- Grow Guide for Thuja ‘Green Giant’ Arborvitae
- Green Giant Arborvitae Care
- Thuja Green Giant
- The Fastest Growing Quality Evergreen
- Planting & Care
- Green Giant Arborvitae
- Green Giant Arborvitae Spacing
- Green Giant Arborvitae Plant Facts
- Caring For Thuga Evergreens: How To Grow A Green Giant Arborvitae
- About Thuja Evergreens
- Growing a Thuja Green Giant
- Thuja Green Giant in 2 1/2″ pots – 100 Minimum Order
- Thuja Green Giant Privacy Screen
- Thuja Green Giant Privacy Screen Features
- The Beauty of the Thuja Green Giant
- How to Create A Thuja Green Giant Privacy Screen
- Thuja Green Giant Care
- My new plants look dull and the ends of some of the branches are turning brown
- My plants look yellowish, not bright green, and they aren’t growing
- There are strange-looking clusters of dry needles hanging in the tree
- I have something sticky on my leaves, and black powder on them too
- Poor growth, and branches are dying
- In the End
- Plant Care 101: Thuja Green Giants
- Thuja Green Giants: Background
- Pruning and More
Grow Guide for Thuja ‘Green Giant’ Arborvitae
A row of Thujas line a pond to create the perfect look.
Thuja Green Giant tree has become one of the most popular trees for creating a living screen. It’s no wonder: Green Giant is an evergreen plant throughout the year; it is adaptable to most soil types; it is tolerant of light shade and of moderate drought; and it grows extremely fast. Thuja arborvitae has been called the tree of life in latin and was brought to North America to be put in the United States National Arboretum in 1967 from Denmark.
You may be wondering how fast do arborvitae grow? The thuja green giant arborvitae growth rate puts on 3-5 feet per year of height. A row of rich Green Giants will quickly create a privacy screen that blocks the wind and snow, and blocks the view. The dark green foliage of the green giant plant can grow in a wide range of soils. The green needles may darken to reddish brown or bronze slightly in winter.
Thuja ‘Green Giant’ is a large tree hybrid between the American native, western redcedar (Thuja plicata), and the Asian native, Japanese arborvitae (Thuja standishii). Thuja Green Giant evergreen trees grow faster and are said to stay bright green in winter than either parent. It is more cold hardy than the Japanese species and more tolerant of a lethal fungus (Didymascella thujina) than the American species.
Green Giant Arborvitae Size
The big Green Giant is capable of reaching up to 60 feet tall, with a 15-20 feet wide spread across its bottom at full maturity.
In cultivation, Thuja plant ‘Green Giant’ is superior to most all other fast growing evergreen conifers for many reasons.
Thujas create excellent privacy between neighboring houses
Because of its fast growth rate, Green Giant is among the best choices for a quick evergreen hedge or screen, privacy fence, or wind and snow break. A row of giant thuja trees along your property line as a screen plant will protect more vulnerable plants and your home from damaging winds.
Line the driveway with a row of emerald green arborvitae plants to create a barrier that keeps drifting ice and snow away. With lower branches that will eventually extend way out beyond the trunk, Green Giant has a tall, imposing narrow pyramidal habit and can sometimes be conical shaped. However, it can be kept compact by regular pruning. In fact, Green Giant responds well to clipping and pruning, even to moderate shearing. The best time to prune thujas is in the early spring.
Planting Arborvitae: Site Selection
Green Giant performs best on moist, fertile, well-drained, loamy soils in full sun to partial shade. It will not survive on varieties of soils that are wet sites, poorly drained, or ones that stay soggy, and it doesn’t like highly compacted soils. Ideal conditions in USDA planting zones 5 and 6, at least 6-8 hours of direct sunlight is best; in warmer climates, a little shade, especially in the afternoon, won’t hurt. Check out our Where Should I Plant Thuja Green Giant blog for more info. As always, perform a soil test if you are unsure.
As a majestic sentinel tree, Green Giant has few equals. A pair of Green Giants on opposing sides of the yard will frame your landscape in grandiose form. In a larger yard or park, position a cluster of three Green Giants for a positively regal focal point.
