groundcoverN. America Native

Procumbent Pearlwort

Sagina procumbens

The Story

Plant Bio

Sagina procumbens, commonly known as procumbent pearlwort, is a low-growing, mat-forming perennial that produces dense, moss-like carpets of bright green foliage. The thread-like, linear leaves are opposite and fused at the base, bearing minute, greenish-white flowers on slender stalks that nod during budding and seed ripening.

This species spreads via trailing stems that branch densely and root at the nodes, allowing it to quickly colonize rocky crevices, sandy soils, and pavement cracks. It is highly tolerant of coastal salt spray and sub-arctic cold, though it requires continuous moisture to prevent the mat from drying out.

Uses & Benefits:

Forms a tight, bright green, moss-like carpet that fills gaps between stepping stones and pavers.

Highly tolerant of foot traffic, coastal salt spray, and sub-arctic cold, stabilizing soil in rocky or sandy areas.

Provides minimal direct wildlife value, though small ground birds and insects occasionally interact with the dense mats.

Essentials

At a Glance

Plant Type

Groundcover

Height

Width

24"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

High

Humidity

Moderate

Lifespan

Perennial

Native To

Europe, Asia, North America

Toxicity

Non-toxic

Bloom period

Spring – Fall

In flower about 9 months of the year

Planting

How to Grow

Select a site with full sun to partial shade and moist, sandy, loamy, or rocky soil.
Space plugs six to twelve inches apart to allow the trailing stems to spread and root at the nodes.
Water regularly to maintain continuous soil moisture, especially during hot, dry summer spells.
Manually edge the mats if they begin to encroach on lawns, garden borders, or paved pathways.

Pro Tip

Plant in a cool, moist environment with sharp surface drainage; while this species tolerates periodic surface wetness, planting it in heavy, waterlogged shade causes the root system to rot and melt out.

Keep It Thriving

Care Guide

Do

Keep the soil continuously moist to prevent the shallow root system from drying out.
Provide sharp surface drainage to prevent root rot during periods of heavy rain.
Manually weed or edge the mats to control their spread into adjacent garden beds.

Don't

Do not fertilize, as excess nutrients encourage weak, lush growth and invite weed competition.
Do not cut back hard into old, leafless wood when trimming or edging.
Do not plant in permanently waterlogged muck or heavy, poorly drained clay.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Pest Check
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rock gardensPath pathways and flagstone crevicesCoastal gardensGroundcover mats

Companion Plants

Thymus serpyllum Mazus reptans

Multiply

Propagation Methods

Good to Know

Common Questions

Procumbent Pearlwort questions

What zones can Procumbent Pearlwort grow in?

Procumbent Pearlwort is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Procumbent Pearlwort bloom?

Procumbent Pearlwort typically blooms in spring through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Procumbent Pearlwort need full sun?

Procumbent Pearlwort does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.