Screw

Vallisneria natans

Vallisneria natans is an aquatic plant primarily grown in ponds or aquariums. The following is information regarding the plant's growth characteristics, propagation methods, cultivation methods, garden uses, and major pests and diseases, as well as control methods.

Growth Characteristics
- Vallisneria natans thrives best in aquatic environments. It prefers warm temperatures and clean water, with an optimal temperature of approximately 20–28 degrees Celsius.
- While this plant prefers strong light, it can also grow well in moderate light.
- It plays a positive role in improving water quality by helping to remove organic matter from the water.

Propagation Methods
- Vallisneria natans is primarily propagated via runners. Runners are elongated stems that produce new individuals from the parent plant.
- To propagate, select and cut healthy runners, then plant them in a new location.

Cultivation Methods
- Plant in a suitable aquarium or pond, and lay a nutrient-rich substrate on the bottom. - Properly manage light intensity and water temperature to promote rapid growth. Supplying additional CO2 promotes healthier growth.
- Maintain a clean environment by changing the water regularly.

Uses in the Garden- Used to add a natural touch to ponds or aquariums.
- Generally cultivated as an ornamental plant, it provides a good habitat for aquatic animals.
- It possesses water purification capabilities, which can contribute to water quality improvement.

Important Pests and Control Methods
- Generally, pests and diseases do not occur frequently; however, problems may arise if the water is heavily polluted or the environment is unsuitable.
- Excessive algae growth can block light penetration, hindering plant growth. To prevent this, use an algae remover or adjust the frequency of water changes.
- If leaves turn brown or begin to rot, change the water frequently and maintain an appropriate CO2 supply.
- In case of problems, remove diseased leaves to prevent further spread and pay close attention to water quality management. Nasal natans is a relatively easy-to-care-for aquatic plant that can be used not only for ornamental purposes but also for water purification.

Plant Type
Plant Family	Water hyacinth family
Height	30~70cm
Spread
Colors	white
Bloom Period	August~September
Water Needs	well
Exposure	Sunny
Freezing Resistance	-5°C

Jijuhyang Yatamansi
Valeriana jatamansii

Nakdong Nasamal
Vallisneria spinulosa