Cryptomeria japonica 'Radicans' / radicans Japanese cedar

Cryptomeria japonica 'Radicans' is a robust, fast-growing selection of Japanese cedar with columnar to pyramidal growth habit. It has dense, blue-green, feathery foliage that retains its color in winter with less bronzing than other Japanese cedars. ‘Radicans’ grows 30 to 40 feet (10-12 m) tall (sometimes up to 50 feet/15m) and 15 to 20 feet (5 - 6 m) wide. It is less prone to tip blight and leaf spot than other members of the species.

This cultivar originated in 1941 as a plant selected for the forestry industry in Japan. In 1941, Takenoshin Nakai (1882–1952) made a formal botanical study on the plant, hoping to be able to classify it as a specific variety of the species (Cryptomeria japonica var. radicans). Apparently peer revue determined that there was not enough distinction from the type to warrant such classification, rendering the results of the study synonymous with the typical species. "radicans" translates in "rooting" in the Latin language.

Cryptomeria japonica 'Radicans' — an attractive planting at a tree farm in South Carolina.
Photo by Fast Growing Tree, inc.



How deer resistant is the tree, is it partial shade tolerant and what is the approximate rate of grow per year?

David Olszyk

Deer-resistance completely depends on the deer in your area. In my world (WA-state), deer never touch cryptos ... in the Northeast where there are more deer than food for them to eat, everything is fair game. Young plants are particularly susceptible to buck-rubbing, because the trees are straight and narrow when young.

This cultivar is tolerant of light shade, but might grow a little slower if not in full sun.

'Radicans' is selected in Japan for use in forestry. This implies really fast growth. I would not be surprised to see this one grow 2-3 feet per year.