Arborvitae Shrub: Complete Growing Guide

The arborvitae shrub is the plant people reach for when they want a green wall fast. It blocks the neighbors, softens a fence line, and stays full and green all winter. This guide goes a step further than the usual list of types and planting steps. The difference between a hedge that thrives and one that goes bare comes down to a few early choices. You make them before you ever dig a hole.

Here is the core profile worth knowing. Arborvitae is an evergreen, and the most common type goes by the name Thuja occidentalis. It is hardy across USDA zones 3 to 7. The species grows slow and can reach 40 to 60 feet tall and 10 to 15 feet wide at full size. So an evergreen privacy screen made of arborvitae is a long game. This is not a quick fix you replace in 5 years. Plant it right and it stays for decades.

Now the one fact that reframes everything. Arborvitae cannot regrow foliage from bare wood. Cut into the old brown stems, let deer strip the bottom, or crowd the plants too tight, and those gaps stay empty for good. No new growth fills them in. That single fact is why so many hedges end up patchy and thin. With this plant, prevention beats cure every single time, so the smart work happens up front.

That is how this guide is built. You start by choosing the right arborvitae varieties for your space and your zone, since the wrong pick leads to half the problems people blame on bad luck. Then you move through planting and spacing, day-to-day care, winter burn, and deer. The name itself means tree of life, and the species can live past 400 years in the wild. Treat your arborvitae hedge like the long-term planting it is, and you set it up to outlast almost anything else in the yard.

A solid green wall now blocks the view from my kitchen window. It used to look out on my neighbor's open field. I planted that row of Emerald Green arborvitae 6 years ago. I picked it over the bigger types because that strip of yard was only 4 feet wide. Green Giant would have grown too big and crowded the path in a few seasons. So width won out over raw speed.

Picking the best arborvitae for privacy starts with one question, not a spec sheet. Do you want a small tidy screen, a fast tall wall, or a round accent near the door? Each answer points to a different plant, and matching the variety to your exact yard saves you from ripping out a row that got too big.

For a clean, narrow screen, Emerald Green is the workhorse. It tops out at 12 to 15 feet tall and just 3 to 4 feet wide. That slim shape fits tight property lines and stays off your walkway. When you have real room and want height fast, Green Giant arborvitae is the pick. It grows a quick 3 to 5 feet per year up to 40 to 60 feet. It also holds up to deer better than the native species. For corners, beds, and pots, a dwarf arborvitae globe gives you shape and color where a full screen would just crowd the space.

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Emerald Green Arborvitae

• Mature size: Reaches a tidy 12 to 15 feet tall and only 3 to 4 feet wide, which makes it the top pick for narrow yards and clean formal screens.
• Form: Holds a dense pyramidal shape that needs little shaping, so a row reads as a solid green wall without heavy pruning.
• Hardiness: Thrives in USDA zones 3 to 7, handling cold northern winters better than the larger fast hybrids.
• Growth rate: Grows at a slow to moderate pace, so plan on a few seasons of patience rather than instant height from this variety.
• Best use: Ideal as a property-line privacy screen, a foundation accent, or a low-fuss hedge along a driveway or patio.
• Consider: Like all arborvitae, it is highly attractive to deer, so factor in protection if browsing pressure is high in your area.

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Green Giant Arborvitae

• Mature size: Grows into a towering 40 to 60 feet tall and 12 to 20 feet wide, so it needs real space and is wrong for tight yards.
• Growth rate: Adds a fast 3 to 5 feet of height per year, the quickest way to a tall living wall when you have room for it.
• Deer tolerance: Tends to be more deer-resistant than the American species, a meaningful edge in high-pressure rural settings.
• Hardiness: Performs best in USDA zones 5 to 8, slightly less cold-hardy than Emerald Green at the northern edge.
• Best use: Best for fast, tall windbreaks and large-property screens where its mature width will not crowd a house or walkway.
• Consider: That speed and size mean ongoing room demands, so site it well back from structures and never plant it where you will later want it shorter.

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Dwarf and Globe Types (Hetz Midget, Rheingold)

• Mature size: Stay compact, often under 4 feet, forming rounded globes rather than tall columns for small-space planting.
• Form: Offer mounded, globular shapes that suit foundation beds, borders, and container accents instead of screening.
• Color: Varieties like Rheingold add golden and bronze winter tones, giving year-round interest beyond plain green.
• Hardiness: Share the species' wide cold tolerance across USDA zones 3 to 7, so they work in most northern gardens.
• Best use: Choose these for accent plantings, low borders, and pots where a full-size screen would overwhelm the space.
• Consider: They will not give privacy height, so pair them with taller varieties when you need both screening and accents.

