From Tiny Sprigs to Emerald Walls: Choosing the Right...

From Tiny Sprigs to Emerald Walls: Choosing the Right Western Arborvitae for Your Hedge

There’s a special satisfaction in watching small conifer starts knit together into a lush, year-round screen. If you’re dreaming of a living privacy wall that stands up to wind, winter, and wandering eyes, western arborvitae—primarily the western redcedar and its close kin—deserves your attention. This guide walks you through how to choose western arborvitae for hedges that match your site, style, and schedule. You’ll learn how to read your microclimate, compare cultivars, space plants for rapid coverage, and maintain dense foliage without constant fuss. Consider this your blueprint for turning tiny sprigs into an elegant, enduring hedge.

What “Western Arborvitae” Really Means

Species and Hybrids You’ll See in the Trade

When gardeners say “western arborvitae,” they usually mean Thuja plicata (western redcedar) and closely related hybrids with a similar look and performance. You’ll encounter a spectrum of cultivars chosen for fast growth, narrow habits, and deep green color. Some common choices include:

Thuja plicata types: ‘Virescens’, ‘Excelsa’, ‘Atrovirens’, ‘Hogan’, ‘Martin’, ‘Zebrina’, ‘Forever Goldy’ (a golden form), among others.
Hybrid: ‘Green Giant’ (a cross of Thuja standishii × Thuja plicata)—famed for speed and vigor.

Note: ‘Emerald Green’ (often sold as ‘Smaragd’) is Thuja occidentalis, the eastern arborvitae. It’s excellent in many landscapes but is not western arborvitae. We’ll reference it only for comparison so you don’t confuse cultivar names with the “emerald walls” metaphor in this article’s title.

Why Choose Western Types for Hedges?

Vigor and size: Many western forms grow quickly and reach substantial height, making them ideal for tall privacy screens and windbreaks.
Richer green and feathery texture: Foliage often reads deeper green and more layered than typical eastern forms, especially in maritime climates.
Resilience: Several cultivars handle wind and variable soils better, and many hold color through winter with minimal bronzing.

That said, not every yard needs a giant. Learning how to choose western arborvitae for hedges starts with matching cultivar to the job—your climate, space, timeline, and upkeep tolerance.

How to Choose Western Arborvitae for Hedges: A Quick Framework

If you only remember one section, make it this decision framework for how to choose western arborvitae for hedges:

Define your goal: What height and thickness do you need for privacy, wind control, or noise buffering? How quickly do you want coverage?
Map your site: USDA zone, heat exposure, wind corridors, sun hours, soil drainage, and available width.
Pick the right habit: Columnar for narrow spaces, conical for fuller bases, fastigiate for formal tight hedges.
Balance speed vs. maintenance: Faster growers screen sooner but may need more pruning; slower, narrower forms demand less shearing.
Plan spacing to fit mature size: Crowd too tightly and you’ll fight disease and dieback; space too widely and you’ll wait years for privacy.
Source quality plants: True-to-name cultivars, healthy roots, and consistent sizing make or break uniform hedges.

Use these points as you evaluate cultivars and layout options. Each decision flows from these fundamentals.

Climate and Site: Matching Plant to Place

USDA Zones and Heat Tolerance

Most western arborvitae thrive in USDA Zones 5–8, with some pushing into 9 in mild, irrigated locations. Heat and humidity can stress them, so in warm-summer climates choose cultivars known for heat tolerance (e.g., ‘Green Giant’) and prioritize excellent soil preparation and irrigation.

Sun, Shade, and Wind

Sun: Full sun (6+ hours) yields the densest growth. Light shade is tolerable; deep shade leads to legginess and thin screens.
Wind: Many western types make good windbreaks but need secure rooting. In exposed sites, establish deep watering and consider temporary wind screens for the first winter.
Microclimates: South-facing walls bake plants; north-facing alleys may be cold and still. Adjust cultivar choice and irrigation accordingly.

Soils, Drainage, and pH

Drainage is non-negotiable. Poorly drained or compacted soils invite root rot. In heavy clay or near high water tables, use raised berms and generous organic matter.
Soil pH: Slightly acidic to neutral (about 6.0–7.5) is ideal. Arborvitae are adaptable but unhappy in extremes.
Moisture: Even moisture during establishment is critical; once rooted, many cultivars tolerate brief dry spells.

