Pilularia globulifera
Pilularia globulifera · Marsileaceae
The gardener's calendar
Ideal time to plant pilularia globulifera: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Semi-evergreen, deciduous depending on climate
- Adult size
- 5 to 15 cm in height
- Growth
- Slow to moderate
- Hardiness
- Hardy (-10 to -5 °C)
- Origin
- Western Europe, North Africa
- Habitat type
- Wetlands, banks, peaty soils
Care
Watering
Pillwort is an aquatic fern that appreciates permanently moist to very wet substrates. In a pond or marshy area, regular watering is rarely necessary as the natural environment naturally retains its moisture. In a pot, keep the substrate very moist (soil always wet) and check daily.
Light exposure
Prefer partial shade or dappled shade, mimicking the natural banks and semi-aquatic zones where it grows. It also tolerates shadier areas; however, direct and prolonged full sun can dry out the foliage. Favor a humid atmosphere protected from strong winds.
Soil and substrate
Opt for a peaty, muddy substrate or one very rich in organic matter, like that found in natural wetlands. A mixture of brown peat, sphagnum moss and coarse sand works perfectly. pH should remain slightly acidic to neutral. Avoid well-draining or chalky substrates.
Fertilizer
Fertilizer is generally not essential if the substrate is rich in organic matter. In a pot, very diluted liquid fertilizer applied in spring can support growth. Favor organic additions or natural fertilizers rather than synthetic ones.
Pruning and cleaning
No pruning is required for this small fern. Simply remove dead or damaged fronds as needed to maintain a neat appearance. Regular foliage cleaning will prevent dust accumulation in an enclosed environment.
Diseases and pests
Pillwort is generally robust and not very susceptible to pests in natural conditions. In overly dry or poorly ventilated pots, spider mites or scale insects may appear. Maintain good air circulation and stable humidity to prevent these issues. Inspect foliage regularly.
Did you know?
Pillwort gets its name from its "pills" — small round structures resembling beads that contain its reproduction spores, visible beneath the fronds. Unlike most ferns, this species is semi-aquatic and has long fascinated botanists because it recalls the life cycle of flowering plants while remaining an ancient and primitive fern.
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.