Isoetes echinospora
Isoetes echinospora · Isoetaceae
The gardener's calendar
Ideal time to plant isoetes echinospora: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Isoetes echinospora
- Family
- Isoetaceae
- Type
- Submerged aquatic plant
- Foliage
- Persistent, fine and upright
- Natural habitat
- Oligotrophic lakes and waterways of Europe and Asia
- Depth
- 0.5 to 3 meters
- Growth
- Slow
- Hardiness
- Very hardy
Care
Aquatic immersion
The spiny-spored quillwort is entirely submerged and requires permanent immersion in fresh, cold and clear water. It cannot tolerate prolonged emergence or stagnant waters containing excess organic matter. Maintain a depth of 0.5 to 2 meters depending on local conditions.
Light
This plant prefers moderate to good light. It adapts to variable depths but grows best with regular access to natural light filtered through the water. Avoid very turbid waters or those laden with algae, which would reduce light penetration.
Substrate and water
The quillwort anchors itself to mineral substrates with low nutrient content: gravel, sand or poor silt. It prefers oligotrophic waters (nutrient-poor) and well-oxygenated conditions, characteristic of mountain lakes and clear waterways. Eutrophic waters promote the proliferation of competing algae.
Nutritional input
No fertilizer is necessary in a balanced aquatic ecosystem. The quillwort absorbs minerals from suspension and from the substrate. Excessive water enrichment would favor algae and disrupt the environment.
Pests and problems
This plant is rarely subject to disease. Excessive silting of the substrate or water eutrophication can slow its growth. Poorly oxygenated stagnant waters promote unfavorable conditions; maintain healthy water circulation and good oxygenation.
Did you know?
The spiny-spored quillwort is a living fossil: its family, the Isoetaceae, has dominated aquatic ecosystems for over 300 million years. It is one of the last representatives of a lineage that thrived during the Carboniferous period, long before flowering plants emerged.
Where to buy it
Best planted in spring or autumn, away from frost and heatwaves. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September, October.
Add this plant to my garden →Plants from the same family
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Tips generated and checked by Viridia — adapt them to your local climate.