Thuja Green Giant Arborvitae Spacing
For a living privacy screen or hedge, a windbreak, or a snow break, position Green Giants 5-6 feet apart. Or better yet for a unique green giant hedge, plant them in two rows, 4 feet apart, with the trees staggered 8-15 feet apart within each row. The row(s) should be at least 6-8 feet away from any building, driveway or road. Thuja green giant arborvitae spacing is important so the landscape trees can grow to their maximum potential.
How to Plant Green Giant Arborvitae Tree
If your soil is very compacted, you should consider tilling before digging the individual planting hole(s). You can plant any time of the year, but the best time for planting a new tree is in spring, before it gets too hot, while still allowing a whole growing season before winter to establish a strong root system.
Newly planted green Thujas will need plenty of water the first growing season to establish strong roots.
Before starting, thoroughly water the soil in the nursery pot so that the Green Giant’s roots are fully wetted. Place the pot on its side and slide the root ball out.
If the plant is stuck, you can slip a long-bladed knife around the inside edge to loosen it. Gently loosen some of the roots along the sides and bottom of the root mass, and pull them outward so they are not encircling the root mass. It shouldn’t be necessary to prune any of the roots unless they are wound around the circumference of the pot. In that case the offending roots should be shortened so that when they are in the ground they will grow outward and not continue growing in a circle.
Dig a hole twice as wide and a little deeper than the container the Green Giant arrived in. Do not add any evergreen fertilizer or amendments. Mound up some soil in the middle of the hole, 3-6 inches high, and place the center of the root mass on top of the mound, spreading roots out in all directions around the hole.
Begin filling in the hole. Backfill until the top of the root mass is at the same level it was in the original nursery pot, never lower. You may have to pull the plant up as you backfill. When the hole is half filled, give it a good soaking of water. When the water has drained, readjust the depth of the stem if necessary and finish filling in the hole. Gently tamp the surface of the soil around the root ball down with your hands to ensure there are no air pockets near the plants roots.
Mulching is essential to maintain moisture for newly planted arborvitae trees
Build a 3-6 inch high dike of soil on the surface around the outside of the root zone. This will impound water over the roots as it sinks into the soil. Water your trees thoroughly. Spread an organic mulch 3-6 inches deep over the root zone and beyond to help hold in soil moisture and prevent weed growth. You can use hay, straw, leaves, pine needles, bark or wood chips, grass clippings, or compost. Keep the mulch 3-4 inches out from the trunk. Do not fertilize at this time.
Wondering how often to water thuja green giant?
Water every day or two for the first 2-3 months, until the plants are established. After that, they should get one inch of water every week or ten days. If you’re having a dry spell, or your soil is very sandy, you should water more often. Once the large dtrees are established, they are very drought tolerant.
The most common reason for any newly planted tree to die is lack of water.
Your Green Giant shrub will need about an inch of water, either from rainfall or irrigation, per week. Renew the mulch layer as needed to protect the roots from drying out, freezing, or overheating, and to smother weeds. Use an organic mulch that will decompose and add nutrients to the soil. Try to maintain a mulch layer 3-6 inches deep around the tree at all times, but keep it a couple inches away from the trunk itself.
Green Giant Arborvitae Care
With just a little care and maintenance you can have a thuja tree thriving in your landscape in no time. These trees get very large and start growing as soon as they are planted. Start fertilizing and pruning them as young trees to ensure they grow healthy. It may be necessary to protect during the cold months as a young tree to stop winter burn.
Green Giant Arborvitae Fertilizer
Fertilize Green Giants each spring with a balanced fertilizer, or one with a higher concentration of nitrogen. Slow-release fertilizers are best like the one Perfect Plant’s offers. Follow label directions and be careful to not over-fertilize.
Pruning Green Giant Arborvitae
Without any pruning, Thuja ‘Green Giant’ will grow into a stately pyramidal shape with foliage that stays dense all the way to the ground. After its first year of growth, it can be pruned to fit your needs. To maintain a low hedge shape, you will need to shear several times during the growing season.