Understanding these site variables is essential to how to choose western arborvitae for hedges that won’t languish after planting.

Growth Habits That Shape a Hedge

Mature Height and Width

“How tall and how wide?” are the first questions to answer. Western forms can range from columnar 12–18 ft selections to 40 ft giants. For suburban lots, think through view lines, neighbors, and municipal height rules. Oversizing now leads to costly pruning or removal later.

Growth Rate vs. Your Timeline

Fast (2–3+ ft/year under ideal care): ‘Green Giant’, vigorous plicata types like ‘Excelsa’ in maritime climates.
Moderate (1–2 ft/year): ‘Virescens’, ‘Hogan’, many upright plicata cultivars in average garden conditions.
Slower/narrow (8–12 in/year): Highly compact forms; rarely used for tall hedges but useful where space is razor-thin.

Faster isn’t always better. Speedy cultivars need more guiding cuts to maintain tidy lines. If you prefer low maintenance, choose naturally narrow, upright forms and accept a slightly longer path to full privacy.

Form: Columnar, Conical, Fastigiate

Columnar: Slim profile from top to bottom; ideal for tight spaces and formal allees.
Conical (pyramidal): Slightly broader base and softer silhouette; fills quickly at ground level.
Fastigiate: Strongly upright branching; great for crisp hedge faces with minimal shearing.

Foliage Color and Winter Performance

Look for cultivars that hold deep green in winter without heavy bronzing or yellowing. Golden forms add glow but can be less tolerant of scorching sun in hot climates. Texture matters, too: lacy sprays often knit into denser walls with a soft, luxurious look.

Cultivars to Know: A Western Arborvitae Shortlist

There’s no single best plant for every hedge. The art of how to choose western arborvitae for hedges is about pairing attributes with goals. Here are proven contenders:

‘Green Giant’ (Thuja standishii × plicata)

Why choose it: Celebrated for speed, vigor, and adaptability. It rockets into a high screen and tolerates heat and humidity better than many plicata selections.

Zones: 5–8 (9 with irrigation and shelter)
Size: 30–40+ ft tall, 8–12 ft wide; can be maintained smaller with annual shearing
Growth rate: Fast (2–3+ ft/year when happy)
Best for: Tall privacy, windbreaks, large properties
Spacing: 5–8 ft on center for hedges; wider for windbreaks

Considerations: Needs room. If you set plants too close for a tight screen, expect more pruning long-term. In snow country, consider seasonal tying to prevent splaying.

‘Virescens’ (Thuja plicata)

Why choose it: Upright, refined habit with consistently rich green foliage. Takes well to hedging and forms a dignified wall with fewer flyaway branches.

Zones: 5–8
Size: 20–30 ft tall, 6–10 ft wide
Growth rate: Moderate to fast
Best for: Elegant privacy hedges where a slightly narrower form is preferred
Spacing: 3.5–6 ft on center depending on timeline

‘Excelsa’ (Thuja plicata)

Why choose it: Classic, robust plicata selection with a substantial presence and handsome, full base. Great for maritime climates and larger hedges.

Zones: 5–8
Size: 25–35 ft tall, 10–12+ ft wide if unpruned
Growth rate: Fast in good soils
Best for: Big, beautiful screens, estate hedges, wind protection
Spacing: 5–8 ft on center; give it elbow room

‘Hogan’ (Thuja plicata)

Why choose it: Naturally narrow and upright; simplifies maintenance in tight corridors where width must be controlled.

Zones: 5–7/8
Size: 15–25 ft tall, 3–5 ft wide
Growth rate: Moderate
Best for: Side yards, urban fences-to-hedges conversions
Spacing: 2.5–4 ft on center for quick closure

‘Atrovirens’ (Thuja plicata)

Why choose it: Deep, dark green color with a stately presence; responds well to shaping and holds winter color.

Zones: 5–8
Size: 20–30 ft tall, 8–10 ft wide
Growth rate: Moderate to fast
Best for: Formal hedges with rich color year-round
Spacing: 4–6 ft on center

‘Martin’ (Thuja plicata)

Why choose it: Balanced habit—neither too wide nor too fast—making it manageable for medium spaces.

