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Rocky mountain juniper
Also known as: River juniper, Western red cedar
Rocky mountain juniper (Juniperus scopulorum) is a relatively slow-growing evergreen tree that grows from 5 to 6 m tall with a columnar to a rounded shape. It has dark green foliage and berries that attract birds and other wildlife. Its aromatic wood is often used in cedar chests and lumber. It does not grow well in humid climates.
Scientific classification
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Perennial
Lifespan
Tree
Plant Type
Late spring, Early summer, Mid summer
Bloom Time
Mid fall
Harvest Time
5 m to 20 m
Plant Height
1.2 m to 1.8 m
Spread
Green, Blue
Leaf Color
Black, Blue
Fruit Color
Yellow, Green, Blue
Flower Color
Blue, Green, Black
Stem Color
Winter dormancy
Dormancy
Evergreen
Leaf type

Images of Rocky mountain juniper

Attributes of Rocky mountain juniper

Growth Rate
Rocky mountain juniper's slow growth rate manifests prominently during its active growing period in spring and summer. This reserved expansion results in tighter, compact foliage, elevating tonal uniformity. Despite seasonal temperature variations, growth remains consistently slow, fostering uniform bark thickness. Intriguingly, this slow maturation imbues rocky mountain juniper with exceptional resilience to environmental stressors.

Distribution of Rocky mountain juniper

Distribution Map
Rocky mountain juniper is originally from the mountainous regions of North America, predominantly within the continent's western areas. It has been introduced and is cultivated in various temperate regions, where it adapts to diverse landscapes beyond its native range.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Dry rocky ridges, foothills and bluffs
Hemisphere Trend Curve

Culture

Garden Use
Rocky mountain juniper is a long-lived but slow-growing small tree or shrub often cultivated as a wind block, street tree, or visual screen. They are particularly pleasing when male and female trees are planted near each other, as they will produce small flowers and attractive juniper berry fruits. The roots are shallow, and some appear at the ground’s surface: an important consideration when choosing a location to plant this tree.
Symbolism
Protection, Anti-Theft Love
Name Story
Rocky mountain juniper: As the common name suggests, rocky mountain Juniper is a common evergreen distributed throughout the rocky mountains. The specific epithet scopulorum means mountains. Therefore, it is commonly called rocky mountain Juniper.
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Toxicity

Rocky mountain juniper exhibits mild toxicity to cats and dogs. Consumption of high amounts of rocky mountain juniper seeds can cause physical discomfort or nonspecific signs of illness. Immediate veterinary assistance is crucial. Owners should prevent their pets from accessing rocky mountain juniper seeds to ensure safety and wellbeing. Symptoms may include gastrointestinal upset or severe health issues in both cats and dogs.
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Quickly Identify Rocky mountain juniper

1
Distinct dioecious flowers on separate plants: female greenish-yellow, male yellow.
2
Needle-like juvenile leaves transition to flat, scale-like mature leaves with musty scent.
3
Exfoliating bark in reddish-brown to gray thin strips on branches, smooth on smaller ones.
4
Round, two-lobed fruit cones, initially green, mature to bluish-purple with waxy bloom.
5
Sturdy trunk up to 2 feet (60 cm) wide with exfoliating bark varying in colors.
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Care Guide for Rocky mountain juniper

Every 1-2 weeks
Water
Full sun
Sunlight
5 - 32 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Rocky mountain juniper is drought-tolerant, thriving in arid conditions by storing water in its dense foliage. Cultivated, it needs watering once every 1-2 weeks with dry soil. Preferring dry air and well-draining soil, rocky mountain juniper is an evergreen that enhances landscape resilience.
Fertilize: For optimal growth and resilience in rocky mountain juniper, apply balanced nutrition fertilizers annually in early spring. Avoid over-fertilization to protect roots. No fertilization is needed in winter. Follow product guidelines for application on damp soil to enhance nutrient uptake and overall health.
Pruning: Rocky mountain juniper benefits from early to late winter pruning, focusing on thinning, dead branch removal, and shaping. Conservative techniques reduce stress and promote health while enhancing airflow and light penetration. Regular care keeps rocky mountain juniper structurally sound and visually appealing, minimizing pest risk.
Propagation: Rocky mountain juniper is a conifer that thrives when propagated from cuttings. Use a healthy, semi-hardwood segment treated with rooting hormone, and plant it in well-draining soil. Maintain consistent moisture, partial sunlight, and high humidity with a plastic dome for optimal root development.
Repotting: Repot rocky mountain juniper every 2-3 years in early spring, using a container 20% larger. Water sparingly post-repotting and ensure well-draining soil. Rocky mountain juniper requires consistent moisture but cannot tolerate soggy roots.
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