Thujas are relatively disease free, but check out our Pests and Diseases of Thuja Green Giant blog for more information if you are dealing with issues. They are also deer resistant so you don’t have to worry about those critters eating your trees. One way to know if something is wrong with your thuja is by watching the evergreen needles. If they change color, turn brown, fall off you know that something is wrong.
You simply cannot go wrong with Thuja Green Giant – they are the fastest growing evergreen trees, can provide privacy in as little as a year, and Perfect Plants has many size options to get you the exact tree you need! Want a similar tree that does not get as large? Check out Leyland Cypress for another easy to grow evergreen.
Please let us know any questions you may have in the comments section below.
Thuja Green Giant
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The Fastest Growing Quality Evergreen
Why Thuja Green Giants?
The Thuja Green Giant quickly gives you a lush, rich privacy screen (3-5 feet per year once established). And it’s:
– Drought tolerant
– Disease and insect resistant
– Easy-to-grow and very adaptable
You can block out neighbors while taking very little yard space. Thuja Green Giants grow in a uniform shape and height. You get that classic French Renaissance look without having to prune or shear. In fact, you don’t have to do anything to them. They’re drought tolerant and have no significant insect or disease problems.
So, you’ll never have to worry about mixing chemicals or spraying these trees. With proper care, Thujas aren’t typically prone to deer or bagworm problems. This is a tough tree. Resists ice and snow damage. Grows in almost any soil, even sandy loam or heavy clays. Prefers direct sunlight, but also does well in partial shade.
The Thuja Green Giant is the perfect fast-growing evergreen for a privacy hedge or windscreen. Plant one every 5 to 6 feet and they quickly create a dense barrier. You can easily trim them once a year to your desired height. Left unpruned, Thuja Green Giants planted in rows can reach as high as 30 to 40 feet. Your Thuja foliage stays soft and thick all year long.
Why Fast-Growing-Trees.com is Better
Some nurseries dig Thujas out of the ground and send them bare-rooted, or ‘ball and burlap.’ This can leave up to 90% of the roots behind. The tree can lose up to a year of growth while struggling to replace its root system. You also risk losing the tree, since it’s less able to absorb vital nutrients and water.
Our Thuja Green Giants are hybrids grown from branch cuttings – not from seed. They need to grow below the ground before they can grow above the ground. Some nurseries sell freshly rooted cuttings, which can take up to a year to reach the size and root mass of our one gallons.
But you can be assured that when you order from Fast Growing Trees, you are getting well-rooted Thuja Green Giants, ready for explosive growth. And for quickest privacy, we now have a limited supply of large trees available. These larger trees offer more developed branching for ready-made privacy in your landscape.
Order your own Thuja Green Giant before it’s gone!
Planting & Care
1. Planting: This is a large landscape tree and as such, requires a bit of planning before planting. First, measure the area where you would like to plant your hedge or row. You will need the length of the area of planting to estimate the number of trees you need.
When planting, dig a hole for each tree that is three times as wide as the root ball but just as deep. You don’t need to add anything to the planting hole. Place the tree, fill in around the tree with the same soil you took out when initially digging the hole. Finally, tamp down as you fill to cut back on any air pockets from forming, water the tree, then mulch to conserve moisture.
2. Watering: For the first two weeks, water your new tree every other day by holding a hose around it and counting to 20. If you don’t have a hose, 2 large watering cans full of water will do (smaller trees may only need a light soaking so a single can may suffice).
During the second two weeks, switch to watering every three days with the same method mentioned above. After the first month, water once a week unless it is dry and hot (no rain and temperatures above 80 degrees). If it is hot and dry, water twice a week. After the first six months, the trees will be established and won’t need any extra water. Your natural rainfall should be sufficient at this stage.
3. Fertilizing: Your Thuja should not need any extra fertilizer unless your entire lawn and garden have problems and needs regular fertilizing. Apply a balanced tree and shrub fertilizer at the beginning of spring.
4. Pruning: You won’t have to prune this tree if you are growing it with enough space for it to maintain its naturally graceful pyramid shape. If you’re growing several close together as a hedge, you can shear the plants yearly after the final frost.
FGT Tip: Possibly the best feature of this evergreen is that deer don’t favor the taste. If you live in an area with heavy deer pressure, spray your Thuja Green Giants every 3 to 6 months with deer repellent. That’s all the protection you need.
