Ludwigia repens

Scientific name: Ludwigia repens

Family: Onagraceae

Usual maximum size in aquariums: 20 - 40 cm (7.87 - 15.75 inch)

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Recommended pH range for the species: 6.4 - 7.8

Recommended water hardness (dGH): 4 - 18°N (71.43 - 321.43ppm)

0°C 32°F30°C 86°F

Recommended temperature: 15 - 28 °C (59 - 82.4°F)

Reproduction of the plant: Cuttings

Origin (in the wild): Central America

How fast these plants grow: Fast

Recommended substrate: Fine gravel

Demands on lighting: Bright

Ideal placement in a fish tank: Background

Common Names

Red Leaf Ludwigia, Red Repens

Origin

Central America and southern parts of North America, including Mexico and the southern United States. Ludwigia repens naturally grows along riverbanks, in marshes, and in shallow, slow-moving freshwater bodies.

Propagation

Ludwigia repens is easily propagated by cuttings. Take healthy stem cuttings from the top or lateral shoots, remove the bottom leaves, and insert the bare stem gently into the substrate. Roots typically form quickly. Planting several cuttings together in a small group enhances bushy growth. After trimming, the mother plant will often produce new side shoots, becoming denser over time.

Difficulty

Medium

Short Description

Ludwigia repens is a beautiful, fast-growing aquatic plant that thrives when fully submerged but can also grow in emersed or semi-aquatic conditions. It is ideal for the background of freshwater aquariums and responds well to trimming. Under bright lighting, the leaves develop a rich red coloration. In lower light, leaves may turn green or fall off, indicating the need for more light. This plant also benefits from supplemental CO₂ and nutrients, especially iron, to maintain its vibrant colors and strong growth.

Frequently Asked Questions (FAQ)

Why is my Ludwigia repens turning green instead of red?

This usually happens due to insufficient lighting. Ludwigia repens requires bright light to develop its signature red coloration. Increasing the intensity or duration of your lighting can help restore the red pigment.
Can Ludwigia repens grow without CO₂ supplementation?

Yes, it can grow without CO₂, but it will likely grow slower and show less intense coloration. For lush, vibrant growth, a CO₂ system is recommended.
How often should I trim Ludwigia repens?

You can trim Ludwigia repens weekly or biweekly, depending on how fast it grows in your setup. Frequent trimming encourages bushier growth and helps maintain the desired shape and density.
Is Ludwigia repens suitable for beginners?

Yes, it's considered a good plant for beginner to intermediate aquarists. It’s hardy and adaptable, but requires bright light to thrive and maintain its red coloration.
Can Ludwigia repens be grown emersed?

Yes, it can be grown emersed in humid conditions such as paludariums or shallow setups. In emersed form, it tends to be greener and may produce small yellow flowers.