Thuja is one of the most popular ornamental plants in our gardens. Thanks to its dense, green structure, it makes an excellent hedge, windbreak, and aesthetic landscaping element. How should you properly plant and care for thuja so that it maintains its beautiful appearance for many years? In this article, you’ll find practical tips on planting, care, and fertilization of thuja.
How to Plant Thuja? Key Guidelines
1. Choosing the Right Location
Thuja thrives best in sunny or partially shaded locations. Avoid waterlogged areas, as excess moisture can cause root rot. The ideal soil should be:
- well-drained,
- slightly acidic to neutral (pH 5.5–6.5),
- rich in humus and moderately moist.
2. When to Plant Thuja?
The best time to plant thuja is early spring (March–April) or autumn (September–October). Avoid planting in summer, as young plants may struggle with high temperatures and lack of moisture.
3. How to Properly Plant Thuja?
- Dig a hole twice as wide as the plant’s root ball.
- Place a layer of drainage (e.g., gravel) at the bottom if the soil is too compact.
- Mix the soil with compost or conifer fertilizer.
- Place the thuja in the hole at the same depth as it was in the pot.
- Cover the roots with soil and gently compact it around the plant.
- Water generously.
- Mulch the soil around the plant with pine bark to reduce evaporation and prevent weeds.
4. How Densely to Plant Thuja for a Hedge?
- ‘Smaragd’ Thuja – 50–70 cm apart
- ‘Brabant’ Thuja – 60–80 cm apart
- Columnar Thuja – 40–60 cm apart
- Spherical Thuja – 80–100 cm apart, depending on the variety
How to Care for Thuja? Essential Rules
1. Watering
Thuja requires regular watering, especially in the first year after planting. It is recommended to:
- water 2–3 times a week during dry periods,
- water once every 2 weeks in winter (if there is no precipitation),
- avoid excessive wetting of the leaves to prevent fungal diseases.
2. Fertilizing Thuja
To ensure healthy growth and a vibrant green color, use fertilizers designed for conifers:
- Spring (March–April) – nitrogen-rich fertilizers,
- Summer (June–July) – multi-nutrient fertilizers,
- Autumn (September–October) – potassium and phosphorus fertilizers to strengthen the plants before winter.
3. Pruning and Shaping Thuja
Thuja can be pruned to maintain its shape and encourage denser growth:
- The first trim should be done in April.
- Additional pruning can be done until August.
- Avoid pruning in autumn to prevent frost damage to young shoots.
4. Protection Against Diseases and Pests
Thuja can be susceptible to fungal diseases and pests such as spider mites or scale insects. Symptoms of diseases include:
- yellowing and browning of needles,
- spots on branches,
- dried-out branch tips.
To prevent issues:
- use fungicidal sprays if disease symptoms appear,
- regularly check for pests,
- remove diseased or dried-out branches.
Thuja is a great choice for the garden, but it requires proper care. The key rules are:
- Planting in the right location and spacing.
- Regular watering, especially in the first year.
- Fertilizing according to the season.
- Pruning in spring and summer for better density.
- Protecting against diseases and pests.
By following these tips, your thuja will remain healthy, dense, and green all year round! 🌿
You can also arrange a conversation with our plant care advisor Alicja, contact us!
