Cranberries are an exciting and healthy berry to grow in the garden. Although they grow wild on bogs in almost all of Sweden, cranberries are uncommon in our gardens – which is a shame, since they are both decorative and rewarding to grow.
The cranberry plant is a low, evergreen ground cover with pink flowers in summer and bright red berries in autumn. The berries are full of vitamin C and antioxidants and have a fresh, tart flavour. Growing your own cranberries gives you not only a beautiful plant but also a harvest of healthy berries for jam, cordial, baking or as a tart element in cooking.
Climate zone – where can you grow cranberries?
Wild cranberries grow in almost the whole country and are very cold-hardy, so you can grow cranberries outdoors in large parts of Sweden if they get the right conditions. To get a good harvest of large-fruited American cranberries, cultivation is, however, easiest in southern and central Sweden, roughly up to growing zone III. In these milder regions, cranberry plants thrive and overwinter without problems. Further north it is possible to succeed, but in the coldest parts extra winter cover may be needed to protect the plants.
Soil and pH – the right soil for cranberries
Cranberries need acidic soil. The soil should have a low pH value (about 4–5) and be humus-rich, moisture-retentive and preferably nutrient-rich. In nature, cranberries grow on mosses and bogs, so try to mimic these conditions in the garden.
If your garden soil is calcareous or clayey, you need to create an acidic bed for the cranberries. Dig a shallow pit (20–30 cm deep) and lay a piece of ground fabric or plastic at the bottom to retain moisture. Then fill the pit with lime-free peat or rhododendron soil mixed with a little sand. Top the surface with a few centimetres of sand or gravel – this helps retain moisture and reduces weeds. Avoid adding any lime, as it raises the pH value.
Cranberries can advantageously be grown in the same bed as other acid-loving plants. For example, they thrive excellently as ground cover under American blueberry bushes, as both want similar conditions.
Planting – when and how to plant cranberries
Preferably plant cranberry plants in spring when the risk of frost is over, so that they have time to establish before winter. In southern and central Sweden this most often means April or the beginning of May. It is also possible to plant in early autumn, but avoid putting out plants just before the ground freezes, as they will not have time to root properly.
Set the plants shallowly, at about the same depth as they stood in the pot. A planting distance of about 20–30 cm works well if you want the runners eventually to form a dense mat. Dig a hole just large enough for the root ball and firm the soil lightly around the plant. Water generously after planting so that the soil closes around the roots. Cover the planting area with a thin layer of sand or bark mulch to retain moisture.
Care – watering, mulching, fertilising and pruning
Watering: Keep the cultivation evenly moist – the soil should never dry out completely. Water regularly, especially during dry periods, but make sure excess water can drain away so the roots do not stand in wetness.
Mulching: Preferably mulch around the cranberry plants to preserve soil moisture. A layer of sand, gravel or bark mulch on top of the soil helps retain moisture and suppresses weeds. In colder areas you can cover the plants with spruce branches or horticultural fleece in winter as extra protection if the snow cover is thin.
Fertilising: Cranberries have low nutrient requirements. If the plants grow poorly, you can add a little fertiliser for acid-loving plants (for example rhododendron fertiliser) in spring, but avoid over-fertilising since too much nutrition can raise the pH value.
Pruning: No regular pruning is needed. The plant spreads low with trailing runners; cut away damaged or dry parts in spring if needed. If the growth spreads too much, you can trim the edges gently to keep it in place.
Harvest and use – when and how to make use of the cranberries
Cranberries ripen late in the season. Most berries are ready to harvest from the end of September to October. One tip is to wait until after the first night frost to pick – a little frost can soften the berry’s sharp acidity so that the taste becomes somewhat sweeter. You can pick cranberries right up until the snow comes; the red berries are firm and often remain on the plant. Sometimes you find leftover berries the next spring after the snow melts.
Cranberries are versatile in the kitchen. The berries’ intense tartness works best together with something sweet or in dishes where they add a fresh element. Cook cranberry jam or jelly – perfect with game meat, poultry or as a tart spoonful on breakfast porridge. Cranberry cordial or juice is another tasty option; blend the berries with water and a little sugar for a refreshing drink. You can also dry cranberries to get tart “raisins” for muesli or baking. Freeze fresh cranberries and you have berries all year round – they can be used directly in smoothies or desserts for a vitamin C-rich boost. Cranberries are considered, thanks to their nutrient-rich content, a real superberry – growing them yourself provides both joy and a healthy harvest.
Author: Emma Vogiatzi - trained gardener
Fact-checked by: Erik Hoekstra
Last updated 2026-01-15