Arenaria montana
Mountain sandwort (Arenaria montana) is a ground cover plant that reaches 10 cm × 45 cm after ten years. Light: full sun, part shade. Hardy down to -34 °C. Drought tolerance: medium. Sold in local shops from about PLN 13.
It forms a low, evergreen, fresh green cushion that in late spring almost disappears under pure white flowers that are strikingly large for the size of the leaves. Use it in a rock garden, on top of a retaining wall, between stepping stones or in a pot, in sun or light part shade. It needs soil that drains well but does not dry out: it roots shallowly, so water it in summer dry spells.
| Group | Ground cover |
| Light | Full sun, Part shade |
| Size after 10 years | 10 cm × 45 cm |
| Ultimate size | 5–10 cm × 25–50 cm |
| Hardiness | down to -34 °C (USDA 4, RHS H7) |
| Soil | Average garden soil, Sandy, Calcareous |
| Foliage | Evergreen |
| Flowering | May–June, white |
| Water need | Medium |
| Drought tolerance | Medium |
| Maintenance | Low |
| Root aggressiveness | Low |
| Suckering | no data |
| Spreading | Low |
| Distance from buildings | no data |
| Distance from paving | no data |
| Litter | not typical |
| Planting distance | 25 cm |
| For dogs | no data |
| For cats | no data |
| For children | no data |
| Typical price | from about PLN 13 |
Toxicity data is for information only. If your pet or child has eaten a plant, contact a vet or a doctor.
The same plant is sold as a small pot and as a specimen several metres tall, and the price follows. Prices are rounded and for guidance only.
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Size
|
Typical price
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|---|---|
| size not stated | approx. PLN 13 |
Data updated: October 17, 2026 · How our data is made
Ground cover plants against weeds: which goes where, and how many you need
A ground cover keeps weeds out once it has closed up: until then, usually for two or three summers, it needs mulch and weeding. Under trees and in shade, lesser periwinkle, bigroot geranium, barrenwort and barren strawberry do best; in sunny, dry places stonecrops, thymes and creeping junipers. Most perennial ground covers take 9-18 plants per square metre. The tables work out what a square metre costs at today's shop prices in your country.
Building a rock garden: stone, soil and plants step by step
A rock garden belongs on a sunny, gentle slope, in lean, free-draining soil: one third garden soil, one third coarse sand, one third crushed stone. Lay the stones, all of one kind, in layers leaning the same way and sunk a third to a half into the ground, so that about two fifths of the surface is stone. Four to six plants per square metre are enough: creeping junipers and grasses make the frame, and between them cushion perennials, stonecrops and thymes flower from March to October.
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