Filigree Milfoil

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Filigree Milfoil (Myriophyllum pinnatum) is an elegant freshwater stem plant prized for its delicate, finely divided foliage and attractive feathery appearance. Its intricate leaves create excellent texture and movement within a planted aquarium, making it particularly effective for adding depth to aquascapes.

Under good lighting, Filigree Milfoil can develop attractive green to bronze and reddish tones, especially in the newer growth. Its fine foliage contrasts beautifully with broad-leaved plants and hardscape.

It is best suited to the midground or background and looks particularly impressive when planted as a dense group. Regular trimming encourages branching and allows you to maintain a fuller, more compact appearance.

Good lighting, consistent fertilisation and CO₂ will help produce the strongest growth, although it can be grown successfully in a moderately equipped aquarium.

Quick Care Guide

Scientific Name: Myriophyllum pinnatum

Common Name: Filigree Milfoil

Family: Haloragaceae

Type: Stem Plant

Difficulty: Moderate

Growth Rate: Moderate to Fast

Placement: Midground to Background

Lighting: Moderate to High

CO₂: Recommended

pH: 6.0–7.5

Temperature: 20–28°C

Water Hardness: Soft to Moderately Hard

Propagation: Stem Cuttings

Colour: Green to Bronze/Red

Aquarium Type: Freshwater

Frequently Asked Questions

Does Filigree Milfoil need CO₂?

It can grow without injected CO₂, but CO₂ supplementation is recommended for stronger growth, denser foliage and better coloration.

How do I get Filigree Milfoil to develop colour?

Good lighting, stable CO₂ and balanced nutrients can encourage bronze and reddish tones, particularly in healthy new growth.

Where should I plant Filigree Milfoil?

It is best suited to the midground or background, where its fine foliage can create texture and depth.

How fast does Filigree Milfoil grow?

It can grow relatively quickly under favourable conditions and benefits from regular trimming.

How do I propagate it?

Cut healthy sections of stem and replant them into the substrate. The remaining stem can produce new side shoots.

Why is my Filigree Milfoil becoming sparse?

Insufficient light, unstable CO₂, nutrient deficiencies or excessive shading can cause weaker and more open growth.

Common Mistakes

❌ Using insufficient lighting

❌ Allowing taller plants to shade it

❌ Keeping CO₂ levels inconsistent

❌ Neglecting fertilisation

❌ Planting stems too tightly together

❌ Failing to trim and replant healthy tops