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Techny and Smaragd (Hedge Workhorses)

• Mature size: Techny reaches roughly 10 to 15 feet with a broad base, while Smaragd is the European name often sold as Emerald Green.
• Form: Both hold dense foliage to the ground, which is just what a screen needs to block sightlines for good.
• Durability: Techny is valued for holding its color and shape through harsh winters with less burn than some cultivars.
• Hardiness: Reliable across USDA zones 3 to 7, making them dependable choices for cold-climate hedging.
• Best use: Use these for medium-height formal hedges where you want fullness without the towering scale of Green Giant.
• Consider: Confirm the exact cultivar name at the nursery, since regional trade names for these varieties overlap and cause confusion.

Climate should steer your choice too, not just size. The species is hardy down to zone 3. That is why Emerald Green and the dwarf types hold up through hard northern winters. Green Giant does its best work in zones 5 to 8. So if you garden in a cold pocket, weigh that hardiness alongside the height you want from your privacy hedge.

Getting the site right is half the battle, and most of the work happens before you ever dig the hole. Arborvitae wants full sun of at least 6 hours a day, plus moist, well-drained soil it can sink roots into. Give it that, and it mostly takes care of itself.

Soil chemistry matters more than people think. Test your soil pH before you plant. Arborvitae likes a neutral-to-slightly-alkaline range, somewhere between 5.5 and 8.0. A cheap kit from the garden center tells you in minutes whether you need to add lime or skip it.

Timing is the other piece. As for when to plant arborvitae, the best window is early spring or early fall, when the soil stays cool and damp. The roots can settle in before summer heat or hard frost. Plant in the heat of July and you'll fight to keep the thing watered.

Here is how to plant arborvitae the right way, step by step.

Arborvitae spacing depends on what you want the plants to do, and that single choice shapes the whole row. For a tight privacy screen, set Emerald Green about 3 to 4 feet apart so they knit into a solid wall. Give Green Giant 5 to 6 feet instead, because it grows far wider and crowds itself if you plant it close.

One plant in my north-line screen yellowed and thinned out within its first season, while the eight on either side of it stayed deep green and full. I set the whole row in a single afternoon, along the open field by the neighbor's place. The soil and water were the same for every plant. I lifted that one, found the trunk sitting two inches below grade, and reset it with the root flare right at the surface. By the next spring it had caught back up to its neighbors, no fertilizer involved.

Arborvitae is more forgiving than most evergreens about heavy ground. Per NC State, it handles clay and wet sites that would kill a spruce or a juniper outright. What it can't survive is the extreme on either end, so steer clear of bone-dry sand and low spots that hold standing water for days after a storm.

Most of the work in arborvitae care happens in the first couple of years. Once the roots take hold, this is a low-maintenance plant. It shrugs off clay soil, air pollution, and even the black walnut roots that kill so many other shrubs. You front-load the effort early, then stand back and let it grow.

Watering arborvitae is where the numbers matter most. An established plant wants about 1 inch of water per week. A new transplant can take up to 2 inches per week right up until the soil freezes. Mulching locks that water in, so skip it and you lose half to the sun and wind. Spread it 2 inches deep on clay and 4 inches deep on sandy soil, out to the drip line, and keep it a few inches off the trunk.

The most important watering of the whole year is the last one. Think of the roots as a sponge heading into winter. You want them fully charged in late fall so the plant can ride out frozen ground, because once the soil locks up the roots cannot drink at all. One deep soaking before the freeze does more to stop winter burn than any spray you can buy. The seasonal arborvitae care calendar below walks you through each step.

Two timing mistakes undo all that good work. Pruning in late summer and feeding in fall both push out tender new shoots with no time to harden off, and the first hard freeze burns them. Hold your fertilizer for spring, and once the plant is settled you will spend far less time on it than almost anything else in the yard.

Here is the one rule that changes how you approach pruning arborvitae at all. The plant will not regrow from bare wood. Cut a stem back past the green foliage into the brown interior, and that spot stays bare for good. So the question people ask most, can you cut the top off an arborvitae, has a hard answer: not without leaving a permanent flat scar.

"It'll bush right back out, you'll see," my neighbor said, leaning over the fence while I checked the Emerald Green row along my north line. One had pushed up past the power line, and he swore topping it would fix that. So I sheared the crown flat on that one plant. Three years later it still wears a flat brown top, while the row beside it tapers to a clean point. I watched that cut crown all season and it never pushed a single new shoot.

