Does it need standing water?

It prefers very damp soil but does not require constant submersion.

Can I grow it in a regular garden bed?

Only if you can maintain consistently high moisture levels throughout the growing season.

Plant guide

Common marsh bedstraw.

Galium palustre

Pronounced GAL-ee-um pal-US-tree

Also known as Common Marsh-bedstraw, common marsh bedstraw, Marsh-bedstraw, Marsh Bedstraw

Common Marsh-bedstraw — Photo by Tom Norton (CC BY) via iNaturalist

This charming plant loves to hang out in wet, marshy spots. It is a sprawling perennial that adds a delicate touch to damp garden edges. You will often find it creeping along the ground or supporting itself on other vegetation.

At a glance

Care level: Easy
Plant type: Herbaceous perennial
Light: Full sun to partial shade
Indoor light: Bright indirect
Water: Every 1 to 3 days
Mature size: 2 to 3 feet
Growth rate: Medium
Hardiness: USDA 3 to 9
Bloom time: Late spring to mid summer

Care

Keep the soil consistently moist to mimic its natural wetland habitat. Watch for wilting if the ground dries out too much. It spreads easily, so keep an eye on it if you want to contain its growth.

Watering: The soil should never be allowed to dry out completely.
Feeding: A light application of balanced fertilizer in spring is plenty.
Pruning: Trim back dead stems in late autumn or early spring.
Repotting: Repot if the plant becomes too crowded in its container.
Soil: Wet, boggy, or heavy clay soils
Soil pH: Neutral to slightly acidic
Temperature: -25 to 30°C
Humidity: 60 to 95%
Drought tolerance: Low
Lifespan: Perennial, typically 3 to 5 years
Deer and rabbits: Moderate

Signs it needs repotting

Roots growing out of the drainage holes
Stunted growth during the peak season

Safety

People: The plant contains asperuloside and may cause mild gastric distress if consumed in quantity.
Children: Keep away from small children as the bristly stems can scratch delicate skin.
Contact allergens: The stems have tiny, stiff hairs that can cause minor skin irritation upon contact.
Airborne allergens: There is no significant evidence of respiratory allergies associated with this species.
Edibility: This plant is not considered edible and may cause irritation if ingested.

How to identify it

Square stems with rough edges
Small white four petaled flowers
Leaves arranged in whorls
Narrow lance shaped foliage

Height: 0.15 to 0.6m
Spread: 0.2 to 0.4m
Leaves: green, deciduous
Flowers: white, 0.2 to 0.4cm
Fruit: black, Late summer

Problems to watch for

Aphids · Small insects that may cluster on the stems during dry spells.

By symptom

Plant problems by symptom

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Growing it

Propagation: division, seed
When to plant: spring, autumn
Overwintering: The foliage will die back naturally in winter. Simply clear away the dead stems in early spring before new growth appears.
In containers: It grows well in containers if kept in a self-watering pot or a tray of water to ensure the soil never dries out.

Division

1. Carefully dig up a clump in early spring.
2. Gently tease the roots apart into smaller sections.
3. Replant immediately in moist soil.

Group this plant with other moisture-loving species to create a lush, bog-like environment.

Grows well with

Marsh Marigold · They share the same love for wet, boggy soil conditions.
Yellow Flag Iris · It provides a nice structural contrast to the delicate bedstraw.

Similar species

Cleavers · It is a related species but is much more aggressive and has larger, stickier fruits.

Science

Family: Rubiaceae
Genus: Galium
Order: Gentianales
Class: Magnoliopsida
Native range: Widespread across Europe, temperate Asia, and parts of North America.
Conservation: It is common throughout its range and not of conservation concern.

It grows in wet meadows and marshes, using its weak stems to scramble over taller plants for light.

Value to wildlife: nectar source
Pollinators: bees, beetles
Uses: wetland restoration, bog garden filler, ground cover

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 5/9
Light: 6/9
Temperature: 4/9
Moisture: 8/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need standing water?: It prefers very damp soil but does not require constant submersion.
Can I grow it in a regular garden bed?: Only if you can maintain consistently high moisture levels throughout the growing season.

Where the name comes from

The genus name Galium comes from the Greek word gala, meaning milk, as some species were historically used to curdle milk. The specific epithet palustre refers to its preference for marshy or swampy habitats.

Good to know

It is commonly known as marsh bedstraw.
The plant often uses its hooked hairs to climb over other vegetation.
It is a reliable indicator of moist, nutrient-rich soil conditions.

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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.