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Green Giant Arborvitae
- USDA Hardiness Zones 5 – 8
- Height 40 – 60 Feet
- Spread 12 – 18 Feet
- Partial Sun to Full Sun
The Green Giant Arborvitae, Thuja plicata ‘Green Giant’, is the fastest growing evergreen shrub that we know of. Commonly used for privacy hedges, these will typically grow 3 to 5 feet per year once established. These also do great as windbreaks, especially during harsh winters. This bush can grow in very cold conditions, up to growing zone 5. It also resists ice and snow damage. The columnar and upright habit does not require pruning. So you get a very tall plant without taking up a lot of space.
The Green Giant Arborvitae is drought tolerant, insect and disease resistant. The green color of the foliage lasts all year. So you can have beautiful shrubs (some people call these trees) year round with minimal work! These are sometimes called the Western Red Cedar as well.
These can grow in a wide range of soils, even in heavy clay. The plant does better in well drained soil, but it is not required. We recommend applying a layer of mulch around the base of the plant to help retain moisture, and protect the roots in harsh weather conditions. Fertilizing is not necessary. But if you would like to, do so with a common evergreen fertilizer in early spring.
Pruning Green Giant Arborvitae is not necessary. If you plant as a hedge, you can trim the plants once a year. It is best to do this after the final frost. These plants grow very large, so if your space cannot handle it, it is best to plant a different variety of arborvitae instead of the Green Giant and having to prune them all the time.
Green Giant Arborvitae Spacing
If growing these into a privacy hedge or wind block, plant these 5-6 feet apart, center on center. If you wish to have the shrubs grow into a pyramidal/conical form, plant the trees 14 feet apart in a row.
These plants grow very large, so do not plan on growing anything underneath of these. And be sure to not plant under power lines or too close to a home.
Green Giant Arborvitae Plant Facts
USDA Hardiness Zones: 5-8
Flower Color(s): n/a
Bloom Period: Grown for Foliage
Foliage Color(s): Green
Light Exposure: Full Sun
Height: 40-60 Feet
Spread: 12-18 Feet
Features: Interest Year-Round
Scientific Name: Thuja (standish x plicata) ‘Green Giant’
Common Name: Green Giant Arborvitae
Caring For Thuga Evergreens: How To Grow A Green Giant Arborvitae
Few garden plants grow faster or taller than the Thuja Green Giant. This enormous and vigorous evergreen shoots up rapidly. Thuja Green Giant plants quickly tower above you and, in a few years, grow taller than your house. For more information about Thuja Green Giant plants, also called Green Giant arborvitae, read on.
About Thuja Evergreens
Trees and shrubs in the Thuja genus are fast-growing evergreens. They are more commonly known as arborvitae and feature dark green foliage. Some species develop bronze streaks in winter. While arborvitaes have lost some of their popularity with gardeners in recent years, the cultivar ‘Green Giant’ is an exceptional plant. A vigorous and beautiful evergreen, Green Giant (Thuja x ‘Green Giant’) grows rapidly into a pleasing pyramidal shape.
Green Giant arborvitae have flattened sprays of scale-like leaves. The foliage is bright green and darkens a little in the colder months. It never bronzes like the Oriental arborvitae. Look for a white line on the bottoms of the leaves of these plants. It is faint but adds a touch of brightness to the foliage.
Growing a Thuja Green Giant
If you are thinking of growing a Thuja Green Giant, you’ll need to measure the potential growing site. These Thuja evergreens, which were imported from Denmark several decades ago, grow into enormous plants. Green Giant arborvitae shrubs may be small when first transplanted. However, they grow quickly and mature to some 60 feet (18 m.) tall with a basal spread of up to 20 feet (6 m.).
Obviously, you won’t want to start growing one, or even a few, in a small garden. These trees are great choices if you want to create a large, evergreen screen, however. Often, the size of these evergreens limit their use to parks and large properties where they make excellent, year-round screens.
Growing a Thuja Green Giant doesn’t require exceptional effort if sited appropriately. These plants thrive in U.S. Department of Agriculture plant hardiness zones 5 through 7. If you are wondering exactly how to grow a Green Giant in these zones, find a sunny site large enough for to accommodate its mature size. Consider both the mature height and breadth.
