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Juniperus horizontalis (Creeping Juniper)

Creeping Juniper, Creeping Savin

Juniperus horizontalis, Creeping Juniper, Creeping Savin, Evergreen Shrub, Evergreen Tree

Juniperus horizontalis is a versatile and attractive ground cover plant, prized for its hardiness, low-growing habit, and adaptability to various environmental conditions. Its ease of care and year-round appeal make it a popular choice for a range of landscaping needs.

Juniperus horizontalis: An In-depth Look

Juniperus horizontalis, commonly known as Creeping Juniper, is a low-growing, spreading evergreen conifer. It’s notable for its sprawling habit and often used as a ground cover.

Native: Native to North America, particularly found in Canada and the northern United States. It thrives in a variety of habitats, including rocky or sandy soils.

Plant Type and Habit: Slow-growing and long-lived, this conifer has a ground-hugging habit, spreading horizontally rather than growing upright. It’s characterized by its dense, mat-forming growth.

Size: Creeping Juniper typically grows only about 6-18 inches tall (15-45 cm) but can spread widely, up to 5-8 feet (150-240 cm) or more, depending on the variety and conditions.

Cones: Junipers are dioecious with separate male and female plants. Male plants produce small pollen cones, while pollinated female plants produce small, blue-black berry-like cones, adding winter interest. They generally mature in two years and persist through winter.

Foliage: The foliage is needle-like when young, becoming more scale-like with age. Color can vary from green to blue-green, often with a purplish tinge in winter.

Bark: The bark is relatively inconspicuous, typically gray or brown and becoming more textured with age.

Uses: Widely used as ground cover, for erosion control, in rock gardens, and as edging plants. Also used in coastal landscapes due to its salt tolerance. Perfect for city gardens since Creeping Juniper is tolerant of pollution. Great for rocky soils and hot, dry garden spots.

Hardiness: Hardy in USDA zones 3-9, demonstrating adaptability to a wide range of climatic conditions.

Wildlife: The berry-like cones provide food for birds and small mammals. The dense foliage offers shelter for various wildlife.

Toxicity: Junipers are generally not toxic, but the cones can cause mild stomach upset if ingested in large quantities.

Deer and Rabbit: Relatively resistant to deer and rabbits, which makes it suitable for areas where these animals are a concern.

Drought: Once established, it has a good tolerance for drought conditions, making it a good choice for water-efficient landscapes.

Salt: Creeping Juniper exhibits a good level of salt tolerance. This characteristic makes it particularly suitable for coastal landscapes or areas where soil salinity is higher, as it can withstand salt spray and saline soil conditions better than many other ground cover species.

Invasiveness: This Juniper is not considered invasive. It grows in a controlled manner, maintaining its narrow form.

Benefits: Offers excellent ground coverage, erosion control, low maintenance, and year-round visual interest with its evergreen foliage.

Creeping Juniper Growing Tips

Light: Thrives in full sun for optimal growth and foliage color. Can tolerate partial shade, but may grow less densely.

Soil: Thrives in well-drained soil. Adaptable to a wide range of soil types, including clay, loam, and sandy soils.

Water: Requires moderate watering, especially when young. Established plants are relatively drought-tolerant. Ensure proper drainage to prevent root rot. Overwatering should be avoided.

Fertilizer: Lightly fertilize in spring with a balanced, slow-release fertilizer. Avoid over-fertilization to prevent excessive growth and potential disease issues.

Pruning: Generally requires minimal pruning. Prune to control spread or shape, preferably in late winter or early spring.

Propagation: Easily propagated from semi-hardwood cuttings taken in summer.

Pests and Diseases: Junipers are often prone to twig blight and needle blight. They also act as hosts for cedar-apple rust and similar rust diseases during part of their lifecycle. In wet, poorly drained soils, root rot can be a problem. Additionally, they may occasionally suffer from insect pests like aphids, bagworms, webworms, spider mites and scale insects.

Requirements

Hardiness 3 - 9
Heat Zones 1 - 9
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Conifers, Shrubs
Plant Family Cupressaceae
Genus Juniperus
Common names Juniper, Creeping Juniper
Exposure Full Sun
Season of Interest Spring (Early, Mid, Late), Summer (Early, Mid, Late), Fall, Winter
Height 6" - 2' (15cm - 60cm)
Spread 5' - 8' (150cm - 240cm)
Spacing 96" (240cm)
Maintenance Low
Water Needs Low, Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy, Evergreen
Native Plants United States, Rhode Island, Vermont, Connecticut, Maine, Massachusetts, New Hampshire, New York, Alaska, Rocky Mountains, Midwest, Northeast, Illinois, South Dakota, Minnesota, Nebraska, Iowa, Wisconsin, North Dakota, Ohio, Michigan, Montana, Wyoming
Tolerance Drought, Deer, Dry Soil, Rocky Soil, Salt
Garden Uses Banks And Slopes, Beds And Borders, Edging, Ground Covers
Garden Styles Traditional Garden, Informal and Cottage, Gravel and Rock Garden, City and Courtyard, Coastal Garden
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Alternative Plants to Consider

Juniperus chinensis ‘Kallay’s Compact’ (Chinese Juniper)
Juniperus chinensis ‘Holbert’ (Chinese Juniper)
Juniperus chinensis ‘Angelica Blue’ (Chinese Juniper)
Juniperus chinensis ‘Fairview’ (Chinese Juniper)
Juniperus scopulorum ‘Blue Heaven’ (Rocky Mountain Juniper)
Juniperus horizontalis ‘Bar Harbor’ (Creeping Juniper)

Recommended Companion Plants

Cornus sanguinea ‘Midwinter Fire’ (Bloodtwig Dogwood)
Campanula carpatica ‘Deep Blue Clips’ (Carpathian Bellflower)
Carex comans ‘Frosted Curls’ (New Zealand Hair Sedge)
Pinus heldreichii ‘Smidtii’ (Bosnian Pine)
Schizachyrium scoparium (Little Bluestem)
Rosa arkansana (Arkansas Rose)

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 3 - 9
Heat Zones 1 - 9
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Conifers, Shrubs
Plant Family Cupressaceae
Genus Juniperus
Common names Juniper, Creeping Juniper
Exposure Full Sun
Season of Interest Spring (Early, Mid, Late), Summer (Early, Mid, Late), Fall, Winter
Height 6" - 2' (15cm - 60cm)
Spread 5' - 8' (150cm - 240cm)
Spacing 96" (240cm)
Maintenance Low
Water Needs Low, Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy, Evergreen
Native Plants United States, Rhode Island, Vermont, Connecticut, Maine, Massachusetts, New Hampshire, New York, Alaska, Rocky Mountains, Midwest, Northeast, Illinois, South Dakota, Minnesota, Nebraska, Iowa, Wisconsin, North Dakota, Ohio, Michigan, Montana, Wyoming
Tolerance Drought, Deer, Dry Soil, Rocky Soil, Salt
Garden Uses Banks And Slopes, Beds And Borders, Edging, Ground Covers
Garden Styles Traditional Garden, Informal and Cottage, Gravel and Rock Garden, City and Courtyard, Coastal Garden
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