Posted on Updated on

Schermata 2015-10-19 alle 21.38.57


How can I learn to do Bonsai?   Are the plants easy to take care of?   What do they come and require?

japanese-bonsai-treeBonsai is a Japanese art form using miniature trees grown in containers. Similar practices exist in other cultures, including the Chinese tradition of penjing from which the art originated, and the miniature living landscapes of Vietnamese hon non bo. The Japanese tradition dates back over a thousand years, and has its own aesthetics and terminology.   “Bonsai” is a Japanese pronunciation of the earlier Chinese term penzai. A “bon” is a tray-like pot typically used in bonsai culture. The word bonsai is often used in English as an umbrella term for all miniature trees in containers or pots. This article focuses on bonsai as defined in the Japanese tradition.

The purposes of bonsai are primarily contemplation (for the viewer) and the pleasant exercise of effort and ingenuity (for the grower). By contrast with other plant cultivation practices, bonsai is not intended for production of food, for medicine, or for creating landscapes. Instead, bonsai practice focuses on long-term cultivation and shaping of one or more small trees growing in a container.

A bonsai is created beginning with a specimen of source material. This may be a cutting, seedling, or small tree of a species suitable for bonsai development. Bonsai can be created from nearly any perennial woody-stemmed tree or shrub species that produces true branches and can be cultivated to remain small through pot confinement with crown and root pruning. Some species are popular as bonsai material because they have characteristics, such as small leaves or needles that make them appropriate for the compact visual scope of bonsai.

The source specimen is shaped to be relatively small and to meet the aesthetic standards of bonsai. When the candidate bonsai nears its planned final size it is planted in a display pot, usually one designed for bonsai display in one of a few accepted shapes and proportions. From that point forward, its growth is restricted by the pot environment. Throughout the year, the bonsai is shaped to limit growth, redistribute foliar vigor to areas requiring further development, and meet the artist’s detailed design.

The practice of bonsai is sometimes confused with dwarfting, but dwarfing generally refers to research, discovery, or creationgrape-bonsai-tree of plant cultivars that are permanent, genetic miniatures of existing species. Bonsai does not require genetically dwarfed trees, but rather depends on growing small trees from regular stock and seeds. Bonsai uses cultural techniques like pruning, root reduction, potting, defoliation, and grafting to produce small trees that mimic the shape and style of mature, full-size trees.

In 1351, dwarf trees displayed on short poles were portrayed in the Boki Ekotoba scroll. Several other scrolls and paintings also included depictions of these kinds of trees. Potted landscape arrangements made during the next hundred years or so included figurines after the Chinese fashion in order to add scale and theme. These miniatures would eventually be considered garnishes decidedly to be excluded by Japanese artists who were simplifying their creations in the spirit of Zen Buddhism.   Around the 14th century, the term for dwarf potted trees was “the bowl’s tree.”   This denoted the use of a fairly deep pot, as opposed to the shallow pot denoted by the term bonsai.

Bonsai placed in the grand setting of the Imperial Palace had to be “Giant Bonsai,” large enough to fill the grand space. The Meiji Emperor encouraged interest in bonsai. Government officials who did not appreciate bonsai fell out of favor. Soon all members of the ministry had bonsai whether they liked the tradition or not. Prince Itoh was an exception: Any bonsai that the emperor gave him were then passed to Kijoji Itoh. Kijoji Itoh was a statesman of great influence behind the scenes, and a noted bonsai collector who conducted research and experiments on these bonsai.

Bonsai shaping aesthetics and techniques were becoming more sophisticated. By the late 1860s, thick combed and wetted hemp fibers were used to roughly shape the trunk and branches of miniature trees by pulling and tying them. The process was tedious and bothersome, and the final product was unsightly. Tips of branches would only be opened flat. Long, wavy-branched tako (octopus)-style trees were mass produced and designed in the [renamed capital] Tokyo for the increasing foreign trade, while the more subtle and delicate bunjin-style trees designed in Kyoto and Osaka were for use in Japan. Tokyo preferred big trunks out of proportion and did not approve of Kyoto’s finely designed slender trunks.