The type of soil is not critical since most soil types, from sandy loams to heavy clays, are suitable, although they prefer deep, moist loam. They accept either acidic or alkaline soil, and transplant easily from a container.
When you are considering how to grow a Green Giant, remember that these are easy-care plants. You can shear them if you like, but pruning is not necessary. Irrigate them during dry weather even after establishment to ensure that your plants stay healthy.
Thuja Green Giant in 2 1/2″ pots – 100 Minimum Order
Thuja Green Giant Arborvitae in 2 1/2″ containers
- Shipped in pots, not bare root.
- Vigorous new crop! 9″ average height above pot. Well-rooted.
- Guaranteed healthy upon arrival.
Thuja Green Giant Arborvitae is our best selling fast growing tree. Because of its disease resistance, Landscape Architects are using Thuja Green Giant Arborvitae more often in their designs. Thuja Green Giant grows 3 feet per year once established.
Thuja Green Giant Arborvitae reaches 50 feet tall or can be sheared to desired height.
Thuja Green Giant Arborvitae adapts to a variety of soil and likes full sun to partial shade.
Hardy in zones 5 – 8.
Plant 4 – 6 feet apart for a dense screen. The Thuja Green Giant trees we are offering are from the same source used to grow the 2011 SC State GRAND CHAMPION Christmas Tree.
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Unless otherwise requested, we ship trees the first available Monday or Tuesday after payment is finalized. If you’d like a later ship date, just let us know.
Thuja Green Giant Privacy Screen
Thuja Green Giant trees are easy to grow evergreens used mainly for privacy screening. Extremely popular for their fast growth rate and hardy nature, these attractive arborvitae have quickly beat out Leyland Cypress as the number one choice for living fences.
Thuja Green Giant Privacy Screen Features
With potential growth rates of 3 to 5 feet per year and disease resistance the Green Giant Arborvitae is an excellent choice for a privacy screen. It is also low maintenance and drought tolerant once established. This is an easy to grow tree even for the novice gardener. This fast growing evergreen tree is considered the best tree for privacy from neighbors.
The Beauty of the Thuja Green Giant
The emerald green foliage of the Green Giant Thuja cascades down its branches into a feathery point. The fragrant foliage is soft to the touch making it perfect for families with children and pets. This Thuja has natural flowing branches while still maintaining a classic pyramidal shape. Growing to 60 feet tall and 15 feet wide the Thuja Green Giant is a substantial tree.
How to Create A Thuja Green Giant Privacy Screen
For almost instant privacy diagonally stagger your trees 6-8 feet apart. For a traditional straight hedgerow, plant your Thuja Green Giants 5-6 feet apart.
Get creative! Plant in curves or slight s-forms and keep it flowing. Inside those unique curves, add some drama and flare with colorful plants like Drift Roses, Junipers, Abelias, and Azaleas.
Thuja Green Giant Care
Thuja Green Giants grow best in full sun but can tolerate some shade. They are adaptable to just about any soil as long as there isn’t standing water. I would recommend amending a heavy clay soil with some planting mix to improve soil quality and drainage.
Thuja trees need to be watered heavily at the time of planting. Be sure not to let your new trees dry out within the first few months before they are established. While Green Giants are drought tolerant once established, watering deeply once a week or so during periods of drought will improve the growth rate and even the health of your trees. Adding 1 to 2 inches of mulch will help hold in moisture, protect the roots, and keep weeds at bay.
Thujas love to eat! For the best growth rate fertilize once or twice a year with a balanced slow release fertilizer.
Thuja Green Giants do not require pruning. They easily maintain their natural pyramidal habit throughout their lives. If a certain shape or height is desired however pruning is tolerated well by this evergreen. Pruning the top of your thuja may slow upward growth, but increase outward growth.
Plant Thuja Green Giants in growing zones 5 to 9 for best results.
Now you know all about Thuja Green Giant Privacy Screen! Shop our privacy tree collection for more privacy screen options.
