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Columbian watermeal
Also known as: Watermeal
Columbian watermeal (Wolffia columbiana) is an aquatic plant that is found throughout the Americas. It is a simple plant that is rootless and floats near the surface of bodies of water. Columbian watermeal is considered to be the smallest flowering plant in the world, although it rarely blooms and when it does the flowers are usually invisible to the human eye.
Scientific classification
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Perennial
Lifespan
Herb
Plant Type
All year round
Bloom Time
10 - 35 ℃
Ideal Temperature

Images of Columbian watermeal

Distribution of Columbian watermeal

Distribution Map
Columbian watermeal naturally occurs in the tropical and subtropical regions of the Americas. It has since spread to temperate areas of the Western Hemisphere. Introduced populations have established in various parts of Europe, where it has adapted to local conditions but is not native. The distribution of columbian watermeal reflects a progression from its historical, natural range into regions where it has been introduced by human activity.
Native
Cultivated
Invasive
Introduced
No species reported
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Hemisphere Trend Curve

Care Guide for Columbian watermeal

Every week
Water
Full sun
Sunlight
10 - 35 ℃
Ideal Temperature
Water: Columbian watermeal thrives in aquatic environments, requiring constant humidity and ample water. It prefers wet conditions and needs weekly watering for optimal growth. This evergreen plant adapts to various climates and continues growing during the rainy season.
Fertilize: For columbian watermeal, use a balanced fertilizer with equal NPK ratios, applying diluted liquid feed bi-weekly during spring and summer. Reduce fertilization in fall and winter to support growth. Take care to prevent water contamination and follow product guidelines for safe application.
Pruning: Columbian watermeal are small, rapidly growing aquatic plants. Prune in early to late spring to promote healthy regrowth and prevent overcrowding. Regular pruning maintains nutrient balance in the water. Use gentle scooping with a fine mesh net to avoid damage and ensure optimal water conditions for recovery.
Propagation: Columbian watermeal thrives in freshwater, requiring nutrient-rich, pH-balanced water. It propagates vegetatively, rapidly covering surfaces. Disperse small sections in calm, warm waters for growth. With proper care, columbian watermeal establishes quickly, forming a dense carpet of foliage.
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