Science & Nature • Botany

Sweet woodruff

Sweet woodruff is a small, shade-tolerant perennial plant in the coffee family, known scientifically as *Galium odoratum*.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Sweet woodruff is a small, shade-tolerant perennial plant in the coffee family, known scientifically as *Galium odoratum*. It is grown as a ground cover and is noted for its whorled leaves, tiny white spring flowers, and hay-like fragrance when dried. The plant is native to parts of Europe, North Africa, and Asia, and has a long history of culinary and herbal use.

Description

Sweet woodruff is a low-growing perennial with whorled leaves, small white star-like flowers, and a spreading habit. It typically forms mats in shaded, moist sites.

Distribution and habitat

The species is native to northern and central Europe, North Africa, and parts of Asia. It is associated with woodland habitats and is widely cultivated beyond its native range.

Uses

Sweet woodruff has been used as an aromatic herb for flavouring beverages, including May wine, and for potpourri and sachets. It has also been used traditionally in herbal medicine and as a household insect repellent.

Cultivation

Gardeners value sweet woodruff as a durable ground cover for partial to full shade. It spreads by rhizomes and can become vigorous in suitable conditions.

Key facts

Sweet woodruff is a perennial woodland plant in the family Rubiaceae.
It is native to northern and central Europe, North Africa, and parts of Asia.
The plant is valued as a shade ground cover in gardens.
Its leaves and stems have a hay-like scent when dried, due largely to coumarin.
It has been used in traditional herbal preparations and to flavour drinks such as May wine.

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Canadian context

Sweet woodruff is of interest to Canadian gardeners because it is grown as a shade-loving ground cover and is reported to be sparingly naturalized in parts of southern Canada.

Frequently asked questions

What is sweet woodruff?

Sweet woodruff is a small perennial flowering plant, *Galium odoratum*, in the family Rubiaceae, often grown as a shade ground cover.

Where does sweet woodruff grow naturally?

It is native to northern and central Europe, North Africa, and parts of Asia, and is commonly associated with woodland habitats.

Why does sweet woodruff smell like hay when dried?

Its dried leaves and stems have a strong scent associated with coumarin, which gives the plant its characteristic fragrance.

What is sweet woodruff used for?

It is used ornamentally as ground cover and historically for flavouring drinks, potpourri, sachets, and some traditional herbal preparations.

Is sweet woodruff edible?

It has been used as a culinary herb, especially for flavouring beverages, but sources note that large amounts may not be suitable for consumption.

What family does sweet woodruff belong to?

Sweet woodruff belongs to the Rubiaceae, also known as the coffee family.

References

Wisconsin Horticulture — https://hort.extension.wisc.edu/articles/sweet-woodruff-galium-odorata/
Supports: Scientific name, family, native range, former genus placement, fragrance, and non-ornamental uses
NC State Extension — https://plants.ces.ncsu.edu/plants/galium-odoratum/
Supports: Plant type, native range, growth habit, size, spread, and edible flowers
Royal Horticultural Society — https://www.rhs.org.uk/plants/41246/sweet-woodruff/details
Supports: Growth habit, height, leaves, flowers, and seasonal flowering period
Encyclopaedia Britannica — https://www.britannica.com/plant/sweet-woodruff
Supports: Common names, scientific name, fragrance, and use in perfumes, sachets, and beverages
Penn State Extension — https://extension.psu.edu/sweet-woodruff-in-the-garden-and-the-kitchen
Supports: Non-native status, family, size, and use as a groundcover