Nymphaea rubra

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

This plant is typically placed in the midground or background of the aquarium where it has ample space to spread its large leaves. It should be situated in a location where it does not shade out smaller, light-demanding plants. Its striking red foliage serves as an excellent focal point.

Botanical form

Rosette

It forms a central bulb or tuber from which broad, arrow-shaped to rounded leaves emerge on long stems. The leaves are typically a vibrant shade of deep red to maroon, sometimes with subtle green undertones or mottling. It is a classic aquatic lily in appearance.

Growth

Fast

The growth rate is generally fast when provided with adequate light and nutrition. It will rapidly produce new submerged leaves and may attempt to send floating leaves to the surface. Trimming is often required to keep the growth manageable.

Substrate

High

Column fertilization

Recommended

While primarily a root feeder, it benefits from regular water column fertilization to ensure a balanced nutrient supply. Iron supplements help maintain the intense red coloration of the leaves. Potassium and micronutrients are also important to prevent leaf pinholes and yellowing.

Root fertilization

Required

Root fertilization is critical for the success of Nymphaea rubra. A nutrient-dense aquasoil or the frequent addition of root tabs will result in a robust root system and healthier foliage. Without sufficient root nutrition, the plant may stunt or lose its vibrant color.

Trimming

Occasional

To keep the plant compact and prevent it from shading the aquarium, floating leaves should be snipped off at the base of the stem as soon as they appear. Older, decaying submerged leaves should also be removed to encourage new growth. Avoid cutting the central tuber during trimming.

Propagation

Rhizome division, Seeds

Propagation is most commonly achieved through the separation of daughter plants or side shoots that develop from the main tuber. Once a daughter plant has formed its own roots and several leaves, it can be carefully detached and replanted. It can also be propagated from seeds if flowers are successfully pollinated.

Sensitivity

Moderate

This lily can be sensitive to sudden changes in water parameters or an extended lack of nutrients, which may cause it to enter a dormant state. It is generally tolerant of a wide range of temperatures but prefers slightly acidic to neutral water. Ensure the tuber is not completely buried, as it may rot.

Layout role

Midground, accent

Nymphaea rubra serves as a spectacular solitary or specimen plant due to its large size and bold color. It breaks up the greenery in a planted tank and draws the eye. It is ideal for Dutch and Nature style aquariums as a contrasting element.