Photos of this Tropica reference. Appearance may change after immersion.
Tropica
Spirodela polyrrhiza
Spirodela polyrrhiza · Botanical family: Araceae
Small fronds for a living surface.
Floating Growth
Not specified for this reference Height
3 - 5+ cm
1 cup · In-vitro
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Floating
Picture its place. Understand its size.
Spirodela polyrrhiza floats freely as small rounded fronds. Rapid multiplication creates useful shade in some layouts but can quickly cover the tank. It draws nutrients from the water and mainly needs regular thinning.
Tropica guide after roughly two months. “+” means the plant may exceed this height; it is not an adult maximum.
The supplied cup · In-vitro
What it needs. And why.
Light
LowKeep the plant lit without aiming for maximum intensity. Lighting duration does not replace the intensity reaching the leaves.
CO₂
LowFollow the guidance for this floating plant; surface leaves have access to air. Injection does not replace light or nutrition.
Nutrition
Nutrients are taken from the water. Monitor growth and thin the surface to maintain balance with submerged plants.
All parameters and their sources
- Botanical family
- Araceae
- Listed origin
- North America
Temperature, pH and hardness: this Tropica reference does not publish numerical ranges.
Needs and numerical guides come from the cited Tropica reference. Placement and layout advice are suggestions from Sousleau. Missing values are not inferred from a different species.
Read this plant’s Tropica profile ↗Tropica · 131 TC
From the cup to your layout.
A few steps suited to this plant for a good start.
1Rinse off the growing medium
Gently remove the plant from its cup and rinse off the culture gel before placement.
2Divide gently
Prepare small healthy portions without crushing leaves, stems or roots.
3Let it float
Place portions freely in the water, at the surface for surface-floating plants. Do not bury them.
Pruning and ongoing care
Remove some fronds frequently and keep openings above plants needing more light.
Understanding acclimatisation
An In-vitro cup contains young plants. Shape, colour and size can change after immersion. Watch new growth, remove deteriorating parts and keep conditions stable. Report plants damaged on arrival; acclimatisation does not explain every problem.