Hygrophila rosanervis

Hygrophila rosanervis, widely known as marble hygrophila, is an attractive aquarium plant belonging to the Acanthaceae family. It is distinct for its striking foliage, where the leaf veins display a cream-white or light pink pattern against a bright green background, creating a high-contrast visual effect highly sought after by aquascapers.

Originating from the tropical regions of Southeast Asia, this species naturally thrives in wetlands and riparian zones. In an agricultural and horticultural context, it is propagated for the aquarium trade. It behaves as an amphibious plant, capable of growing both submerged and emerged, although its most vibrant colors are typically observed in submersed aquarium conditions.

Botanically, the plant features an upright growth habit with opposite leaf arrangement. As it matures, the plant produces numerous side shoots, allowing it to form dense clusters. The specific veining pattern is a form of variegation that requires high light intensity and proper nutrition to maintain its distinct aesthetic appeal throughout the life cycle of the plant.

The cultivation requirements focus on providing a stable aquatic environment. Ideal parameters include a temperature range of 22–28°C and soft to medium water hardness. Unlike many low-light species, Hygrophila rosanervis benefits significantly from CO2 injection and a nutrient-rich substrate, which helps prevent the leaves from losing their characteristic marble patterns.

• Requires moderate to high light levels.
• Thrives in nutrient-dense aquatic soils.
• Benefits from regular potassium and iron supplementation.
• Requires frequent pruning to maintain a bushy shape.

Common issues in cultivating this species include deficiency signs such as pale leaves or stunted growth, which are usually corrected by adjusting micronutrient dosing. Pest management is rarely an issue in controlled aquarium environments, though invasive algae can sometimes settle on leaves if the nutrient balance is not carefully monitored during the plant's growth phase.