Plant thuja with an intact rootball, the first main roots at the correct level and a surrounding soil that can release excess water. Choose spacing from the cultivar and its expected mature width. After planting, concentrate on suitable rootball moisture and check that the plant has not settled too deeply.
Start with the site before buying plants. A container-grown thuja may look compact today, but cultivar and conditions determine its later size. A photograph of a dense green screen does not explain whether your plants will have room beside a fence, path or neighbouring trees.
A specimen or a future hedge
Allow a specimen room to develop its selected form. For a hedge, also plan access to both sides, watering and later maintenance. Do not calculate plant numbers from fence length alone. First establish the cultivar, expected width and the shape you intend to maintain.
Mark the proposed positions and view them from paths and windows. Check whether mature foliage could obstruct a passage or gate. Clarify incomplete label information before ordering. One spacing for every thuja ignores the difference between a narrow columnar cultivar and a broadly spreading form.
A sunny position with moisture and adequate drainage suits many popular western thuja cultivars, but check the particular plant's requirements. Protection from drying winds matters especially for young plants. Beside a wall or solid fence, assess shade and whether rainfall actually reaches the soil beneath the foliage.
When conditions are suitable
Use soil condition and weather, rather than a month alone, to decide when to plant. Soil should be workable, neither frozen nor saturated, and not so dry that maintaining the rootball becomes impractical. A container does not remove the effects of heat, cold wind or insufficient water after planting.
A dry southern Ukrainian site, an exposed windy plot and a wetter western garden need different decisions. In spring, check that soil has thawed and is not waterlogged. For autumn planting, consider approaching sustained cold and whether aftercare remains possible. This guide does not imply that any November weather is suitable for planting.
If the plant has arrived but the site is temporarily unsuitable, protect the rootball from drying and ask the supplier about temporary holding conditions. Leave it in its container until preparation is complete. A convenient delivery date should not force planting into a flooded or frozen hole.
Inspect the plant before starting
- Find the cultivar name and mature-size information to confirm the layout.
- Examine foliage, the stem base and rootball. Significant damage needs an explanation before planting.
- Check moisture inside the rootball and ensure the container's drainage openings are clear.
- Inspect accessible roots carefully. Tight circles against the container wall need attention, rather than concealment under soil.
- Locate the first main roots. The top of the potting mix is not always a reliable planting-depth reference.
Carry the plant by its container or with the rootball supported, rather than lifting it by the stem. Arrange help and a clear route for a heavy specimen. If roots are badly circling or the ball is falling apart, ask someone qualified to assess it instead of following an arbitrary root-cutting recipe.
Prepare a site that does not trap water
Inspect the area after rain and establish where water goes. A persistently wet hollow is not corrected by digging a deeper individual planting hole. Resolve drainage or choose another position first. Begin with the guide to assessing soil before fertilizing.
The prepared area should be wide enough to work around the rootball and surrounding soil. Determine depth from the actual position of the first main roots and keep a firm base beneath the ball. Excessively loosened material underneath can settle with the plant. Do not bury thuja more deeply simply to hold it upright.
Avoid making an isolated bowl of very loose, nutrient-rich mix inside dense soil. Use suitable existing soil for backfilling and assess the whole planting area. Fertilizer at the bottom does not replace drainage. Decorative mulch should likewise never conceal an incorrectly buried stem base.
The planting sequence
- Moisten the rootball when necessary and prepare the site before removing the container.
- Remove the container carefully while supporting the roots and soil. Do not leave it underground.
- Set the plant on a firm base, checking root level and alignment from several directions.
- For a balled plant, remove ties and materials that could constrict the stem or obstruct roots, using a sequence that preserves the ball.
- Backfill gradually and water to establish contact with the rootball. Avoid stamping soil into a compact mass.
- Check the level again after settling. Keep the stem base exposed and mulch away from the bark.
Support is needed for actual instability, rather than automatically for every thuja. At a windy site, choose support that holds the ball without constricting the stem. Inspect ties during later checks. Do not remove healthy green foliage merely to compensate for the fact that the plant has been transplanted.
Watering after planting
| What you observe | Practical response |
|---|---|
| Dry rootball with moist surrounding soil | Check wetting of the ball itself, rather than only the surrounding surface. |
| Persistently wet ball and surrounding soil | Investigate drainage instead of watering to a timetable. |
| The plant settles after watering | Reassess planting level and support beneath it; do not pile soil against the stem. |
| Foliage changes colour | Inspect moisture, planting depth and damage before selecting a product. |
Check both the original ball and the soil beside it because they can dry differently. Adjust watering to weather and root conditions. One bucket count is unsuitable for both a small container plant and a large balled specimen. If colour changes appear, use the guide to finding the cause of yellow thuja foliage.
When conifer feeding is appropriate
Find out whether the nursery already supplied fertilizer. Feeding is not an automatic response to transplanting: assess soil and previous inputs first. A conifer compound is available for spring surface application under its instructions. Do not automatically move that spring operation into an autumn planting programme.
Conifer compound: application directions
Complex fertilizer for coniferous evergreens, granules
This product is intended for evergreen conifers. Assess its need separately from rootball handling and drainage. The directions distinguish spring planting from later growing-season applications.
When planting plants
As the main fertilizer, it is used in the spring when planting and feeding plants. The granules are spread over moist soil. The application rate is calculated depending on the maturity and size of the plants: for young plants - 50-60 g/plant, and for mature 60-200 g/plant.
During the growing season
It is applied superficially on wet soil with subsequent loosening. Fertilization is carried out 1-2 times during the growing season, depending on soil fertility and agro-climatic conditions. With surface application of 50-200 g/plant, or for every 10 cm of conifer height, 5 g of fertilizer evenly around the stem circle.
Pack sizes: 1 kg, 3 kg and 4 kg. Select the required option on the product page.
The alternative calculations are not separate portions to add together. Choose the appropriate method from plant size and the complete directions. Do not place these granules underneath the rootball or try to correct waterlogging or excessive planting depth with fertilizer.
Planning the purchase
Confirm cultivar, plant size, root system type and handling requirements before ordering. Count plants after marking the site. In My Garden, define the zone, crop and measurements for a fertilizer plan; keep watering dates in your own notebook. Further guides are in Conifers and shrubs.
Questions about planting thuja
Use the first main roots as the reference, rather than the surface of the potting mix. Excess soil may already cover those roots in the container. Deeper planting is not a method of securing the plant.
Spacing depends on cultivar, expected width and intended form. Establish those details and maintenance access first, then determine plant numbers for the row length. Do not treat present container width as the mature crown width.
Do not use the selected compound that way: its instructions describe surface application. Planting alone does not establish a nutrient shortage, especially where the growing mix already contains fertilizer.
Rain can wet the surrounding surface unevenly. Assess the original ball and neighbouring soil so that watering reflects the roots' actual condition rather than the appearance of a wet path.
