worldwide. In the aquarium, it grows as an upright stem plant reaching 30–60 cm, with whorled leaves that fan out in a feathery pattern. The plant is amphibious — it grows readily in both submersed and emersed forms. The emersed growth is actually more vigorous, with stiffer, blue-green leaves that emerge above the water surface if allowed.

Light and CO2 Requirements

This plant demands moderate to high lighting for healthy submersed growth. Under low light, the lower stems lose leaves rapidly, creating bare, unsightly stalks. CO2 injection is strongly recommended — without it, growth is slow and the feathery leaves may not develop fully. Aim for 60–100 PAR at substrate level and a CO2 concentration of 20–30 ppm for best results.

Substrate and Nutrients

Myriophyllum aquaticum feeds from both roots and the water column. A nutrient-rich substrate helps establish strong root systems, while regular liquid fertiliser dosing ensures the fine leaves get adequate nutrition. Iron and micronutrients are particularly important — deficiency causes the growing tips to turn pale or white. Consistent macronutrient dosing (nitrogen, phosphorus, potassium) keeps growth dense and green.

Planting and Placement

Plant stems in bunches of three to five in the background of the tank. Push them 3–4 cm into the substrate and space bunches 5 cm apart. The feathery texture creates an excellent contrast when placed behind broad-leaved plants like Anubias or Echinodorus. In Dutch-style aquascapes, Myriophyllum is valued for its unique texture that adds variety to plant groupings.

Pruning and Propagation

Trim the tops regularly to prevent the plant from reaching the surface and switching to emersed growth. Cut stems can be replanted directly — they root within days. The cut stump produces side shoots, creating a denser appearance. Frequent topping and replanting keeps the plant looking its best and prevents the lower stems from going bare.

Emersed and Paludarium Use

Myriophyllum aquaticum is excellent for paludariums and ripariums. The emersed growth is particularly attractive, with stiffer, more colourful leaves that form dense clusters above the waterline. In outdoor tub setups popular in Singapore’s tropical climate, it grows prolifically and provides excellent cover for breeding fish and shrimp.

Common Issues

Lower leaf loss is the most common problem, usually caused by insufficient light or nutrient deficiency. Algae growth on the fine leaves can smother the plant — maintain good CO2 levels and nutrient balance to keep algae in check. The plant may melt back initially after planting if transitioning from emersed to submersed growth. New submersed leaves will replace the old growth within two to three weeks.

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