Black Crowberry

Empetrum nigrum is a low-growing, mat-forming evergreen shrub native to tundra, heathlands, and boreal forests across the Northern Hemisphere. It produces small, glossy, purple-black berries that are a significant food source for wildlife and humans in Arctic and subarctic regions. For gardeners in cold climates, it is among the most cold-hardy groundcovers available, surviving zones as cold as 2a.

The plant spreads by layering and forms dense mats that suppress weeds in acidic, peaty, or rocky soils. It tolerates exposed, windswept sites where few other plants survive. Soil pH should be kept between 4.0 and 5.5; organic mulch such as pine bark or shredded leaves helps maintain acidity and moisture retention. Propagation is most reliable from semi-hardwood cuttings taken in early summer; seed germination is slow and erratic.

The berries are edible and have been harvested for centuries by Arctic Indigenous peoples - including Iñupiaq, Inuktut, Tlingit, Haida, and Dena'ina communities - for fresh eating, incorporation into akutaq (a traditional fat-and-berry preparation), and making jams and juice. The fruit is high in anthocyanins. Decoctions of the plant have traditionally been used for kidney and urinary complaints.