When To Plant Green Giant Arborvitae

The best time to plant green giant arborvitae is in the early fall or early spring, as these seasons offer the ideal balance of cool air and warm soil for root establishment.
 
If you are wondering when to plant green giant arborvitae to give them the strongest start, fall is often the top choice because the soil stays warm enough for roots to grow while the cooler air reduces stress on the foliage.
 
Spring planting is also a fantastic option, especially in northern climates where winters arrive fast and you want your trees fully settled before the ground freezes.
 
In this post, we’ll dig into why timing matters so much when you plant green giant arborvitae, the best months for different regions, and how to get your planting done right.
 
Let’s get those evergreens in the ground at the perfect moment.
 

When to Plant Green Giant Arborvitae for Best Results

So, when to plant green giant arborvitae?
 
The short answer is that you should plant green giant arborvitae during the dormant or semi-dormant periods of the year, which are early spring (March to May) and early fall (September to October).
 
These windows avoid the extreme heat of summer, which can shock newly planted roots, and the deep freeze of winter, which prevents any root growth at all.
 
Let’s break down the best timing for your specific climate so your green giant arborvitae thrive.
 

1. Early Fall Planting (September to October)

If you’re asking when to plant green giant arborvitae for maximum root development, early fall is your winner.
 
During September and October, the soil is still warm from summer, which encourages roots to spread out and anchor themselves before winter.
 
The air temperatures are cooler, so the evergreen foliage won’t lose as much moisture through transpiration, reducing transplant shock.
 
When you plant green giant arborvitae in the fall, you give them about 6 to 8 weeks to establish roots before the ground freezes in most regions.
 
This head start means your trees will be ready to push out new growth immediately in the spring, rather than spending energy just surviving.
 

2. Early Spring Planting (March to May)

Early spring is another excellent answer to the question of when to plant green giant arborvitae, especially for gardeners in colder zones.
 
As soon as the soil thaws and you can work it without it being muddy, you can plant green giant arborvitae.
 
Spring planting gives the trees a full growing season to establish their root systems before the next winter arrives.
 
The key is to plant before new growth begins, or just as it’s starting, so the tree can focus its energy on rooting rather than leafing out.
 
In warmer climates, like zones 7 and 8, you can even plant green giant arborvitae in late winter, around February, if the ground isn’t frozen.
 

3. Avoid Summer and Deep Winter Planting

Now that you know when to plant green giant arborvitae, it’s equally important to know when not to plant them.
 
Summer’s intense heat is brutal on new transplants because the roots can’t draw up water fast enough to replace what the foliage loses.
 
While you can plant in summer if you water religiously, it’s risky and often leads to stunted growth or dieback.
 
Deep winter, when the ground is frozen solid, makes it impossible to dig a proper hole, and the roots will simply sit in cold shock without growing.
 
So stick with the shoulder seasons for the safest and most successful planting of green giant arborvitae.
 

Regional Timing Tips for Planting Green Giant Arborvitae

Knowing when to plant green giant arborvitae also depends heavily on where you live, so let’s break it down by region.
 

Northern Climates (Zones 2 to 5)

In cold northern areas, spring is often the safer bet for when to plant green giant arborvitae.
 
Fall planting can be tricky because winter may arrive earlier than expected, leaving the roots with no time to establish.
 
Aim for late April to mid-May, as soon as the soil is workable, to give your trees the longest possible window before the snow flies.
 

Mild and Southern Climates (Zones 6 to 8)

Gardeners in milder zones have more flexibility on when to plant green giant arborvitae.
 
Both early fall and early spring work beautifully here, but fall is particularly lovely because the mild winters allow roots to grow slowly all season long.
 
You can even plant green giant arborvitae in November in these zones, as long as the ground isn’t frozen.
 

How to Plant Green Giant Arborvitae Step by Step

Once you’ve decided when to plant green giant arborvitae, proper planting technique is what ensures success.
 
Here’s a quick guide to get your trees off to a great start.
 

1. Choose the Right Location

Green giant arborvitae need full sun to partial shade, meaning at least 6 hours of direct sunlight daily.
 
They prefer well-draining soil, so avoid low spots where water puddles after rain.
 
Space your trees 6 to 8 feet apart if you want a dense privacy screen, or 10 to 12 feet apart for individual specimens.
 

2. Dig a Wide, Shallow Hole

The hole should be just as deep as the root ball but two to three times wider.
 
Wider holes allow roots to spread out easily into the surrounding soil, which is crucial for establishment.
 
Loosen the soil around the edges of the hole with a garden fork to help roots penetrate.
 

3. Water Deeply and Mulch

After planting, water thoroughly to settle the soil around the roots and eliminate air pockets.
 
Apply a 2 to 3 inch layer of mulch around the base, but keep it a few inches away from the trunk to prevent rot.
 
For the first year, water deeply once a week, especially during dry spells, to keep the roots moist but not soggy.
 

So, When to Plant Green Giant Arborvitae?

The best time to plant green giant arborvitae is in early fall or early spring, depending on your local climate.
 
Fall gives roots a warm-soil head start, while spring offers a full season of growth before the next winter.
 
If you plant green giant arborvitae during these moderate windows, you’ll give them the best chance to establish strong, deep root systems.
 
Avoid summer heat and frozen winter ground, and your trees will reward you with fast, lush growth.
 
Now that you know when to plant green giant arborvitae, grab your shovel and get those evergreens in the ground.
 
Your future privacy screen will thank you.