Emerald green arborvitae (Thuja occidentalis ’Smaragd’) is one of the most widely planted evergreens in North American landscapes. The cultivar earns its name from the glossy emerald tone of its flat, spray-like foliage, the same color family that interior designers reach for when they want a calm green room; green dining room design leans on sage, emerald, and olive tones for exactly that effect. In the yard, the needles hold their color through winter, which is why the plant anchors hedges, screens, and foundation plantings across cold-climate zones.
Arborvitae are drought-resistant once established, tolerate cold well, and rarely suffer serious pest or disease problems. They grow fast enough to form a screen in a few seasons, top out around 12 to 15 feet, and respond well to pruning. This article covers cultivar selection, planting, browning problems, seasonal care, and what a mature hedge is worth to a property, with the spacing and growth numbers you need to plan ahead.
Choosing the Right Arborvitae Cultivar
All arborvitae belong to the genus Thuja, and two major types dominate the market: eastern arborvitae (Thuja occidentalis), native to the eastern United States, and giant arborvitae (Thuja plicata), native to the Pacific Northwest. Within each type, cultivars differ sharply in mature size, growth rate, and cold hardiness, so the first decision is matching the cultivar to the space. Green giant arborvitae, for example, screens quickly but needs far more room than Emerald Green will ever use.
Emerald Green Versus Green Giant
The two most common screen cultivars sit at opposite ends of the size spectrum, and the comparison settles most spacing arguments:
| Cultivar | Mature height | Mature width | Growth per year | Hedge spacing |
|---|---|---|---|---|
| Emerald Green | 12 to 15 feet | 3 to 4 feet | 6 to 12 inches | 3 to 4 feet apart |
| Green Giant | 40 to 60 feet | 12 to 18 feet | 3 to 5 feet | 5 to 8 feet apart |
Matching Cultivar to Site
Emerald Green suits tight lots, foundation corners, and low hedges where 15 feet of height is plenty. Green Giant belongs on open property lines where a tall, dense screen is the goal and the soil can support a wide root zone. Middle-ground cultivars such as Techny and Woodwardii fill the space between, with moderate growth and broad cold hardiness.
Why Emerald Green Foliage Turns Brown
Browning is the most common arborvitae complaint, and the causes divide into environmental stress, pests, and site problems. Homeowners who recognize the patterns can usually stop the damage before a branch dies back, and the troubleshooting steps for arborvitae turning brown apply to Emerald Green more than most cultivars because its tight foliage holds moisture against the inner branches.
Common Causes of Browning
- Winter burn: cold wind and frozen soil pull moisture from the needles faster than the roots can replace it, browning the windward side.
- Drought stress: newly planted trees with small root balls brown from the inside out when watering stops too soon.
- Dog urine and de-icing salts: concentrated nitrogen and salt burn the foliage at the base of the hedge.
- Spider mites and bagworms: mite feeding stipples the needles a dusty bronze, while bagworms defoliate whole branches.
- Root problems: saturated clay soil suffocates the roots and shows up as browning in scattered sections of the canopy.
Winter Burn Prevention
Water deeply before the ground freezes so the roots enter winter fully hydrated. In exposed sites, wrap the hedge in burlap or put up a wind screen on the prevailing-wind side. Anti-desiccant sprays add a waxy coating that slows moisture loss from the needles and need reapplication after heavy rain. Avoid shearing in late summer, because tender new growth is the first tissue winter burn attacks.
Planting an Arborvitae Hedge
Fall is the best planting window because cooler temperatures and seasonal rain reduce heat stress while the roots establish before spring growth. The steps for planting an arborvitae hedge for privacy and curb appeal start with a straight, well-drained line and end with a watering schedule that carries the trees through their first two summers.
Spacing and Soil Preparation
Spacing decides whether the hedge fills in evenly or chokes itself. Emerald Green planted 3 to 4 feet apart forms a continuous screen within a few years; wider spacing, 5 to 6 feet, keeps the specimens individual but leaves gaps longer. Dig the hole no deeper than the root ball and two to three times as wide, because the feeder roots spread through the top 12 to 18 inches of soil. Amending the backfill is optional, since arborvitae grow fine in native soil as long as it drains.
