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Barrier 19 Arborvitae

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Barrier 19 Arborvitae

layout: base.njk title: "Arborvitae / Eastern White Cedar" plantName: "Thuja occidentalis" category: "Barrier Hedge & Support Species" description: "Growing guide for Arborvitae / Eastern White Cedar in West Virginia Zone 6b/7a" tags: planting-guide

Type: Evergreen conifer (tree)
Family: Cupressaceae (Cypress family)
Sun: Full sun to partial shade
Water: Moderate; prefers consistent moisture
Soil pH: 5.5-7.5 (prefers slightly acidic; adaptable)
Hardiness: Zones 2-7 (excellent for WV Zone 6b/7a)
Growth Rate: Slow to medium (6-12 inches/year)
Mature Size: 20-40 ft tall × 6-12 ft spread (varies by cultivar)

⚠️ NATIVE STATUS

✅ NATIVE TO NORTHEASTERN NORTH AMERICA (MARGINAL IN WV)

Eastern arborvitae is native to northeastern North America (Great Lakes region, northeastern US, eastern Canada). West Virginia is at the SOUTHERN EDGE of its native range—native only in northern WV mountains/higher elevations.

Status in WV: Native in northern/higher elevation WV. May struggle in hot, humid lowlands of southern WV. Heat stress in Zone 7b+.

Ecological Value: - Year-round windbreak, screening - Winter wildlife habitat (deer browse heavily) - Native to northern WV - Generally pest-free

Recommended: YES for northern WV, higher elevations. Use with caution in southern WV lowlands (heat stress). Consider alternatives for hot sites.

📅 Planting Calendar (WV Zone 6b/7a)

Activity Timing Notes
Plant container/bare-root March-April OR September-October Avoid summer planting
Prune Late winter (February-March) Before new growth
Mulch Spring Maintain moisture
Water Regular, especially summer Critical for establishment

🌾 Varieties / Cultivars

Eastern Arborvitae / Eastern White Cedar (Thuja occidentalis)

  • Source: Native plant nurseries, regular nurseries
  • Notes: Wild-type. Pyramidal form. Dense foliage. Native to northern WV.

'Emerald Green' (Smaragd)

  • Source: Most nurseries
  • Notes: MOST POPULAR. Narrow (3-4 ft wide), dense, bright green. Slow growing. Heat tolerant (for arborvitae).

'Green Giant' (Thuja × 'Green Giant')

  • Source: Most nurseries
  • Notes: Hybrid (T. occidentalis × T. standishii). FAST growing (3-5 ft/year). Large (50-60 ft). More heat/disease resistant. Excellent windbreak.

'Degroot's Spire'

  • Source: Specialty nurseries
  • Notes: Very narrow (1-2 ft), spiral form. Slow growing.

'Little Giant'

  • Source: Nurseries
  • Notes: Dwarf (3-4 ft tall). Round form. Slow growing.

'Holmstrup'

  • Source: Nurseries
  • Notes: Narrow (2-3 ft), dense. Slow-medium growth.

'Yellow Ribbon'

  • Source: Nurseries
  • Notes: Golden-yellow new growth. Narrow form.

📜 Cultural History & Native Range

Native Range: Northeastern North America (Great Lakes, northeastern US, eastern Canada). In West Virginia, native only in northern mountains, higher elevations (cooler, moister sites).

West Virginia Habitat: Cool, moist slopes, ravines, stream valleys in northern/higher elevation WV. Not native to southern WV lowlands.

Indigenous Use: - Northeastern tribes (Ojibwe, Algonquin, etc.): Extensive use - Bark, branches: Tea for colds, fever, vitamin C (high vitamin C content) - Wood: Canoes, baskets, roofing, poles - Medicinal: Respiratory issues, rheumatism

Historical Applications: - Windbreaks: Extensively planted on farms (1800s-1900s) - Cemetery plantings: Symbol of eternal life (evergreen) - Ornamental: Popular landscape tree - Timber: Fence posts, shingles, canoe frames (rot-resistant) - Essential oil: Thujone (aromatherapy, insecticide)

Ecological Role: - Year-round cover for wildlife - Winter deer food (heavily browsed) - Nesting sites for birds - Windbreak, erosion control

Cultural Significance: - "Tree of Life" (Indigenous name) - Symbol of longevity, eternal life - Traditional Appalachian (northern) medicinal plant - Modern landscaping staple

🌿 Farm Functions

Primary Functions: - Windbreak: EXCELLENT dense evergreen windbreak. Year-round protection. 'Green Giant' fastest growing. - Privacy screen: Dense foliage blocks views year-round - Erosion control: Root system stabilizes slopes - Wildlife habitat: Winter cover, nesting sites, deer browse (heavily) - Snow fence: Breaks snow drifts

Secondary Functions: - Medicinal: Traditional use for colds, respiratory (consult herbalist; contains thujone—toxic in large doses) - Essential oil: Thujone (aromatherapy, insect repellent) - Craft: Flexible branches for baskets, wreaths - Rot-resistant wood: Fence posts, outdoor use (limited quantity) - Ornamental: Year-round interest, formal hedges

What Wildlife It Supports: - Deer: HEAVILY browse foliage (winter food source—can be problem) - Birds: Nesting sites (dense cover), seeds eaten by some species - Small mammals: Cover, protection from predators

🌱 Growing in WV Clay

Site Selection: FULL SUN to PART SHADE. PREFERS COOL, MOIST SITES. Struggles in hot, humid, droughty sites. Ideal for northern WV, higher elevations, moist valleys, north-facing slopes. Provide afternoon shade in southern WV.

