Nymphaea lotus 'grün'

Geographical Origin and Habitat: Nymphaea lotus originates from the tropical and subtropical regions of Africa and Southeast Asia, where it thrives naturally in still or slow-moving waters such as lakes, swamps, and ponds. The 'grün' cultivar maintains the adaptability of the wild species, flourishing in stable aquatic conditions. Despite its wild origins, this specific green variety has been selectively bred for its particular

Color & Texture: ation and forms, making it a popular choice for tropical aquariums. Its natural habitat is characterized by nutrient-rich substrates and abundant sunlight penetrating shallow waters.

Taxonomy & Genetics: Nymphaea lotus 'grün' belongs to the Nymphaeaceae family, an ancient group of aquatic plants renowned for their showy flowers and floating leaves. Nymphaea lotus is the parent species of many cultivars, and 'grün' denotes a specific horticultural selection characterized by its predominantly green leaves and vigorous growth. Genetically, this cultivar was likely developed to enhance green hues and resilience, distinguishing it from the more common red or mottled variants of the same species. Its classification highlights its nature as a water lily, with a robust rhizome and the ability to adapt to diverse aquatic environments.

Physical Structure: Nymphaea lotus 'grün' develops a robust underground rhizome from which roots and leaf petioles emerge. Its submerged leaves are the distinct characteristic in an aquarium, generally oval or heart-shaped, with sometimes undulated margins. Under suitable conditions, the plant can also produce round floating leaves and, in exceptional cases, a beautiful flower. The size and shape of the leaves can vary depending on light intensity and CO2 availability, with more compact and intense growth under higher light.

Color & Texture: The distinguishing feature of Nymphaea lotus 'grün' is the color of its leaves, which range from a brilliant green to a darker, more intense green, depending on lighting and nutrient conditions. The leaves often have a velvety texture and a smooth surface, with the central vein prominently visible. Occasionally, under severe stress or deficiency, leaves might develop reddish tinges, but the dominant coloration remains green. This vibrant hue makes it an excellent contrast against red and brown plants in the aquarium.

Lighting & CO2: This

Water Chemistry: lily requires medium to high lighting to fully thrive and maintain compact, robust growth, preventing leaves from excessively stretching towards the surface. Insufficient lighting can slow growth and lead to pale, weak leaves. CO2 injection is highly recommended, especially with intense light, as it promotes rapid and vigorous growth, supporting efficient photosynthesis and preventing the premature formation of unwanted floating leaves. A photoperiod of 8-10 hours per day is generally ideal for this species.

Nutrition & Substrate: Nymphaea lotus 'grün' is a heavy root feeder, absorbing most of its nutrients directly from the substrate via its robust root system. It is essential to provide a fertile, nutrient-rich substrate, such as an aquasoil or a specialized plant substrate enriched with clay and peat. Supplementing with root tabs inserted into the substrate near the roots is highly recommended to ensure a consistent supply of macro and micronutrients. Liquid fertilizers can supplement foliar needs, but primary attention should be given to the substrate for optimal growth.

Water Chemistry: This plant is relatively tolerant regarding water parameters, thriving in a temperature range between 15°C and 30°C, although its optimum is generally between 22°C and 28°C for vigorous growth. Regarding pH, it adapts well to values ranging from 5.0 to 8.0, indicating good flexibility, but prefers slightly acidic to neutral waters. Carbonate hardness (KH) can vary between 2.0 and 14.0, demonstrating its ability to adapt to both soft and moderately hard waters. Maintaining stable parameters is crucial to avoid plant stress, with regular water changes to replenish mineral salts.

Space Management & Placement: Given its fast growth and potentially large leaf size, Nymphaea lotus 'grün' is ideal for the midground, where it can become a dominant focal point. It is crucial to consider the space required for its development, as its leaves can expand significantly and overshadow underlying or surrounding plants. In smaller aquariums, regular

Pruning: Regular pruning is essential to maintain Nymphaea lotus 'grün' in the desired shape and to promote healthy growth. Old, damaged, or yellowing leaves should be removed by cutting them at the base of the petiole with sharp scissors, close to the rhizome. If the plant begins to produce too many floating leaves, which can excessively shade the aquarium, it is advisable to systematically remove them to encourage the growth of smaller, more compact submerged leaves. Judicious pruning also prevents excessive substrate clogging and directs the plant's energy towards vigorous new leaves.

Risks & Diseases: Although a robust plant, Nymphaea lotus 'grün' can be susceptible to nutritional deficiencies if the substrate is not adequately enriched, manifesting as pale leaves or holes. Insufficient lighting can cause leaves to etiolate, becoming elongated and weak. Excess algae can be a problem if nutrients are unbalanced or light is excessive and not balanced with CO2. It is rarely attacked by specific pests, but the presence of snails or herbivorous fish could damage the leaves. Leaf "melting" can occur after transplanting or under stressful conditions, requiring patience for recovery.