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Isoetes duriei

Isoetes duriei · Isoetaceae

The gardener's calendar

The right move for September

Ideal time to plant isoetes duriei: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Common name
Durieu's Quillwort
Family
Isoetaceae
Plant type
Aquatic to semi-aquatic herbaceous plant
Foliage
Evergreen, basal rosette form
Mature size
10 to 30 cm in height
Natural habitat
Wetlands, lakes and shallow watercourses in Europe
Hardiness
Very hardy, suited to temperate climates
Growth rate
Slow

Care

Light exposure

Isoetes duriei thrives in bright to partially shaded conditions. Place it at the edge of ponds or wetland areas where it receives at least 4 to 6 hours of daily light. Insufficient light will slow its growth.

Watering and aquatic environment

This plant is naturally semi-aquatic and requires constantly moist substrate, even partially submerged. In a pond, place it in shallow water (5 to 15 cm deep). Outside a pond, keep the soil moist without excessive waterlogging.

Substrate and soil

Choose a substrate rich in organic matter, slightly acidic to neutral. A mixture of potting soil and sand works well. In a pond, use muddy substrate or special aquatic plant soil.

Fertilization

Isoetes duriei generally requires no regular fertilizer in natural or semi-natural conditions. If growth stalls, apply a light diluted aquatic plant fertilizer in spring, without overdoing it.

Pruning and maintenance

This plant requires no regular pruning. Simply remove dead or damaged leaves to maintain the rosette's appearance. Annual spring cleanup is sufficient.

Pests and diseases

Isoetes duriei is rarely affected by pests or diseases in optimal conditions. With prolonged excess moisture or stagnation, watch for algae growth or rot. Ensure good water circulation in your pond.

Did you know?

Quillworts are among the oldest vascular plants on Earth, appearing over 300 million years ago. These small aquatic herbaceous plants are the last living representatives of an evolutionary lineage that dominated Paleozoic ecosystems, making them remarkable living fossils for botanical science.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.