Ludwigia repens, commonly known as Ludwigia repens or Creeping Primrose, is a popular and vibrant aquatic plant native to Central and South America, particularly regions of Brazil, Colombia, and Venezuela. Appreciated for its striking red and green foliage, this species is frequently used in planted aquariums for its aesthetic appeal and ease of cultivation. Physically, Ludwigia repens (often confused with closely related species) has elongated, oval-shaped leaves arranged oppositely along sturdy, upright stems. The leaves are typically bright green to reddish-green in normal lighting conditions, turning deep red or burgundy under intense lighting conditions. It grows moderately fast, reaching heights of approximately 12 to 20 inches (30 to 50 centimeters), making it suitable as a midground or background plant. In the aquarium, Ludwigia thrives in setups that provide medium to high lighting conditions, essential for maintaining its vibrant colors. CO₂ supplementation is beneficial but not strictly necessary; however, it significantly enhances growth and coloration. Regular dosing of liquid fertilizers, especially those containing iron, will help the plant maintain its striking red hues. Ludwigia grows best in a nutrient-rich substrate but can also flourish when planted in standard aquarium gravel with adequate nutrient supplementation. Water parameters suitable for Ludwigia repens include temperatures ranging from 68 to 82°F (20 to 28°C), a pH between 6.0 and 7.5, and soft to moderately hard water conditions. Regular trimming encourages bushier growth and maintains the plant’s compact appearance. Propagation is simple, achieved by trimming the stem and replanting the cuttings in the substrate, where they will quickly develop roots and grow into new plants. Overall, Ludwigia repens (commonly known as Ludwigia repens or Ludwigia ‘Red’) is an attractive, hardy, and versatile plant ideal for both novice and experienced aquarists. Its vibrant colors, ease of care, and adaptability to various conditions make it an excellent choice for adding visual interest and dynamic color contrast in planted aquarium setups.
