Does it need full sun?

No, it prefers partial to full shade.

It can spread by seed but is generally not considered aggressive in garden settings.

Plant guide

Three-nerved sandwort.

Moehringia trinervia

Pronounced meh-RING-ee-ah try-NER-vee-ah

Also known as Apetalous sandwort, Three-Nerved Sandwort

Three-nerved Sandwort — Photo by Dorte Stokholm (CC BY) via iNaturalist

This charming little woodland plant is a member of the carnation family. It thrives in damp, shaded spots and adds a delicate touch to naturalistic gardens. You will often find it carpeting the forest floor in its native range.

At a glance

Care level: Moderate
Plant type: Annual or biennial herb, sometimes a short-lived perennial
Light: Partial shade to full shade
Indoor light: Medium light
Water: Every 3 to 7 days
Mature size: 15 to 30 cm
Growth rate: Medium
Hardiness: USDA 4 to 8
Bloom time: Late spring to mid summer

Care

Keep the soil consistently moist to mimic its natural woodland habitat. Watch for wilting, which indicates the plant is drying out too much. Provide dappled shade to prevent the foliage from scorching.

Watering: Keep the soil damp but never waterlogged.
Feeding: Apply a balanced liquid fertilizer sparingly during the growing season.
Pruning: Trim back spent flower stems to keep the plant tidy.
Repotting: Repot when the plant becomes rootbound or the soil loses its structure.
Soil: Moist, humus rich soil
Soil pH: Neutral to slightly acidic
Temperature: -20 to 30°C
Humidity: 50 to 80%

Safety

People: There are no known significant toxicity issues for humans, but it is not a food plant.
Children: The plant is not known to be a choking hazard or toxic, but children should be discouraged from eating wild plants.
Edibility: This plant is not considered edible and should be avoided for consumption.

How to identify it

Small white five petaled flowers
Oval leaves with three prominent veins
Slender stems that often sprawl
Opposite leaf arrangement on stems

Height: 0.1 to 0.4m
Spread: 0.15 to 0.3m
Leaves: bright green, deciduous
Flowers: white, 0.5 to 1cm

Problems to watch for

Slugs · Slugs may feed on the tender foliage during damp weather.

By symptom

Plant problems by symptom

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Growing it

Propagation: seed
When to plant: spring, autumn

Plant this in groups under deciduous trees to mimic its natural woodland habitat.

Grows well with

Wood Anemone · They share similar requirements for moist, shaded woodland soil.
Common Ivy · It provides a nice textural contrast in shaded areas.

Similar species

Sandwort · It is a related plant that also features small white flowers.

Science

Family: Caryophyllaceae
Genus: Moehringia
Order: Caryophyllales
Class: Magnoliopsida
Native range: Europe and parts of Asia.
Conservation: It is common throughout its range and not of conservation concern.

It thrives in moist, shaded woodland soils where it acts as a low growing ground cover.

Value to wildlife: nectar source
Pollinators: bees, butterflies
Uses: ground cover, woodland garden plant

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 6/9
Light: 3/9
Temperature: 4/9
Moisture: 6/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need full sun?: No, it prefers partial to full shade.
Is it invasive?: It can spread by seed but is generally not considered aggressive in garden settings.

Where the name comes from

The genus honors the German physician and botanist Paul Heinrich Gerhard Moehring, while the species name describes its three-veined leaves.

Good to know

It is a member of the Caryophyllaceae family, just like garden carnations.
It prefers the dappled shade of deciduous woodlands.
The plant often self seeds readily in favorable conditions.

Also in

Plants for shade

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This guide was generated with AI on October 19, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.