Thuja, commonly known as arborvitae, is a resilient and attractive option that suits the UK climate well. In this guide, I'll walk you through the practical steps to successfully plant and nurture a Thuja hedge in your garden.
Quick Answer
To grow a Thuja hedge, plant young trees 60-80 cm apart in well-drained soil during autumn or spring. Water regularly and trim once or twice yearly.
Choosing the Right Thuja Variety
When selecting a Thuja variety, consider the space available and the hedge's purpose. Thuja occidentalis and Thuja plicata are popular choices in the UK. Both varieties offer dense foliage and fast growth, ideal for privacy hedges. The key is to match the plant's growth habit with your specific needs.
Preparing the Site
Before planting, it's crucial to prepare the site properly. Choose a location with full sun to partial shade and well-drained soil. In Staffordshire, where clay soils are common, you may need to improve drainage by adding organic matter or grit.
Planting Your Thuja Hedge
Planting is best done in autumn or spring. Dig holes twice the width of the root ball and as deep as the container. Space each plant 60-80 cm apart to ensure they have room to grow.
| Month | Activity | Notes |
|---|---|---|
| March-April | Planting | Ideal planting time |
| May-August | Watering | Ensure consistent moisture |
| September | Trimming | First trim of the year |
| October | Planting | Second planting window |
Caring for Your Thuja Hedge
Regular care is essential for a healthy hedge. Water newly planted Thujas regularly, especially during dry spells. Once established, they'll be more drought-tolerant, but consistent watering is vital in the first couple of years.
Trimming and Pruning
Trim your Thuja hedge once or twice yearly. The first trim should be in late summer to maintain shape, with a light trim in spring if needed. Avoid cutting into old wood, as Thujas do not regrow from old wood.
- Water regularly during the first two years
- Trim in late summer for best shape
- Avoid heavy pruning in old wood
- Feed with a general-purpose fertiliser in spring
Pest and Disease Management
Thuja hedges are generally resilient, but watch for signs of pests like aphids or diseases such as root rot. Regular inspections can catch issues early, allowing for prompt treatment with appropriate measures.
Frequently Asked Questions
How tall will my Thuja hedge grow?
Thuja hedges can grow up to 3-4 metres tall, depending on the variety and growing conditions.
Can I grow a Thuja hedge in a pot?
While possible, growing Thujas in pots isn't ideal for a full hedge. They prefer room to spread their roots in the ground.
When is the best time to fertilise my Thuja hedge?
Fertilise your hedge in early spring with a balanced, slow-release fertiliser to support healthy growth throughout the season.