Soil Prep: For clay soil: - Loosen soil 12-18" deep, 2-3× root ball width - Amend with compost, peat moss to improve drainage, lower pH - Mulch heavily (4-6") to maintain moisture, cool roots

Planting: - Container/bare-root: March-April OR September-October (NOT summer) - Depth: Plant at nursery depth (don't plant deep) - Spacing: 4-6 ft apart for hedge/windbreak; 15-20 ft for specimen - Water thoroughly after planting - Mulch 4-6" (keep away from trunk)

Care: - Water: CRITICAL—keep consistently moist, especially first 2 years and during drought. Shallow roots (drought sensitive). - Fertilizer: Light feeding in spring (balanced fertilizer) - Pruning: Light pruning in late winter; don't cut into old wood (won't resprout) - Weed control: Keep weed-free, mulched

Propagation: - Cuttings: Semi-hardwood (July-August); challenging, requires hormone, mist system - Seeds: Stratification 60-90 days; slow, variable - Most propagated vegetatively (cultivars)

✂️ Management

Pruning: - When: Late winter (February-March) before new growth - How much: Light pruning only; DON'T cut into old brown wood (won't resprout from old wood) - Why: Shape, remove dead branches, maintain hedge - Shearing: Tolerates formal hedging (light shearing)

Watering: - Critical: Shallow root system—drought sensitive - Schedule: 1-2" per week, especially summer - Mulching: 4-6" organic mulch (retain moisture, cool roots) - Signs of stress: Brown tips, browning interior (water immediately)

Containment: - Not aggressive: Well-behaved, non-invasive - Seeds: Minimal self-sowing - No concerns: No invasive risk

Deer Protection: - Problem: Deer LOVE arborvitae (winter browse) - Solutions: Tall fencing, deer repellent, tree guards, choose less palatable alternatives - Damage: Browning, stripped foliage, stunted growth

⚠️ Cautions

Invasive Potential: ✅ NONE — Native species (northern WV) - Well-behaved, non-aggressive - No invasive concerns

Other Cautions: - Heat stress: Struggles in hot, humid southern WV lowlands (Zone 7b+). Provide afternoon shade, consistent water. Consider 'Green Giant' (more heat tolerant) or alternatives. - Drought sensitivity: Shallow roots—drought sensitive. Must water in dry periods. - Deer browse: HEAVILY browsed by deer (major problem in many areas). May need protection. - Diseases: Root rot (poor drainage), needle blight, canker (stress-related) - Toxicity: Contains thujone (toxic in large doses). Don't consume internally without expert guidance. Essential oil use with caution.

🌳 Integration in Farm Design

Where to Plant: - Windbreaks, privacy screens (PRIMARY use) - Northern WV, higher elevations (best adaptation) - Moist valleys, north-facing slopes - Formal hedges (sheared) - Foundation plantings (dwarf varieties) - Specimen trees (larger varieties)

Where NOT to Plant: - Southern WV lowlands (heat stress) - Droughty, exposed south-facing slopes - High deer pressure areas without protection - Poorly drained soil (root rot) - Hot, paved areas (heat reflection)

Guild Mates: - Other windbreak species: White pine, Norway spruce, juniper - Moisture-loving plants: Ferns, hostas (shade from arborvitae) - Deer-resistant plants: Around base (deer will browse arborvitae first)

Design Applications: - Windbreaks: Rows on north, northwest sides of farm - Privacy screens: Property lines, around patios - Formal hedges: Sheared borders - Specimen trees: Lawn, foundation plantings - Erosion control: Slopes, stream banks (cool, moist sites)

Alternatives for Hot Sites: - Green Giant arborvitae (hybrid, more heat tolerant) - Eastern red cedar (Juniperus virginiana—native, heat tolerant) - White pine (Pinus strobus—native, faster growing)

📖 Sources Consulted

  1. USDA PLANTS Database. Thuja occidentalis profile. plants.usda.gov
  2. West Virginia Division of Natural Resources. "Native Plants of West Virginia."
  3. Missouri Botanical Garden. Thuja occidentalis plant finder.
  4. Dirr, Michael A. (2009). Dirr's Encyclopedia of Trees and Shrubs. Timber Press.
  5. North Carolina Extension Gardener. "Thuja."
  6. Plants for a Future (PFAF). "Thuja occidentalis." pfaf.org
  7. Northeastern Indigenous ethnobotany resources
  8. Nursery catalogs, growing guides
  9. Landscape industry resources
  10. Deer management resources

🔍 Quick Reference

Attribute Value
Native Status ✅ Native to northern WV (marginal in southern WV)
Windbreak ⭐⭐⭐⭐⭐ EXCELLENT (dense evergreen)
Growth Rate Slow-medium (6-12"/year); 'Green Giant' fast (3-5 ft/year)
Water Needs ⭐⭐⭐⭐ HIGH (shallow roots, drought sensitive)
Heat Tolerance ⚠️ Poor in southern WV lowlands (Zone 7b+)
Deer Resistance ⭐ NONE (deer LOVE it—heavily browsed)
Invasive Risk ✅ NONE (native/naturalized)
Lifespan 50-100+ years (long-lived)
Best Use Windbreaks, privacy screens, formal hedges (northern WV, moist sites)

Bottom Line: Arborvitae/Eastern White Cedar is an EXCELLENT evergreen windbreak and privacy screen for northern West Virginia and higher elevations. Dense foliage, year-round protection. Struggles in hot, humid southern WV lowlands (heat stress, drought sensitivity). 'Green Giant' hybrid more heat tolerant, faster growing. DEER LOVE IT (major browse problem—may need protection). Shallow roots require consistent watering. Best for cool, moist sites in northern WV. Consider alternatives (Eastern red cedar, white pine) for hot, dry sites. 🐺🌲🦌