How to Care for Thuja Green


Thuja Green Giant is a fast-growing evergreen hybrid that will grow from 60 to 70 feet tall and 10 to 20 feet wide. The tree can grow as much as 3 feet per year and is commonly used as wind break, screen or tall hedge row. Thuja Green Giants require minimum care and are hardy in USDA planting zones 4b through 8. This tree will keep its dense texture and dark green color throughout the winter, giving you landscape color throughout the year. Green Giants are also deer resistant.

Step 1

Find a planting location that receives full sun to partial shade. The tree will grow very tall, so don't plant it near power lines or too close to a building. The area may be damp, but not soggy.

Step 2

Dig a hole three times the diameter of the root ball. Clean out all weeds, lawn grass and stones from the soil. Amend the dug-out soil with one part compost to three parts soil if the area does not drain well.

Step 3

Carefully remove the tree from the container or burlap and gently spread out the roots. Place it in the planting hole and fill the hole halfway with soil. Water to compact the soil around the roots and continue to fill until the soil is level with the surrounding ground, while making sure the tree is sitting in the hole straight.

Step 4

Water the tree to keep the soil moist throughout the first two growing seasons. These trees prefer moist soil and humidity. From the third year on, water only when the weather is exceptionally hot and dry.

Step 5

Apply a time-released, granular, evergreen fertilizer to the soil around the tree each spring. Follow the manufacturer's directions for the appropriate amount to apply.

Step 6

Place a 3-inch layer of organic mulch around the tree once you start to see some growth. Keep the mulch 6 inches from the trunk. Reapply mulch whenever needed.

Things You'll Need

  • Shovel
  • Compost
  • Evergreen fertilizer
  • Organic mulch


  • North Carolina State University: Thuja 'Green Giant'
  • University of Connecticut: Thuja Plicata
  • Clemson University: Trees of Strength for South Carolina Landscapes

Who Can Help

  • Fast Growing Trees: Thuja Green Giant Planting Instructions
Keywords: planting Thuja trees, Thuja Green Giant, growing tall trees

About this Author

Dale DeVries is a retired realtor with 30 years of experience in almost every facet of the business. DeVries started writing in 1990 when she wrote advertising and training manuals for her real estate agents. Since retiring, she has spent the last two years writing well over a thousand articles online for Associated Content, Bright Hub and Demand Studios.