Knotted pearlwort
Sagina nodosa · Caryophyllaceae
The gardener's calendar
Ideal time to plant knotted pearlwort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Evergreen, fine and needle-like
- Flowering
- June to August, small white flowers
- Adult size
- 10 to 20 cm in height, spreading habit
- Growth
- Slow
- Hardiness
- Hardy, down to -15 °C
- Origin
- Temperate and subarctic zones of Eurasia
- Soil type
- Moist, well-drained, slightly acidic
Care
Watering
Keep the soil consistently moist but without waterlogging. During the growing season, water regularly so the soil stays fresh. Reduce watering in winter, while maintaining minimal moisture.
Light exposure
Prefer semi-shade or partial shade. Knotted pearlwort also tolerates full sun in cold regions, but appreciates protection from intense heat in warm climates.
Soil and compost
Use a substrate rich in organic matter, humus-rich and well-drained. A mixture of acidic potting soil with peat or crushed bark works perfectly. This plant loves slightly peaty soils.
Fertilizer
Apply a balanced diluted fertilizer every 15 days during the growing season (spring-summer). Moderate fertilization is sufficient; this small plant doesn't require heavy feeding.
Pruning and maintenance
Pinch the stem tips to encourage a compact and bushy habit. Remove dead or bare parts in spring. Light pruning is usually sufficient.
Diseases and pests
Watch for root rot if there is excess moisture or poor drainage. Pests are rare on this species. Good air circulation prevents fungal problems.
Did you know?
Knotted pearlwort owes its common name to the small characteristic knots that appear on its delicate stems. In the past, it was valued in alpine gardening and rock gardens for its miniature habit and delicate white flowers, forming small dense cushions typical of cold mountainous areas.
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.