Aponogeton ulvaceus

Scientific name: Aponogeton ulvaceus

Family: Aponogetonaceae

Usual maximum size in aquariums: 30 - 50 cm (11.81 - 19.69 inch)

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Recommended pH range for the species: 6.8 - 7.7

Recommended water hardness (dGH): 4 - 12°N (71.43 - 214.29ppm)

0°C 32°F30°C 86°F

Recommended temperature: 22 - 25 °C (71.6 - 77°F)

Reproduction of the plant: Seeds

Origin (in the wild): Madagascar

How fast these plants grow: Fast

Recommended substrate: Fine gravel

Demands on lighting: Medium

Ideal placement in a fish tank: Middle

Common Names

• Madagascar Lace Plant (though often confused with Aponogeton madagascariensis)
• Ulvaceous Aponogeton

Origin

Aponogeton ulvaceus originates from Madagascar, where it grows naturally in slow-moving rivers, lakes, and seasonal ponds. In its natural habitat, this species experiences periods of growth and dormancy due to seasonal changes in water levels, which influence its lifecycle. The rich biodiversity of Madagascar provides an ideal environment for this plant, offering nutrient-dense waters and soft substrates.

Growing Conditions

Aponogeton ulvaceus is a fully aquatic plant, meaning it thrives when fully submerged in freshwater aquariums. It is well suited for midground to background placement due to its long, flowing leaves, which can reach between 30 - 50 cm (11.81 - 19.69 inches). This species prefers a stable environment with a pH range of 6.8 - 7.7 and water hardness between 4 - 12 dGH. The ideal temperature for its growth is 22 - 25 °C (71.6 - 77°F).

For best results, plant it in fine gravel substrate, which allows its bulbous tuber to anchor securely while promoting healthy root development. Regular fertilization supports its fast growth, particularly with nutrients such as iron and potassium. While CO₂ supplementation is not required, it can enhance the plant’s overall health and leaf vibrancy.

Lighting Requirements

This species prefers medium lighting, which encourages steady growth without promoting excessive algae formation. Too much light can cause algae to develop on its broad, delicate leaves, while too little light may result in elongated, weaker growth. Providing 8 - 10 hours of moderate-intensity light daily is ideal.

Planting Area

Due to its long, flowing leaves, Aponogeton ulvaceus is best suited for the midground or background of an aquarium. Its wavy, translucent green leaves add a dynamic element to aquascapes, creating a lush and natural aesthetic. When planted in clusters, it provides an excellent contrast to shorter plants, making it a valuable addition to large aquariums.

Propagation

Aponogeton ulvaceus propagates through two primary methods: seeds and tuber division.

• Seed Propagation: In ideal conditions, this plant produces flowers that lead to seed formation. These seeds can be collected and germinated separately to grow new plants, though this method is less common in aquariums.
• Tuber Division: The most common propagation method is by dividing the tuber. When the plant is well-established, small offsets may form around the main tuber. These can be carefully separated and replanted to encourage new growth.

Because this species can undergo a dormant phase, it may occasionally lose its leaves. When this happens, the tuber should be left in the substrate, as new leaves will typically sprout after a resting period.

Difficulty

This plant is considered moderate in difficulty. While its care is straightforward, its fast growth and occasional dormancy require some understanding. Providing stable water conditions, adequate fertilization, and occasional pruning ensures the plant remains healthy and vibrant. Due to its delicate leaves, care should be taken to avoid rough handling, as damage can cause sections to decay.

Short Description

Aponogeton ulvaceus is a stunning, fast-growing aquatic plant known for its long, flowing, and ruffled leaves that bring movement and elegance to freshwater aquariums. Its ability to adapt to a range of water conditions makes it a favorite among aquarists, while its bulbous tuber ensures strong root development. Under proper care, this plant will grow rapidly, creating a lush underwater landscape. Given enough space, it may even bloom with small, delicate flowers.

This plant is an excellent choice for both planted aquariums and biotope setups, adding a unique, natural aesthetic while providing shelter for fish and invertebrates. With its beautiful, wavy leaves and graceful growth, Aponogeton ulvaceus is a striking addition to any well-maintained tank.