Zones: 5–8
Size: 18–25 ft tall, 6–8 ft wide
Growth rate: Moderate
Best for: Suburban privacy hedges, mixed conifer screens
Spacing: 3.5–5 ft on center

‘Zebrina’ (Thuja plicata)

Why choose it: Variegated, cream-striped sprays add visual sparkle; fantastic where ornament meets function. Slightly looser than strictly formal types.

Zones: 5–8
Size: 20–30 ft tall, 8–10 ft wide
Growth rate: Moderate
Best for: Decorative privacy, focal hedges
Spacing: 4–6 ft on center

‘Forever Goldy’ (Thuja plicata)

Why choose it: Cheerful golden foliage with a compact, upright shape; a luminous accent in mixed hedges. Not for scorching hot, reflective sites without irrigation.

Zones: 5–8
Size: 12–18 ft tall, 3–5 ft wide
Growth rate: Moderate
Best for: Color punctuations within a green hedge; smaller gardens
Spacing: 3–4.5 ft on center

There are many others, but this lineup helps illustrate the range of habits, colors, and care needs you can align with your goals as you decide how to choose western arborvitae for hedges.

Spacing and Layout: From Row to Living Wall

Single Row, Double Row, or Staggered?

Single row: Most common for property lines; choose spacing based on mature width.
Double row: Offset plants in two rows (staggered) for ultra-rapid coverage and sound buffering; requires more space and water.
Staggering within a single row: On curves or constrained sites, slight staggering can fill visual gaps without a full double-row installation.

Rule-of-Thumb Spacing by Habit

Very narrow/fastigiate (e.g., ‘Hogan’): 2.5–4 ft on center
Moderate columnar (e.g., ‘Virescens’, ‘Martin’): 3.5–5 ft on center
Broad conical (e.g., ‘Excelsa’, ‘Green Giant’): 5–8 ft on center

For a hedge, space closer to the narrow end of each range to accelerate closure, but never cram so tightly that trunks and central stems collide as they mature. Proper spacing is central to how to choose western arborvitae for hedges that remain healthy for decades.

Corner Anchors, Gates, and Sight Lines

Where hedges turn corners or frame entries, use slightly larger specimens or a sturdier cultivar to anchor views. Maintain sight triangles at driveways for safety. If local codes dictate setback or height, bake that into your design now to avoid future reductions.

Plant Size at Purchase and Timeline

Small containers (1–3 gal): Least expensive; fastest to establish; 2–4 years to knit into a screen depending on cultivar and spacing.
Medium (5–7 gal): Balanced cost and speed; root systems are still manageable.
Balled & burlapped (B&B): Instant height but slower establishment; plan extra watering and staking if windy.

Buying bigger saves time in year one but may not surpass smaller stock by year three if the small plants root in quickly. Consider budget and logistics (transport, labor) along with your screening timeline.

Buying Smart: Plant Quality and Sizing

Container vs. B&B vs. Bare-Root

Container-grown: Flexible timing and sizes; check for root circling and loosen mats before planting.
B&B: Heavier, costlier, but tall right away; avoid letting root balls dry out; plant at correct depth.
Bare-root: Rare for arborvitae hedges; if used, must be handled and planted promptly in cool, moist conditions.

Read the Label, Verify the Cultivar

True-to-name: Ask for documented cultivar names and reputable sources; mislabels cause uneven hedges.
Uniform batch: Choose plants with similar height, caliper, and branching to reduce patchy growth.
Foliage health: No off-color, spotting, or mite stippling; avoid plants with extensive browning inside the canopy.

Budgeting the Hedge

Cost is a function of plant size, quantity, and preparation. A simple formula:

Plants = Hedge length (ft) ÷ Spacing (ft) + 1 or 2 for overlaps
Total plant cost = Plants × Price per plant (plus delivery/tax)
Site prep = Soil amendments + mulch + irrigation line (optional)
Labor = Digging + planting + clean-up (DIY or pro)

Invest first in soil preparation and irrigation—those dollars pay you back in survival rate and uniform growth.

Planting Western Arborvitae the Right Way

Best Planting Windows

Early fall: Prime in many regions; warm soil + cool air boosts rooting.
Spring: Also excellent; monitor watering as heat arrives.
Summer: Possible with diligent irrigation and mulch; avoid heat waves for new installs.