The reason is botanical, and it is simple. Conifers like arborvitae do not carry dormant buds along their old woody stems the way many shrubs do. New growth comes from the green, leafy tips and nowhere else. Take the foliage off and there is no hidden bud waiting to sprout. So topping arborvitae to bring down its height leaves you a flat-topped plant for life.

This is not a niche worry. The same no regrowth from bare wood rule shapes how you handle deer damage, winter burn, and crowding too. It applies to every one of them. Extension experts put it plainly.

So what should you actually do? Light shaping is the whole job. As for when to prune arborvitae, aim for late winter or early spring, right before new growth starts. Snip into green foliage to tidy the shape and you keep a clean, full plant for years.

If the plant has simply gotten too big for the spot, do not fight it with the shears. Pull it and plant a smaller variety in its place. A dwarf or columnar type that tops out at the height you want will always look better than a full-size plant you keep hacking down. You get the form you wanted without a single bare gap to hide.

That brown, scorched look your arborvitae wears by March is arborvitae winter burn, and it is dehydration in plain sight. The plant keeps losing water through its foliage all winter, but the frozen ground locks the tap shut so the roots cannot resupply it. The needles dry out and die from the tips down, worst on the sunny, windy south and west sides.

This drying out is called winter desiccation, and it hits hardest on recent transplants and plants pushed to the edge of their cold tolerance. Sun, wind, and reflected heat off a wall all speed it up. Road salt makes it worse too, which is why a plant near a salted driveway often browns first.

Most advice tells you to wrap the plant tight in burlap and spray it with an anti-desiccant. Both of those miss the mark. A tight wrap traps moisture and invites disease. The sprays have limited benefit too. They break down fast and need reapplying after every rain or snow. The real protection comes from water in the roots and a burlap barrier set against the wind.

Start with deep fall watering so the roots go into winter fully charged, then build the rest of your defense in order. Here is how to do it right.

Notice that every step on that list happens before the first hard freeze. That is the whole game with winter burn. Once the foliage browns there is no spray and no quick fix that brings it back, so all your effort belongs in fall while the soil is still soft enough to drink.

Most arborvitae problems share one cruel twist. The plant cannot grow new foliage from bare wood. So the gaps that pests and disease leave behind tend to stay bare for good. That one rule shapes how you face every threat below. You protect the plant first, and you rarely get to fix it later.

Think of an arborvitae hedge as a deer salad bar in winter. It is the most browse-prone evergreen on offer, and hungry deer will strip the bottom 4 feet down to sticks once the snow buries their other food. So no, arborvitae are not deer resistant in any real sense, and you have to plan your defense before the first hard freeze.

Deer are the headline threat, but they are not the only one. Arborvitae deer damage is just the start. Bagworms, spider mites, root rot, and tip blight send plenty of plants to an early grave too. Here is how to spot each one and what actually works against it.

Notice the pattern across all four problems. Whether the cause is bagworms on arborvitae, mites, rotted roots, or blighted tips, the foliage you lose is foliage you keep losing. A scratch test settles it fast: green under the bark means the branch lives, while dry brown wood means that section is done for good.

People often ask are arborvitae deer resistant, or if browsed branches bounce back in spring. The honest answer points to prevention. Fencing, netting, and repellent before the damage beat any hope of a comeback. The plant just will not green up bare wood. The federal data shows how badly deer want these trees.

The whole job with an arborvitae shrub comes down to a few choices you make before the plant ever goes in the ground. Pick the right variety, give it the right spot, and most of the hard work is already behind you. Get those wrong and no amount of fussing later will fix it.

Match the plant to the space first. Emerald Green holds a tidy 12 to 15 feet. That makes a clean privacy screen along a fence or property line, and it never swallows the yard. Need a fast, tall wall? Green Giant is the best arborvitae for privacy, since it climbs toward 40 to 60 feet and shrugs off deer better than most. Then give either one full sun, well-drained soil, and room to fill out.

The rest of good arborvitae care is short and seasonal. Water deep through fall until the ground freezes, and that one habit does more to stop winter burn than any spray on the shelf. Keep deer off the lower branches with fencing or repellent through the cold months. None of it takes much time once the plant is settled.

Here is the point that ties it all together. Arborvitae will not grow back from bare wood, so a gap from deer, a bad topping cut, or a crowded spot stays a gap. That single fact is why the front end matters so much. A tree this species can live past 400 years, and people once called it the tree of life. Plant the right one in the right place and you are not buying a chore for the season. You are setting up a green wall that stays full and quiet for decades.