Cryptomeria

Cryptomeria, also called Japanese cedar, is a fast-growing conifer that adds 2 to 3 feet per year in favorable conditions, quickly forming an elegant pyramidal screen or specimen. Choose a site with full sun to partial shade and moist, acidic, well-drained soil with a pH of 5.0 to 6.5. Protection from harsh winter winds is essential, as desiccating winds cause unsightly foliage browning. Space trees 8 to 15 feet apart for screening or allow 20 feet or more for specimen planting.

Plant balled-and-burlapped or container-grown trees in early spring or fall. Dig the hole 2 to 3 times wider than the root ball and set at the same depth as the nursery. Water deeply at planting and mulch with 3 to 4 inches of acidic organic matter such as pine bark or composted leaves. Maintain consistent moisture throughout the first two growing seasons with weekly deep watering.

Cryptomeria requires minimal pruning; its natural form is symmetrical and attractive. If needed, prune in late spring after new growth emerges. Avoid cutting back into bare wood, as cryptomeria does not regenerate well from old wood. The reddish-brown bark peels in vertical strips on mature trees, adding winter interest. Foliage of some cultivars bronzes in winter, which is reversible and not a sign of damage.

Cryptomeria japonica, commonly known as Japanese cedar or sugi, is native to Japan and southeastern China, where it thrives in the warm, humid temperate forests of mountainous regions. In Japan, it is found across all four main islands from Aomori Prefecture in the north to Yakushima in the south, growing naturally at elevations between 200 and 1,800 meters. The species holds an unparalleled place in Japanese culture and forestry, having been cultivated since at least the Jomon period. Ancient specimens still standing at shrines and temples across Japan serve as living monuments to centuries of reverence. The most famous planting is the Cryptomeria Avenue of Nikko, established between 1625 and 1651 by the feudal lord Matsudaira Masatsuna as a tribute to the first Tokugawa shogun. Sugi has been the cornerstone of Japanese forestry for centuries, valued for its fast growth rate, straight trunk, and versatile, rot-resistant timber. Cryptomeria plantations currently cover approximately 12 percent of Japan's total forest area, making it the most widely planted tree in the country. The wood has been used for everything from temple construction and shipbuilding to the distinctive wooden casks called taru used in sake and soy sauce production. Cryptomeria was introduced to Western horticulture in the 1840s and 1850s through plant collectors such as Robert Fortune and Philipp Franz von Siebold. It quickly gained popularity as an ornamental specimen in European and American gardens, where dozens of cultivars have been selected for varied growth habits, foliage colors, and sizes ranging from towering timber trees to compact garden dwarfs.

Cryptomeria thrives in moist, acidic, well-drained soil with a pH of 5.0 to 6.5. It does not tolerate alkaline conditions or poor drainage. Amend heavy clay with generous quantities of pine bark fines, compost, and perlite before planting. Mulch annually with 3 to 4 inches of acidic organic matter extending to the drip line. Fertilize in early spring with an acidifying fertilizer formulated for evergreens or azaleas. Avoid late-season fertilization that promotes tender growth vulnerable to frost damage. Established trees in organically rich soil may need little supplemental feeding.

Cryptomeria is not grown for food harvest. The wood is highly valued in Japan for construction, furniture, and traditional crafts due to its light weight, straight grain, and pleasant fragrance. In landscape settings, the aromatic wood trimmings from pruning can be chipped for use as decorative or fragrant mulch. Small round cones can be collected in fall for ornamental use or seed propagation. The attractive exfoliating bark is a notable ornamental feature on mature trees.

Cryptomeria wood is naturally resistant to decay and insects due to its aromatic oils. Pruning trimmings can be chipped and used as fragrant mulch, retaining their scent for several months. Fresh foliage cuttings last well in water for floral arrangements, remaining green for 2 to 3 weeks in cool conditions. Seeds should be extracted from dried cones and stored in sealed containers in the refrigerator where they maintain viability for 2 to 3 years.