Hole Prep and Planting Depth

Loosen soil in a wide area; dig holes no deeper than the root ball, 2–3× as wide.
Set plants with the root flare at or slightly above grade; never bury trunks.
Amend surrounding soil with compost if native soil is poor, but backfill primarily with loosened native soil to prevent “pot effect.”
Score or tease circling roots on container stock to encourage outward growth.

Watering-In and Mulching

Water thoroughly to settle soil and remove air pockets.
Apply 2–3 in of organic mulch (wood chips, shredded bark) over a wide ring, keeping mulch off the trunk.
Install drip lines or soaker hoses for even, efficient irrigation.

Staking and Wind Protection

Most arborvitae don’t need permanent stakes. In windy sites, use low, flexible ties for the first season. In snow belts, soft twine wraps help prevent splaying and breakage.

Early Care: Water, Feed, and Mulch

Watering Schedule (First Two Years)

Weeks 1–6: Keep root zones consistently moist without waterlogging. Check 2–3 times per week (more in heat, less in cool rain).
Months 2–12: Deep water weekly in dry spells; aim for moist soil to 8–12 in depth.
Year 2: Taper to deep, infrequent watering; encourage deep roots.
Fall drought rule: Enter winter well-watered to reduce desiccation.

Fertilization Do’s and Don’ts

Do test soil first; correct deficiencies and pH rather than guessing.
Do use slow-release, balanced fertilizer in spring if growth is weak.
Don’t over-fertilize new plantings; roots need time to establish.
Don’t use high-salt quick-release products that can burn roots.

Mulch Best Practices

Maintain a 2–3 in layer, top up annually.
Keep mulch 2–3 in away from trunks to prevent rot.
Use arborist chips or shredded bark for slow, steady organic matter.

Training and Pruning for Dense Screens

Establish the Hedge Line Early

Once plants put on their first flush, tip-prune leaders and side shoots lightly to encourage branching. For formal hedges, stretch a line and use it as a guide to develop even faces on both sides.

Shearing vs. Selective Pruning

Shearing (late spring/early summer): Good for uniform faces; keep outer cuts within the green shell—avoid cutting back to bare wood.
Selective pruning: Reach into the canopy to thin congested areas and allow light in; reduces pest pressure and keeps foliage green deeper inside.

Avoid Common Pitfalls

Don’t flat-top too soon: Allow leaders to reach target height before leveling; premature topping slows vertical progress.
Keep the base slightly wider than the top so light reaches lower foliage, preserving fullness to the ground.
Time your cuts: Avoid heavy late-summer pruning that stimulates tender growth before frost.

Troubleshooting: Pests, Diseases, and Weather

Deer and Browsers

Western types are often more deer-resistant than eastern arborvitae but not deer-proof. In high-pressure areas, use repellents, fencing, or choose sites with natural deterrents (dogs, human traffic). Mixing in less palatable evergreens can also help.

Insects to Watch

Bagworms: Hand-pick cocoons in winter; use Bt or appropriate controls when larvae are small.
Spider mites: Look for stippling during hot, dry spells; rinse foliage and improve humidity; miticides if severe.
Scale insects: Treat with horticultural oil at the right stage; encourage beneficial insects.
Leaf miners: Tip browning and tunnels in sprays; prune out affected shoots and monitor.

Diseases and Cultural Stress

Root rot (Phytophthora): Prevent with drainage and proper planting depth; avoid chronically wet sites.
Needle blight: Improve air flow, thin lightly, remove litter; fungicides only as part of an integrated program.
Winter burn: Water well in fall, mulch, and consider anti-desiccants or wind screens in exposed sites.

Snow, Ice, and Wind

In snow belts, tie loosely with soft twine to prevent splitting.
After storms, brush off snow upward; don’t yank branches downward.
In wind zones, allow time for deeper rooting before heavy shearing.

Special Situations

Coastal Gardens and Salt

Western arborvitae handle coastal conditions better than many conifers but still dislike direct salt spray. Provide windbreaks inland of dune lines and rinse foliage after storms when feasible. Mulch to buffer roots from shifting sands and salts.

Urban Sites and Narrow Side Yards

Heat, reflected light, and compacted soils stress hedges. Choose narrow, upright cultivars like ‘Hogan’, improve soil with compost, and automate irrigation. In ultra-tight spots, consider alternating arborvitae with columnar junipers for airflow and diversity.

