Ludwigia repens is a common and popular aquarium plant the world round. This is one of the easiest aquarium plants to grow and is able to grow in a wide range of lighting conditions. Ludwigia is an excellent candidate for a ‘high-tech’ aquarium, where it will display red colouration when supplied with high lighting, lean nitrate levels (~5 ppm), high phosphate levels (~1.5-2 ppm), and heavy iron/micronutrients dosing. Some hobbyists have noted that 9325K plant bulbs will also enhance red coloration. However, in the same breath, this plant makes a superb addition to any low-tech aquarium. Under lower lighting conditions, with minimal water column dosing this plant will produce minimal lateral growth unless frequently trimmed. For those that enjoy the unkempt planted aquarium look, I would suggest allowing this plant to reach the surface. Once at the surface it will spread along the water’s surface, producing lateral shoots to maximise on the increased CO2 levels.
To propagate, simply snip off a healthy stem and replant into the substrate. Pruning off the top portions of this plant and leaving the rooted portions in the substrate promotes very bushy growth as the plant should produce a multitude of side shoots. Pruning can also be done by discarding the rooted portions and planting the top portions into the substrate.
In aqua-scaping, this versatile plant can be used in the mid-ground and background positions as a focal point or reddish accent. With intense pruning, the plant can even be used as a foreground plant in large aquaria.