The short answer to this question is ‘NO’, but despite the toughness and resistance of this great evergreen, problems can very occasionally develop, some caused by growing conditions and some by specific pests or diseases. Don’t worry, these problems are rare, and most gardeners never see any problems at all with their plants. So that you can be equipped to deal with anything that may seem to be going wrong, it’s time for some advice. So here are some things you may see, and what to do about them.
My new plants look dull and the ends of some of the branches are turning brown
New plants of Thuja Green Giant need plenty of water. When they are first planted they only have roots in the root ball from the pot. Especially if the surrounding soil is a bit dry, those roots won’t be able to take up water and this will first show by the ends of the branches bending over and beginning to turn brown. If the weather is warm you may need to water your plants every second day for the first few weeks after planting. Otherwise water them at least once a week. New plants need plenty of water to establish in your garden, so don’t forget them – they need you!
My plants look yellowish, not bright green, and they aren’t growing
Especially when young, these fast-growing plants need lots of nutrients. They don’t have a big root system yet to get enough from the soil around them. So they can easily run low on essential food elements, grow more slowly and show a characteristic yellowing of the leaves. If you see this, it is time to start fertilizing your plants. For young plants choose a water-soluble fertilizer formulated for evergreen hedges and apply as directed. If your plants are older, then a granular fertilizer will be lower-cost and quicker to apply. Modern slow-release fertilizers cost a little more, but they only need to be applied once a year and they will continue to feed your hedge all season long.
There are strange-looking clusters of dry needles hanging in the tree
These could be bagworms. This is a common pest of some arborvitae trees, and it is occasionally found in Thuja Green Giant. Since this tree is so tough and hardy, they are only very rarely attacked by this insect. If you see what look a bit like hanging greenish or brown ‘cones’ one or two inches long on your plants, then you have bagworms. Inside there is a green caterpillar that will eat the leaves, and can make parts of the bush very bare. If you just have a few, or your plants are young, then simply pick them off and throw them into a bucket of hot, soapy water. The caterpillar makes the bag out of silk and pieces of the plant it has chewed off. Once you remove the bags your trees will quickly grow back. If you have larger bushes, or a lot of bags, then spraying with Bt (pronounced ‘bee-tee’) or Spinosad. Ask at your local garden center for specific brands of these safe, non-toxic sprays made from naturally occurring microbes. These products only kill caterpillars and they will not hurt other insects, animals or humans. Since bagworms usually don’t attack Thuja Green Giant at all, you will probably never see this pest on your hedge.
I have something sticky on my leaves, and black powder on them too
Again, this is a very rare problem, but it can happen. The stickiness comes from sap being taken from the plant by scale insects. The black (or occasionally white) growth is fungus growing on the sugary sap. Neither the sap or the fungus will hurt your plants, but the little scale insects, that look like brown pimples on the stems, do weaken the trees and can cause browning. Luckily Thuja Green Giant grows so fast and so vigorously that scale is rarely a problem. If you see areas like this, usually you can trim them away, clean up carefully, feed and water your trees and they will quickly recover. Only very rarely, perhaps if your trees are growing in poor, dry soil, will scale be bad enough to need spraying. Ask at your garden center for something suitable.
Poor growth, and branches are dying
Although your trees need water, they can have too much of a good thing. If the soil is constantly wet no air gets to the roots, and they die and rot. If your plants are not growing, well, and parts of them turn brown and die, or if a whole plant in your hedge dies, you may have root rot. Once the symptoms show it is hard to do anything, so first make sure you plant in an area with good drainage. If you need to plant in a badly-drained spot, then mound up the soil and plant on that mound. If the plants are a few inches above the soil the roots will get more air. If you have an irrigation system, check that you don’t have a leak, or reduce the watering time. Your plants should get plenty of water, but the soil should become a little dry in between each watering.
In the End
Thuja Green Giant is one the most pest and disease resistant plants you can grow, so if you give them a little basic care with water and fertilizer the chances are very good you will never see any problems at all. Now that you know what to look for, you can take some simple steps to deal with any rare problems that might come along.
Plant Care 101: Thuja Green Giants
When we say Green Giant, we’re not referring to the Jolly Green Giant mascot associated with canned and frozen vegetables. We’re referring to the Thuja Green Giants.
