A living carpet that looks like moss but loves the sun. Heath pearlwort is a ground-covering perennial only a few centimetres tall, forming dense, compact, lush green cushions. In summer, they become covered with masses of tiny, star-like white flowers. In England, it is called “Irish moss” – and it really does behave like moss, only it is much more resilient.
At a glance
- Height: 3–5 cm
- Flowering: June – August
- Position: sunny or partial shade
- Sowing under cover: April – May
- Planting out: June – August
- Difficulty: easy – seeds are very small, surface sowing
- Number of seeds per packet: approx. 600 (0.03 g)
What makes this variety special
Heath pearlwort grows flat and densely, forming a turf that fills every gap. It is evergreen and fully frost-hardy, and it also tolerates moderate foot traffic – it can be planted between paving slabs or garden steps. Unlike true moss, it does not need shade and moisture; it thrives best in the sun, in well-drained soil.
The white, single flowers are tiny, but they appear in such abundance that in June and July the cushions look as if they have been sprinkled with sugar. After flowering, the turf remains smooth and dense until winter, then starts growing again in spring – without mowing, fertilising or maintenance.
Growing step by step
Sowing (April – May, under cover): the seeds are powder-fine, so mix them with dry sand for even sowing. Sow them in trays or plug trays on the surface, without covering them – simply press them into the growing medium with a board. At a temperature of 16–20°C, seedlings emerge after 10–14 days. Water gently by misting or from below so that the seeds are not washed away.
Pricking out: do not separate the seedlings individually – after 4–5 weeks, cut out small clumps from the sowing and plant them in plug trays or 6 cm pots. Each clump quickly grows into a compact cushion.
Planting out (June – August): plant in the permanent position 15–20 cm apart – the clumps grow together into a uniform carpet within a single season. The soil should be well drained but not poor, and the position sunny or lightly shaded.
Care: heath pearlwort has a shallow root system, so water regularly during hot weather, but do not waterlog it – standing water causes the centre of the cushion to rot. When the turf begins to lift after several years, cut out a section and press the remaining parts back into the soil. Established clumps can be divided in spring and used to plant new areas.
Uses
A classic plant for filling gaps between paving slabs and stones, for the rock garden, slopes and path edges. It works well as a lawn substitute for small areas that do not need mowing, as underplanting beneath bonsai trees and in pots, as well as in Japanese-style gardens and miniature gardens. In compositions, it provides a calm, green backdrop for rock plants with colourful flowers.
Gardener's tip
Heath pearlwort seeds are so tiny that 0.03 g contains several hundred seeds. Sow them on the surface of moist growing medium and cover the tray with plastic film or a pane of glass until germination – even moisture is more important than warmth. Remove the cover immediately after emergence, otherwise the seedlings will start to develop mould.
Specifications
| Latin name | Sagina subulata |
| Flower colour | white |
| Height | 3–5 cm |
| Position | sunny or partial shade |
| Seasonality | evergreen perennial |
| Sowing period under cover | April – May |
| Planting-out period | June – August |
| Flowering period | June – August |
| Spacing | 15–20 cm |
| Net weight | 0.03 g (~600 seeds) |
| Series | Traditional |
| Producer | W. Legutko |
| EAN code | 5903837304004 |