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How To Grow and Care for Green Giant Arborvitae?

Green Giant Arborvitae

Are you tired of looking at the same dull landscape in your backyard?

Adding green giant arborvitae can be a game-changer.

These tall evergreens can add privacy, beauty, and value to your property.

But, growing and caring for these trees requires proper knowledge and attention.

This article will guide you through the process and help you achieve a stunning landscape that will leave your neighbors envious.

What Is Green Giant Arborvitae?

Green Giant Arborvitae is a popular type known for its fast growth, attractive pyramidal shape, and dark green foliage.

The plant is native to the United States and can grow up to 3 feet (90 cm) annually.

The tree has a broad, conical shape and is an excellent choice for creating a natural privacy screen or windbreak.

To maintain the desired height and width, regular pruning is necessary.

The foliage of Green Giant Arborvitae is a beautiful deep green color that stays vibrant all year round, making it an excellent choice for adding color and texture to your landscape.

It can grow in various soil conditions and tolerate full sun and partial shade.

Plant Green Giant in a Row

Planting Green Giant Arborvitae trees in a row will create a natural privacy screen faster than planting one tree at a time. The trees will grow together and create a more significant barrier.

How Long Does It Take To Grow?

Green Giant Arborvitae is known for its fast growth rate. It can grow up to 3 feet (90 cm) per year, reaching a mature height of 60-80 feet (18-24 m).

However, the growth rate of Green Giant Arborvitae can vary depending on a few factors, including the following:

  • Soil quality: Trees planted in nutrient-rich soil will grow faster than those planted in poor soil.
  • Climate: Trees planted in warmer temperatures will grow faster than those in colder climates.
  • Water: Trees that are regularly watered will grow faster than those that are not.

Provide proper care and maintenance to ensure your Green Giant Arborvitae grows healthy and consistently.

How To Grow Green Giant Arborvitae?

Thuja Green Giant
Source: Wikimedia

Green Giant Arborvitae is relatively easy to grow but requires proper planting and maintenance to thrive.

Here’s a step-by-step guide on how to grow Green Giant Arborvitae.

Step #1: Choose the Right Location

Follow these guidelines for choosing the perfect location:

  • Choose a location that receives full sun to partial shade.
  • Make sure the soil is well-draining and nutrient-rich.
  • Avoid areas with standing water or poorly-draining soil.

Step #2: Plant the Trees

Follow these steps for proper planting:

  1. Dig a hole twice the size of the tree’s root ball.
  2. Place the tree in the hole.
  3. Backfill the hole with soil, ensuring it is straight and level.
  4. Water the tree thoroughly after planting.

Step #3: Water and Fertilize

Follow these guidelines about watering and fertilizing your Green Giant Arborvitae trees:

  • Water the tree regularly, especially during the first year after planting.
  • Use a slow-release fertilizer in the spring to promote healthy growth.

Step #4: Prune the Trees

Follow these guidelines to prune your Green Giant Arborvitae trees properly:

  • Prune the trees in late winter or early spring before new growth begins.
  • Remove any dead or damaged branches.
  • Trim the tips of the branches to promote bushier growth.

Step #5: Maintain the Trees

Follow these maintenance tips:

  • Keep the area around the tree free of weeds and debris.
  • Watch out for common pests and diseases affecting arborvitaes, such as spider mites, bagworms, and cankers.
  • Consider using a tree wrap during winter to protect the tree from sunscald and windburn.

How To Care for Green Giant Arborvitae?

Thuja Green Giant
Source: Wikimedia

Green Giant Arborvitae is relatively easy to care for. With regular maintenance, you can keep your tree attractive and healthy.

Here are some tips on caring for Green Giant Arborvitae.


Green Giant Arborvitae requires moisture for healthy growth.

Here’s how to water your trees properly:

  • Deep watering is essential for Green Giant Arborvitae trees. You should water them deeply once a week, especially during hot, dry weather. This will ensure that the roots get enough moisture to thrive.
  • The moisture level must be regularly checked. You should ensure that the soil is moist but not soggy. Overwatering can lead to root rot, which can be fatal to the tree.
  • Avoid overhead watering, which can lead to fungal diseases and pest infestations. Instead, water the trees with a soaker hose or drip irrigation system.


Fertilize your Green Giant Arborvitae trees to give them the nutrients necessary to grow strong and healthy.

Here’s how to fertilize your trees:

  • Timing is vital: Fertilize your trees in the spring, just before the new growth begins. This will ensure the nutrients are available when the tree needs them the most.
  • Use a slow-release fertilizer: Slow-release fertilizers are best for arborvitae trees. They provide a steady supply of nutrients over an extended period, which is more beneficial than a quick burst of nutrients.
  • Don’t over-fertilize: Over-fertilizing can lead to excessive growth, making the tree more susceptible to pests and diseases. Stick to the recommended dosage on the fertilizer package.


Green Giant Arborvitae trees need to be pruned to shape. Prune your trees in late winter or early spring before the new growth begins.

This will allow you to see the tree’s shape and remove dead or damaged branches.

Here’s how to prune your trees:

  • Trim the tips: To promote bushier growth, trim the tips of the branches. This will encourage the tree to produce new growth from the branch’s base.
  • Remove dead or damaged branches: Dead or damaged branches can be a breeding ground for pests and diseases. Remove them promptly to prevent further damage to the tree.

Possible Problems

Green Giant Arborvitae trees are relatively pest and disease-resistant but can still be affected by common problems.

Here’s how to prevent and treat common issues:

  • Spider mites: Spider mites are common pests affecting arborvitae trees. They can be treated with insecticidal soap or neem oil.
  • Bagworms: Bagworms can cause significant damage to arborvitae trees. They can be controlled by removing the bags by hand or using an insecticide.
  • Cankers: Cankers are fungal infections that can cause the tree’s bark to peel and crack. They can be prevented by keeping the tree healthy and avoiding mechanical damage to the bark.

Winter Protection

Green Giant Arborvitae trees are hardy and can withstand cold temperatures but still require winter protection.

Here’s how to protect your trees in winter:

  • Avoid pruning in the fall. Pruning can stimulate new growth, which can be damaged by cold temperatures.
  • Mulch around the base of the tree. Mulching will help to insulate the roots and retain moisture in the soil.
  • Use a tree wrap. A tree wrap will protect the bark from sunscald and windburn, which can be common problems during winter.


Green Giant Arborvitae is a perfect addition to any garden, providing privacy, beauty, and versatility.

It can grow into a majestic centerpiece or a functional screen for any outdoor space with proper care.

So go ahead, get your hands dirty, and try it!

With these tips and tricks, you’ll be on your way to creating a stunning garden.

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