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Carolina water-shield
Also known as: Fanwort, Green cabomba, Washington grass
Other names for carolina water-shield (Cabomba caroliniana) include Washington grass, green cabomba, fanwort, fish grass, and Carolina fanwort. This aquatic plant is native to the Americas, and people living where it grows often eat it. It cannot thrive in fast-moving water. So, look for it in stagnant ponds, trickling streams, and quiet lakes.
Scientific classification
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Perennial
Lifespan
Herb
Plant Type
Late spring, Summer, Early fall
Bloom Time
White, Yellow, Purple
Flower Color
Deciduous
Leaf type
5 - 38 ℃
Ideal Temperature

Images of Carolina water-shield

Distribution of Carolina water-shield

Distribution Map
Carolina water-shield is native to South America and has been introduced to parts of Asia, Europe, and Oceania. While it is cultivated, in certain areas where it is non-native, carolina water-shield is sometimes thought to be potentially invasive, though it may have an impact on local ecosystems. The species' presence spans multiple continents, indicating its adaptation to a variety of climates and conditions.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Acidic to alkaline ponds, lakes, rivers, streams, ditches, canals and reservoirs
Hemisphere Trend Curve

Weed Control

Carolina water-shield is a perennial aquatic plant which is considered weedy and invasive in certain parts of the world.
How to Control It
If you found carolina water-shield in your pond and want to get rid of it, the best option is to use mechanical methods of removal, like raking, seining, cutting, pulling, etc., in combination with phytoplanktons. Mechanical removal will need to be repeated a number of times during summer, because the plant will regrow from the remaining roots and seeds. Carolina water-shield can be controlled by exhausting the remaining plants with regular raking, and by introducing or stimulating the growth of phytoplanktons that help to prevent the development and further establishment of this type of weed. The use of herbicides in aquatic environments is not advised, because it is impossible to avoid affecting non-target species.
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Care Guide for Carolina water-shield

Every week
Water
Full sun
Sunlight
5 - 38 ℃
Ideal Temperature
Potting Mix, Garden Soil
Soil Type
Water: Carolina water-shield thrives in aquatic environments, preferring consistent moisture and tolerating brief dry spells. Routine watering once a week is essential for optimal health. This evergreen plant, usually found outdoors, relies on steady water availability for its year-round foliage.
Fertilize: For carolina water-shield, use balanced fertilizers monthly during spring and summer, reducing frequency in fall. Follow dosage instructions to avoid nutrient overload, ensure even distribution in the aquatic habitat, and apply near the root zone to enhance vitality and maintain a healthy environment.
Pruning: Carolina water-shield is a fast-growing aquatic plant with finely divided leaves, requiring optimal pruning between early to late spring. Techniques include trimming stems and removing damaged foliage, promoting healthy regrowth, preventing overcrowding, improving water circulation, enhancing aesthetics, and reducing invasiveness.
Propagation: Carolina water-shield is a freshwater aquatic plant with feathery leaves, thriving in home aquariums or ponds. Propagate via stem cuttings by replanting trimmed healthy stems in substrate with adequate light and nutrients. Stable water conditions promote root establishment and growth, enhancing underwater density.
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