Key Facts
- Evergreen conifer that grows as a shrub or small tree
- Native across the cool temperate Northern Hemisphere
- Produces berry like cones commonly called juniper berries
- Usually dioecious with separate male and female plants
- Tolerant of poor and dry soils and of exposed sites
- Prefers full sun and good drainage
- Used for hedging, groundcover, windbreaks and erosion control
- Berries are used as a culinary spice and to flavor gin
- Provides food and cover for birds and other wildlife
Juniper is an evergreen conifer that grows as a shrub or small tree and is valued for tough, low maintenance landscaping. It tolerates poor and dry soils and performs best in full sun with good drainage.
Identification
Plants range from low prostrate mats to upright shrubs reaching about 3 to 20 feet high and similar across. Leaves are needle or scale like depending on form and the species produces berry like cones on female plants.
Where to grow and common uses
Use juniper for groundcover on slopes, low hedging, windbreaks and erosion control. It suits exposed sites and poor dry soils where many other plants struggle.
Hardiness and size considerations
This species is generally hardy in USDA zones 2 to 7. Colder sites favor slow, shrubby growth while warmer sites can stress some plants so choose a local adapted form.
Soil and light
Plant in well drained soil. Juniper tolerates poor, dry, rocky and alkaline soils. Avoid waterlogged heavy clay because poor drainage often leads to root rot and decline. Full sun gives the best vigor and berry production and partial shade can reduce health and fruiting.
Planting and spacing
Select a cultivar and space plants roughly at their expected mature spread. Small prostrate types can be planted closer and upright forms need room to reach their mature width.
Watering and care
Establish young plants with regular watering until roots are set then reduce frequency. Overwatering and poor drainage will cause decline while dry tolerant mature plants show browning only under extreme stress.
Pruning and controlling spread
Light pruning maintains shape and renewal of thinning branches. Avoid cutting into old wood that has little live growth because juniper does not reliably reshoot from bare, mature stems.
Propagation
Propagate by seed with cold stratification or by semi ripe cuttings and layering. Cuttings and layering preserve cultivar traits while seed raised plants can vary from the parent.
Frequently asked questions
- How fast does Juniper grow?
- Growth is generally slow to moderate and varies by cultivar and site. Mature height commonly ranges from about 3 to 20 feet depending on form and conditions.
- What soil does Juniper prefer?
- Juniper prefers well drained soils and tolerates poor dry and rocky conditions. Avoid sites that stay waterlogged.
- Where is Juniper hardy?
- Juniper is typically hardy in USDA zones 2 to 7 but performance can vary with local climate and cultivar choice.
- How should I space Junipers?
- Space plants at about their expected mature spread. Use specific cultivar data when available for best results.
- Are Junipers poisonous?
- Toxicity varies by species. Some junipers can cause problems for livestock if eaten in quantity and sap can irritate sensitive skin. Check local extension guidance before using any berries or advising livestock access.
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