Spirodela polyrhiza (L.) Schleid.

• Genus: Spirodela
• Botanical Background: First described by Linnaeus and later revised by Schleid., this species has been a subject of botanical research for its unusual adaptation to aquatic environments and its efficient reproduction strategies.

• Geographical Range: Temperate zones in Europe and Asia and tropical areas worldwide
• Environment: Prospers in nutrient-rich, calm water environments with moderate to high humidity; tolerates a range of water temperatures and can often be found in eutrophic conditions.

Leaves

• Simple, oval-shaped fronds
• Typically bright green with a smooth texture

Inflorescence (Spadix & Spathe)

• Flowering is rare
• Lacks prominent spathe or spadix structures

Growth Habit

• Strictly aquatic and floats on the water surface
• Reproduces primarily by budding off new fronds from a rapidly expanding mother plant

Light Requirements

• Bright, indirect light that supports healthy photosynthesis

Watering & Humidity

• Constant access to clean, still water
• Does well in environments with high humidity
• Regular water quality checks can help prevent algae overgrowth

Soil & Potting Mix

• Traditional potting mixes are not applicable
• Cultivation occurs in containers or ponds filled with water

Temperature & Fertilizer

• Optimal growth occurs in water temperatures between 15°C and 30°C
• Diluted liquid feed applied monthly during the growing season to maintain nutrient balance.

Division

• Propagation method is vegetative reproduction

Stem Cuttings (if applicable)

• New fronds develop from the mother plant, which can be gently separated to expand a colony in controlled settings

Seeds

• Seed production is rare
• Generally less viable than vegetative fragments

Typical Issues

• Relatively pest-free, though it can occasionally experience issues with algae or fungal growth

Treatment Recommendations

• Regular water changes and ensuring proper spacing.
• Safe chemical treatments and organic methods such as introducing beneficial microorganisms

• Highlighted in ecological studies due to its rapid growth and ability to absorb excess nutrients from water.
• Unique appearance and utility in sustainable water management.

Wild Population Status

• Widespread in its native range; abundant in appropriate freshwater habitats

Market Availability

• Commonly available through aquatic plant suppliers and is frequently used in research and ecological restoration projects