Plant Profile: Cryptomeria japonica 'Elegans Nana'

The 'Elegans Nana' variety of Cryptomeria japonica is part of the Cypress family, which has been reclassified to include the Cupressaceae family. This cultivar is a slow-growing evergreen shrub characterized by its dense, rounded, and flat-topped shape, along with short, finely textured leaves. The foliage is green in the summer, shifts to a bronze hue in winter, and reverts to green in spring. Young leaves are soft, feathery, and exhibit a blue-green color, while mature leaves become stiffer and more prickly. It thrives in full sunlight but appreciates some light shade in the afternoon. To protect it from harsh winter winds, some shelter is advisable. The plant prefers acidic, well-drained, and fertile soil, although it can endure periods of drought. It can also tolerate compacted urban soils if irrigation is available. This cultivar serves as an intriguing specimen for smaller spaces and requires minimal pruning to maintain its shape. While it may produce small, inconspicuous cones in the fall, they do not create a litter problem. Other varieties of Japanese Cedar can differ significantly in size and shape, including larger tree forms.

It's important to note that this plant can be mistaken for other non-dwarf varieties of Cryptomeria japonica. For instance, Cryptomeria japonica 'Elegans' is not a dwarf and features a much taller, pyramidal structure.

In Hawaii, Japanese cedar is recognized as an invasive species within Haleakala National Park.

Regarding pests and diseases, this plant is generally low-maintenance but may face issues with mites, fungi, dieback, leaf spot, and leaf blight. Leaf blight can lead to browning foliage, but this can be mitigated by ensuring good air circulation around the plants and keeping the leaves dry.

For further details on Cryptomeria japonica, additional resources are available.