Fall Versus Spring Planting
Fall planting gives the roots a cool, moist season to establish before the next summer’s heat. Spring planting works in zones with mild summers if the trees get consistent water. Avoid summer planting in hot regions. Stake tall specimens only in windy sites, and remove the stakes after the first year so they do not girdle the trunk.
A planting sequence that works:
- Mark the hedge line with stakes and string so the row runs straight.
- Space the holes at the planned interval, measuring trunk to trunk.
- Dig each hole two to three times the width of the root ball and no deeper.
- Set the tree so the top of the root ball sits level with or slightly above grade.
- Backfill with native soil, water thoroughly, and spread 2 to 3 inches of mulch, keeping it off the trunk.
Hedges, Curb Appeal, and the Emerald Brand
A mature privacy hedge does measurable work for a property. It screens neighbors, deadens street noise, breaks wind, and frames the front elevation, and buyers consistently pay more for established landscaping than for bare yards. The word emerald carries the same weight off the lot: along the Gulf Coast, coastal property development and home construction in Florida’s Emerald Coast small towns wraps new homes in preserved greenery and sells the green association as part of the address.
Privacy, Noise, and Curb Appeal
The value shows up in three ways. Privacy turns a backyard into usable outdoor space, which appraisers treat as functional square footage. A dense evergreen screen cuts noise and wind at the source, trimming heating costs on exposed walls in winter. Curb appeal affects time on market more than sale price, because the front hedge is the first thing a buyer sees in the listing photos.
The Emerald Name Beyond the Yard
The name travels far from any hedge. Florida’s Emerald Coast took its name from the green tint of the Gulf water, and that branding runs through the region’s real estate market. A homeowner planting an Emerald Green hedge is buying into the same idea: green reads as established, cared for, and valuable.
Planning the Hedge for the Long Term
A hedge is a 30-year commitment, and the planning mistakes show up in year five rather than year one. Trees bought too small take longer to fill the line, trees spaced too tightly compete for water, and a hedge planted under a mature shade tree leans toward the light. The pattern of building and property development in secluded towns of Florida’s Emerald Coast shows the same lesson at neighborhood scale: green assets hold their value only when the plan accounts for mature growth.
Buying Healthy Specimens
A healthy 3-gallon Emerald Green costs more than a bargain-bin tree and repays the difference in survival. Look for foliage that is uniformly green with no bare interior, a trunk with no wounds, and a root ball that holds together. Pass on trees with dry, cracked soil balls or the browning patterns described earlier, because nursery stress compounds in the landscape.
Planning for Mature Size
The 3 to 4 foot mature width of Emerald Green sounds small until a row of them meets a walkway. Leave at least 2 feet between the hedge and paved surfaces so the foliage has room to breathe, and keep the hedge back from utility easements and property lines where crews may need access. Pruning is easier than moving a mature hedge, so plan the space first.
Removing and Replacing an Old Hedge
Every hedge eventually ages out. Dieback, storm damage, or a change in the yard’s layout can make removal the honest option, and the job has its own safety rules. The steps for removing arborvitaes safely and efficiently matter because a 15-foot tree with a dense root ball is heavy, awkward work that can damage nearby plants and grading if rushed.
Removal Steps
- Cut the tree down in sections, removing lower branches first and working from the top down so nothing falls onto surrounding plants.
- Dig around the stump to expose the main roots, then cut them with a sharp spade or root saw.
- Rock the stump to loosen it, or rent a stump grinder for large specimens.
- Refill the hole with topsoil, tamp it, and grade it to match the surrounding drainage.
- Loosen compacted soil before planting the replacement.
Replacement Options
The replant plan depends on why the hedge failed. If the old trees died from saturated soil, correct the drainage before planting anything new. If they simply aged out, a fresh row of Emerald Green at the same spacing restarts the screen in a few years. Mixing cultivars in one row creates an uneven hedge, so keep the replacement uniform, and time the work for fall.