In 1910, shaping with wire was described in the Sanyu-en Bonsai-Dan (History of Bonsai in the Sanyu nursery).  Zinc-galvanized steel wire was initially used. Expensive copper wire was only used for trees that had real potential. Formal rooms and tea rooms became the main place for bonsai display. The shaped trees now shared space with other items such as scrolls, incense burners, Buddhist statues and tea ceremony implements.

bonsai_3_l1Bonsai has now definitively reached a world-wide audience. There are over twelve hundred books on bonsai and the related arts in at least twenty-six languages available in over ninety countries and territories. A few dozen magazines in over thirteen languages are in print. Several score of club newsletters are available on-line, and there are at least that many discussion forums and blog. Educational videos and just the appearance of dwarf potted trees in films and on television reach a wide audience. There are at least a hundred thousand enthusiasts in some fifteen hundred clubs and associations worldwide, as well as over five million unassociated hobbyists. Plant material from every location is being trained into bonsai and displayed at local, regional, national, and international conventions and exhibitions for enthusiasts and the general public.

All bonsai start with a specimen of source material, a plant that the grower wishes to train into bonsai form. Bonsai practice is an unusual form of plant cultivation in that growth from seeds is rarely used to obtain source material. To display the characteristic aged appearance of a bonsai within a reasonable time, the source plant is often mature or at least partially grown when the bonsai creator begins work. Sources of bonsai material include: (a) Propagation from a source tree through cutting or layering; (b) Nursery stock directly from a nursery, or from a garden center or similar resale establishment (c) Commercial bonsai growers, which, in general, sell mature specimens that display bonsai aesthetic qualities already; and (d) Collecting suitable bonsai material in its original wild situation, successfully moving it, and replanting it in a container for development as bonsai. These trees are called yamadori and are often the most expensive and prized of all Bonsai.

The practice of bonsai development incorporates a number of techniques either unique to bonsai or, if used in other forms of cultivation, applied in unusual ways that are particularly suitable to the bonsai domain. These techniques include: (1) Leaf trimming, the selective removal of leaves (for most varieties of deciduous tree) or needles (for coniferous trees and some others) from a bonsai’s trunk and branches; (2) Pruning the trunk, branches, and roots of the candidate tree; (3) Wiring branches and trunks allows the bonsai designer to create the desired general form and make detailed branch and leaf placements; (4) Clamping using mechanical devices for shaping trunks and branches; (5) Grafting new growing material (typically a bud, branch, or root) into a prepared area on the trunk or under the bark of the tree; (6) Defoliation, which can provide short-term dwarfing of foliage for certain deciduous species; and (7)   Deadwood bonsai techniques called jin and shari simulate age and maturity in a bonsai.

Small trees grown in containers, like bonsai, require specialized care. Unlike houseplants and other subjects of containerimages gardening, tree species in the wild, in general, grow roots up to several meters long and root structures encompassing several thousand liters of soil. In contrast, a typical bonsai container is less than 25 centimeters in its largest dimension and 2 to 10 liters in volume. Branch and leaf (or needle) growth in trees is also of a larger scale in nature. Wild trees typically grow 5 meters or taller when mature, whereas the largest bonsai rarely exceed 1 meter and most specimens are significantly smaller. These size differences affect maturation, transpiration, nutrition, pest resistance, and many other aspects of tree biology. Maintaining the long-term health of a tree in a container requires some specialized care techniques: (1) Watering must be regular and must relate to the bonsai species’ requirement for dry, moist, or wet soil; (2) Repotting must occur at intervals dictated by the vigor and age of each tree; (3) Tools have been developed for the specialized requirements of maintaining bonsai; (4) Soil composition and fertilization must be specialized to the needs of each bonsai tree, although bonsai soil is almost always a loose, fast-draining mix of components; and (5) Location and overwintering are species-dependent when the bonsai is kept outdoors as different species require different light conditions. It is important to note that few of the traditional bonsai species can survive inside a typical house, due to the usually dry indoor climate.

Kathy Kiefer

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s