When we say Green Giant, we’re not referring to the Jolly Green Giant mascot associated with canned and frozen vegetables. We’re referring to the Thuja Green Giant. You can’t have ‘giant’ in the name of a plant that doesn’t get massive, so this tree lives up to its name. Quickly growing to heights of 20 to 40 feet tall, the rapid growth of Thuja Green Giantsmakesthemthe perfect candidates for large privacy trees.However, Thujas are beautiful ornamental trees with a variety of uses.
Thuja Green Giants: Background
Thuja Green Giants are commonly known as arborvitaes, a word derived from Latin that means tree of life. They’re called trees of life because their sap can supposedly be used for medicinal purposes. This covers all varieties of Thujas, from the Nigra Thuja to the Thuja Green Giant.
The Thuja Green Giant is actually a cross between two different Thuja varieties: namely, theStandishii and Plicata varieties.
The Thuja Standishii is a Thuja variety that’s native to Japan and commonly gets 20 to 35 feet tall. The Thuja Plicata is a variety native to North America that gets 65 to 70 feet tall. When they come together to form Thuja Green Giants, they make a beautiful, fast-growing evergreen with a pyramidal shape. They also boast strongpest and disease resistance, and high level of cold hardiness.
Thuja Green Giants are recommended for growing zones 5 through 9. They’re cold hardy down to about -20 degrees and can even put up with the snow since they boast strong, durable branches. Furthermore, if you line your driveway with Thujas, they’ll create a barrier that prevents snow from building up.
The thick foliage on Thuja Green Giants creates a tough barrier against the wind as well. Cold, harsh winds can be damaging to smaller trees and shrubs. Cold blasts also hit homes and cause people’s heating bills to go up.
And if you need privacy fast, then Thuja Green Giants are the way to go. Once you plant them, they’ll take off, growing between 3 and 5 feet a year. People love to plant them in order to create a living fence. Thujas may get quite large, up to 40 feet tall and 6 to 12 feet wide, but they respond very well to pruning for your desired height.
Best of all, the Thuja’s exterior light and feather foliage give it an attractive texture, while its interior dark green foliage with slight yellow hues make it pop. This conifer’s pyramidal shape is also very attractive to the eye.
However, if these trees are planted in a row they often provide a beautiful solid backdrop to flowering trees and shrubs.
Thuja Green Giants are extremelylow-maintenance. To plant your Thuja, select a site that receives full to partial sunlight – they will grow more quickly in full sunlight. Six hours of direct sunlight a day will suffice.
And your natural soil will be fine for your Thujas. They can adapt to a huge variety of different soil types, ranging from sandy to heavy with clay. Although they prefer slightly acidic soil, they adjust fine to soils that are alkaline and very acidic.
Speaking of soil, keep it moist but not soggy or oversaturated. Thujas won’t do well if they sit in standing water, so avoid low areas of your yard where standing water could collect. However, these arborvitaes get thirsty often. Water your Thujas three times a month during the summer months, and twice a month during the colder months. If you experience periods of drought or extreme heat, water your trees more often.
Additionally, you can help your soil retain moisture by placing a 3-inch thick layer of mulch around the tree’s base. The mulch will also keep weeds away and regulate soil temperature. Mulch will keep your soil warm in the winter and cool in the summer.
Pruning and More
It’s easy to tell when Thujas aren’t getting enough water: their needle tips will start to turn brown or the foliage will look dull, yellowed and weak. Signs of overwatering include drooping branches and discoloration of the branches.
Generally, Thuja Green Giants don’t need to be fertilized. But you can give your Thujas a boost once or twice a year with a well-balanced, slow release fertilizer, like formula 10-10-10 or 14-14-14. If you choose to fertilize your Thujas, do so in the early spring after the final frost of the season or in the early fall.
Even better, no pruning is required for Thuja Green Giants. They’ll quickly reach their massive heights if left untouched. You can promote wider growth that spreads out into a bushier formation by cutting back around a third of the tree’s central leader. With hand pruners or shears, you can cut and shape your Thujasas desired. You can even mold Thujas into hedges that are flat across the top, as long as their width is at least 6 inches.