Ludwigia mullertii

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

This plant is highly versatile and can be used in the midground or background of the aquarium, depending on the tank's size. Grouping several stems together creates a vibrant and bushy focal point. It can also be allowed to float at the surface, where it provides excellent cover for fry.

Botanical form

Stem

It features oppositely arranged, slightly elongated oval leaves that grow along a sturdy stem. The leaf color can vary from olive green to a deep, rusty red depending on the intensity of the light it receives. The stems themselves often take on a reddish hue under optimal conditions.

Growth

Medium

It boasts a fast growth rate, especially when provided with strong lighting and a nutrient-rich environment. In low-tech setups without CO2 injection, it still grows steadily, albeit at a slightly slower pace. Frequent pruning will be necessary to manage its rapid upward and lateral spread.

Substrate

Medium

Benefits from a balanced, moderately fertile substrate like aqua soil or sand supplemented with root tabs. Its roots are adaptable and will quickly anchor into a 1.5 to 2-inch substrate bed, drawing essential nutrients for steady growth. Providing a nutrient-rich base ensures stronger stem development and more vibrant leaf coloration.

Column fertilization

Recommended

Liquid fertilization is beneficial but not strictly necessary if the aquarium has a moderate fish bioload to provide natural waste. Occasional dosing of a comprehensive fertilizer will prevent nutrient deficiencies and support robust leaf development. Iron supplements are the most effective way to encourage its red pigmentation.

Root fertilization

None

While it can absorb nutrients through its leaves, it forms a robust root system when planted in a nutrient-rich substrate. Root tabs can be used to promote thicker stems and larger leaves, especially in tanks with inert gravel or sand. A fertile substrate also helps establish new cuttings more quickly.

Trimming

Occasional

Regular trimming is essential to prevent the plant from becoming leggy and shading out its own lower leaves. Cutting the top portions and replanting them is an excellent way to maintain a fresh, compact look. The remaining lower stems will quickly sprout multiple side shoots, increasing the bushiness of the group.

Propagation

Cuttings

Propagation is incredibly simple and is done by taking cuttings from healthy stems. Plant the cut ends into the substrate, and they will root within a few days. Even floating cuttings will rapidly develop roots and can be planted once established.

Sensitivity

Moderate

Ludwigia mullertii is known for its hardiness and tolerance to a wide range of water parameters, making it ideal for beginners. It is not particularly sensitive to fluctuations in pH or hardness. However, insufficient light will cause it to lose its reddish coloration and revert to a plain green hue.

Layout role

Midground, Background

It acts as a reliable and colorful filler plant that adds volume and texture to the aquascape. Its reddish tones provide a beautiful contrast against light green background plants or dark hardscape materials. It is perfect for creating dense, natural-looking thickets in a variety of aquascaping styles.