Say ‘art’ and most will think of painting or sculpture. There is a kind of sculpture, though, that takes as its raw material not stone or wood but a living tree. That is the art of bonsai.

From the Japanese word for ‘tree in a tray’, Bonsai is the art and product of shaping trees by careful pruning to produce a miniature tree or bush. Not produced from genetic dwarfs, bonsai are the result of years of patient shaping of ordinary species by master artists.

Because they are grown and shaped in a small pot, but are produced from ordinary species - pine, maple and many others - extreme care is required to keep the delicate plants healthy.

Soil type and temperature must be just so - conditions that are only within the artist’s control within a certain range. Pruning techniques take years to master and are only possible to a certain kind of temperament. Potting and re-potting practices must be learned and they are many and varied.

Watering alone is a complex science for these small trees and bushes. Too much and the bonsai will become water-logged and develop fungi and root rot. Too little and the soil quickly becomes dry and leaves wilt and the tree dies.

Soil and potting practices overlap with watering needs since drainage is critical. Pruning habits interact with shaping techniques, which in turn are affected by soil maintenance and watering practices.
(Read on …)