Grow Success with Thuja Gardens: Expert Tips for Planting and Maintaining Your Thuja Green Giant

Adam D
5 min readJun 24, 2024

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As home gardening continues to grow in popularity, many enthusiasts are looking for hardy, beautiful plants to enhance their landscapes. Among the favorites is the Thuja Green Giant, known for its fast growth and lush, evergreen foliage. This article offers valuable tips on planting and maintaining your Thuja Green Giant, ensuring your garden thrives. Whether you’re a seasoned gardener or a newcomer, these insights will help you cultivate a stunning and resilient garden.

Introduction to Thuja Green Giant:

The Thuja Green Giant is a hybrid arborvitae celebrated for its rapid growth and robust nature. It can grow up to 3–5 feet per year, reaching heights of 30–40 feet, making it an excellent choice for privacy screens or windbreaks. According to the U.S. National Arboretum, the Thuja Green Giant is one of the most popular choices for large-scale landscaping due to its disease resistance and low maintenance requirements. Its lush, dense foliage provides year-round greenery and privacy, making it a top choice for many gardeners.

Choosing the Right Thuja Variety:

When selecting plants for your garden, consider the variety of arborvitae that best suit your needs. The Thuja Green Giant is ideal for those looking for a fast-growing, tall hedge. However, if you need something more compact, the Thuja Can Can might be a better option. The Thuja Can Can reaches only about 8–10 feet in height but offers dense foliage and a tidy, conical shape, making it perfect for smaller gardens or accent plantings. For those interested in adding a striking focal point, the American Pillar Arborvitae is a slender, columnar variety that can fit into tighter spaces while still providing excellent coverage.

Ideal Planting Conditions:

For optimal growth, plant your Thuja Green Giant in well-drained soil with a slightly acidic to neutral pH. These plants thrive in full sun to partial shade, requiring at least 6 hours of sunlight daily. Spacing is crucial; plant them 5–6 feet apart to allow enough room for growth and air circulation, which helps prevent disease. Proper site selection and preparation can significantly impact the health and growth rate of your Thujas.

Planting Steps:

Prepare the Soil: Dig a hole twice as wide and just as deep as the root ball of the Thuja Green Giant. Enrich the soil with compost to enhance drainage and nutrient content. Well-prepared soil is key to helping your new plants establish quickly and thrive.

Planting: Place the root ball in the hole, ensuring the top is level with or slightly above the ground. Backfill with the enriched soil, pressing down to eliminate air pockets. Ensuring good soil contact with the roots is crucial for stability and nutrient uptake.

Watering: Water thoroughly after planting to settle the soil. Continue to water regularly, especially during the first year, to establish a strong root system. Consistent moisture is essential for young plants to develop deep, healthy roots.

Maintenance Tips:

Maintaining your Thuja Green Giant involves regular watering, mulching, and occasional pruning.

Watering: Keep the soil consistently moist but not waterlogged. During dry periods, ensure the plants receive deep watering at least once a week. In the first year, deep watering encourages deep root growth, which helps the plant withstand drought in later years.

Mulching: Apply a 2–3 inch layer of mulch around the base to retain moisture, suppress weeds, and regulate soil temperature. Mulch also helps to improve soil structure and fertility over time as it decomposes.

Pruning: Minimal pruning is needed, but occasional trimming helps maintain the desired shape and promotes dense growth. The best time to prune is late spring or early summer. Avoid heavy pruning in late summer or fall, as this can stimulate new growth that may not harden off before winter.

Addressing Common Issues:

While the Thuja Green Giant is resistant to most pests and diseases, it’s essential to watch for potential issues such as spider mites or bagworms. Regular inspections and early intervention can prevent significant damage.

Spider Mites: These tiny pests can cause bronzing of the foliage. Spray a strong jet of water to dislodge them, or use an appropriate miticide. Early detection and treatment are key to preventing serious infestations.

Bagworms: These insects create bag-like cocoons and can defoliate the plant. Remove and destroy the bags manually or use insecticidal treatments if infestations are severe. Regular monitoring and prompt action can save your plants from extensive damage.

Winter Burn: In colder climates, winter burn can be an issue where the foliage turns brown due to cold, dry winds. Protect your plants by wrapping them in burlap or using anti-desiccant sprays in late fall. Ensuring your plants are well-watered before the ground freezes also helps reduce the risk of winter burn.

Planting and maintaining Thuja Green Giant is a rewarding experience, providing your garden with beauty and privacy for years to come. With the right care, these resilient trees will flourish, enhancing your landscape.

If you’re ready to transform your garden, Thuja Gardens is here to help. As experienced plant growers, they offer a variety of high-quality plants, including Thuja Green Giant, American Pillar Arborvitae, Japanese Stewartia, and Thuja Can Can, shipped directly to your door.

Visit Thuja Gardens today to explore their selection and get started on your gardening journey.

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