Juniperus horizontalis 'Wiltonii'

Wiltonii Juniper

Juniperus horizontalis ‘Wiltonii’ — commonly called Blue Rug juniper — is a low-growing evergreen shrub valued for its dense, mat-forming habit and silvery-blue foliage that intensifies in full sun and often develops purplish tones in winter. Its tightly layered, trailing branches create a uniform ground-hugging carpet, making it one of the most widely used junipers for dependable groundcover.

Type: Evergreen shrub

Mature Size:
Width: 6–8 ft
Height: 6–12 in.

USDA Zones: 3a–9b

Form: Very low, prostrate, mat-forming

Light: Full sun

Soil: Well-drained soil; thrives in sandy, rocky, and poor soils

Water: Low; highly drought tolerant once established

Wildlife: Provides shelter for birds; deer resistant

Features & Landscape Uses: Excellent for slopes, groundcover, rock gardens, and erosion control. Its uniform growth and strong blue color provide consistent year-round interest.

Care: Plant in full sun with excellent drainage. Avoid heavy, wet soils. Minimal pruning is needed; trim lightly only if shaping is desired.

Plant type

Evergreen Shrub

Height

8-12"

Width

6-8'

Hardiness zones

3–9

Sunlight

Full Sun

Growth rate

Moderate

Leaf color

Asparagus

Fall color

Blue Green

Soil

Average, Sandy, Well Drained

Landscape use

Accent Plant, Container, Mass Planting

Shape

Wide Spreading

Deer resistant

Yes

Salt tolerant

Yes

Drought tolerant

Yes