Mixed Hedges for Biodiversity

A single-species wall can be handsome, but diversity reduces risk from pests and storms. Pair western arborvitae with other evergreens—yew, holly, Osmanthus, or columnar spruce—in repeating patterns. You’ll get year-round interest and ecological resilience.

Fire-Wise Considerations

In fire-prone regions, keep hedges well-watered and free of dry litter. Maintain defensible space near structures, and avoid continuous resinous screens adjacent to wooden fences. Consult local guidelines for spacing and species mixes.

Sustainable Hedges: Water, Wildlife, and Carbon

Irrigation Efficiency

Use drip or soaker systems to deliver water at the root zone.
Water early morning to reduce evaporation.
Group plants by water need; western arborvitae prefer consistent moisture during establishment.

Soil Health

Incorporate compost before planting; maintain mulch to feed microbiology.
Avoid frequent tilling; let soil structure develop under the hedge.
Leave clippings from light shearing as mulch where neatness allows.

Wildlife Value

Dense evergreen hedges offer shelter and nesting for small birds. To increase habitat value, layer the hedge with native shrubs on the non-public side and allow some seasonal flowering companions nearby for pollinators.

Frequently Asked Questions

How fast will my hedge fill in? With good care, fast cultivars like ‘Green Giant’ can touch tips in 2–3 seasons at 5–6 ft spacing; narrower forms at 3–4 ft spacing can close within 2–4 years.
Can I keep western arborvitae at 8–12 ft? Yes, with annual light shearing and timely leader reduction after spring flush. Choose naturally narrower cultivars to reduce pruning effort.
Are they drought-tolerant? Moderately, once established. Expect regular irrigation the first two years and during extended dry spells thereafter.
Do they grow in shade? Light shade is fine; deeper shade reduces density and encourages legginess. For dense privacy, prioritize sun.
Are they deer-proof? No. Western types are often less palatable than eastern, but browse still occurs. Use repellents or barriers where deer are bold.

A Step-by-Step Checklist

Use this condensed workflow as you finalize how to choose western arborvitae for hedges that thrive:

1. Clarify goals: Target height, thickness, and style (formal vs. natural).
2. Assess site: Zone, sun hours, wind, soil texture and drainage, width available.
3. Shortlist cultivars: Match habit and speed to your goals—e.g., ‘Hogan’ for narrow, ‘Virescens’ for refined upright, ‘Green Giant’ for rapid tall screens.
4. Decide spacing: Use recommended ranges; choose tighter end for faster closure without future crowding.
5. Source plants: Reputable nursery, consistent batch, healthy roots, verified cultivar labels.
6. Prepare soil: Fix drainage, add compost, lay irrigation, mark straight lines.
7. Plant correctly: Right depth, wide holes, tease roots, water-in, mulch.
8. Establish care: Consistent moisture year 1–2, light spring feeding if needed, maintain mulch.
9. Train and prune: Light tip-pruning after flush, keep base slightly wider, avoid late heavy cuts.
10. Monitor health: Watch for mites, bagworms, and root stress; adjust watering seasonally.

Conclusion: From First Planting to Evergreen Privacy

Mastering how to choose western arborvitae for hedges comes down to aligning a plant’s natural form with the realities of your site and the level of maintenance you can provide. Western types and their hybrids offer a powerful palette—from narrow uprights that tame tight city lots to vigorous, windfast giants that shield rural homes. Begin with your goals, select cultivars with the right habit and climate fit, space them with maturity in mind, and support them through the first two years with water and mulch. With those pieces in place, your small sprigs will knit into the emerald wall you imagined—quiet, green, and gracefully doing their job in every season.

Appendix: Sample Matching Guide

If this is your site...

Narrow side yard, HOA height limits, full sun: Choose ‘Hogan’ at 3–3.5 ft spacing; tip-prune annually.
Windy rural edge, need fast tall screen: Choose ‘Green Giant’ at 5–6 ft spacing; tie in winter, light annual shaping.
Coastal, sandy loam, moderate salt: Choose ‘Virescens’ or ‘Excelsa’, mulch deeply, drip irrigate, plant behind windbreak.
Decorative privacy near patio: Mix ‘Virescens’ with ‘Forever Goldy’ accents every fourth plant for color rhythm.

Use these scenarios as springboards. Tailor to your microclimate, then execute with careful planting and steady early care. That’s the essence of how to choose western arborvitae for hedges that are beautiful, durable, and delightfully low-drama.