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Thuja Green Giant Growth Rate: Understand & How To Promote

Thuja Green Giant trees are potential replacements for Christmas trees as both look similar, but the first one is low maintenance with a high growth rate. 

Generally, Thuja Green Giant extends to a height of 15 meters with a spread of 3.5 to 6 meters within 6 to 10 years of planting. 

Follow along to learn in detail about these varieties of Thuja plants. 

How Big Thuja Green Giant Can Get?

Thuja Giant Green Giant belongs to the cypress family, Cupressaceaean, with distinct dark green small scaly levels. 

This pyramidal evergreen tree is not a regular Arborvitae but a hybrid of Thuja standishii and Thuja plicata

With the best characteristics from both parents, Thuja Giant Green can reach an impressive height exceeding 50 feet (15 meters) with a spread of around 12-20 feet (3.5-6 meters).
A growing Thuja Green Giant in middle of a field.
The plant can be uprooted and replanted in a favorable location during early growth.

Moreover, these trees are apt for when you have quite a modest spot in your garden to cover.

People also use them as a privacy screen or a windbreak due to their ability to provide year-round coverage.

All About Thuja Green Giant Growth Rate

Green Giant Arborvitaes are popular as fast growers which bear no flowers. 

On average, the plant grows at least 2-3 feet per year, even with little to no care. Simultaneously, the branches extend with small glossy leaves arranged in a row of four, resembling a fan. 

When the plants mature, which takes roughly 6-10 years, they attain full height if left unpruned. 

However, plant growth is associated with the local climate it is grown in. 

Further, the tree bark darkens from a slightly bronze color and gets more woody. 

Disclaimer: Arborvitaes Green Giant is not listed on the ASPCA toxic plant list, but excessive consumption of this green can cause oral irritation and stomach discomfort. Try keeping these plants at a distance from your pets.

How To Make Thuja Green Giant Grow Fast?

Thuja Green Giant is among the low-maintenance conifer. Thus, you might not have had time to grow them.

This variety of Thuja is drought-hardy, resistant to pest and disease invasion, and can withstand harsh climatic conditions.

So, the best you can do is fulfill the primary care, and this rapidly growing plant will keep up its pace.

  • These plants are highly adaptive to a wide range of soil, but choosing a location with slightly acidic soil with a pH range of 6-6.5 help the plant grow better. 
  • Provide at least 5 to 6 hours of full sunlight to help maintain the lush leaves responsible for photosynthesis.
  • Water the plant every two to three days, especially during the first year of growth. Second year onwards, deep water the plant with an inch per week.
  • As the plant adores moist soil, apply a plastic mulch or organic layer to retain moisture and protect the roots against temperature fluctuation. 
  • Green Giant should be OK from USDA zone 5 to 9. For the lower hardiness zone, use winter protection like burlap to help your plant maintain its health and vigor and prevent leaf browning.
  • You may add some balanced fertilizer after the final frost of the season to boost the plant’s overall growth. (not mandatory) 

From Editorial Team 

Prune for Large Canopy!

Thuja Green Giant doesn’t necessarily require pruning. But you may cut back a third of the tree’s central trunk to promote broader growth of the tree.

By regular pruning, these plants can be used as a hedge along the pathway. 

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