Description
Thuja occidentalis 'Mirjam' shrub 20-25 cm C3 | Western arborvitae
The Mirjam globe arborvitae shrub is a compact, rounded form of Western arborvitae (Thuja occidentalis ‘Mirjam’). Its neat, ball-like outline gives this particular shrub a clear shape in the garden, while its evergreen foliage keeps that shape present throughout the year. The foliage is described as golden yellow to yellow-green, bringing a light, warm tone to the planting. This is a shrub form of the ‘Mirjam’ cultivar, rather than a standard or hedge plant. Its slow growth means that changes in its size are gradual, so the rounded outline remains a key part of its appeal as it develops. The stated average mature height is 80, but no unit is confirmed, so it is not possible to give a reliable height measurement here. No mature width is specified. The foliage colour and evergreen character make this compact conifer a useful choice where you want a defined form and colour that remain part of the garden outside the flowering season. Flowering details are not provided, so the main points to consider are its foliage, shape and growth habit. To explore related plants, see Thuja.
Key features of Western arborvitae (Thuja occidentalis 'Mirjam') as a shrub
- This shrub has a compact, rounded habit, with a low, ball-like silhouette that distinguishes this form of ‘Mirjam’. Its slow growth means it develops gradually. No width is specified, so allow for its rounded outline without relying on an exact spread.
- The foliage is evergreen and ranges from golden yellow to yellow-green. This colour remains a feature through the year, rather than being limited to a flowering period. Specific details about leaf shape, flowers or flowering months are not available.
- Choose a position in full sun or partial shade. In a UK garden, either can provide a suitable setting for this conifer. The outline does not specify wind tolerance, so no claim about exposed positions can be made.
- It suits humus-rich soil that stays slightly moist but drains well. Good drainage is important, while prolonged dry conditions are not tolerated. These features make it worth checking that the chosen position is not persistently dry or poorly drained.
- Its evergreen foliage and compact form place it among evergreen shrubs to consider for a border or container. The rounded shape gives it a distinct outline among other planting, while its slow growth means it does not change quickly. No flowering or wildlife value is stated.
Uses of the Mirjam globe arborvitae shrub in the garden
- Use this compact, rounded shrub as a specimen where its ball-like outline can be seen clearly. Its distinct shape gives the planting a defined point of interest. The golden-yellow to yellow-green foliage adds colour to the view throughout the year.
- It is also listed for a rock garden or border. In these settings, its evergreen foliage and rounded habit offer a clear contrast with plants of other shapes or colours. No specific companion plants are given, so choose combinations according to the conditions and effect you want.
- The shrub form is suitable for a pot, as well as for planting in the garden. Its compact outline gives the container planting a defined shape, while its foliage colour provides year-round interest. No particular pot size or mature spread is specified.
- The stated hardiness range is approximately -34°C to -29°C, with a rating of USDA zone 4. This is the hardiness information supplied for the plant; it does not mean the shrub tolerates prolonged dry conditions. For UK gardens, the stated preference for slightly moist, well-drained soil remains relevant.
- Its main ornamental features are the evergreen, golden-yellow to yellow-green foliage and the compact, rounded silhouette of this particular shrub form. Slow growth supports its measured development as an accent, without implying a fixed final width or suitability for a particular garden size.
For a specimen, rock garden, border or pot, the Mirjam globe arborvitae offers an evergreen, rounded shrub form with golden-yellow to yellow-green foliage.
