“What should be the height of a Bonsai?” There is no precise, mathematically defined answer to this question. A Bonsai can be as small as 5 centimeters or as “giant” as 2 meters tall. There is a traditional classification of Bonsai sizes with corresponding Japanese terminology:
Keishi 2.5 cm. (Miniature)
Shito 7.5 cm (Very small)
Mame 15 cm (Small)
Shohin 20 cm (Medium)
Kifu Sho 40 cm. (Medium large)
Chiu 60 cm (Large)
Dai 100 cm (Very large)
Hachi-uye 150-200 cm (Giant)
Many specialists and enthusiasts do not see the necessity in "fine" divisions and generally prefer four categories:
Small bonsai: 5-15 cm;
Medium-sized bonsai: 15-50 cm;
Large bonsai: 50-100 cm;
Giant bonsai: over 100 cm.
Of course, categorizing by size is conditional and they never try to assess the value of a bonsai based solely on its height. Very often, when working with a sapling, the plant itself "suggests" what size the future bonsai should be.
Miniature bonsai requires special attention. Due to its small size, the shaping should be done with great care. The lifespan, as they say, is relatively shorter than that of medium or large plants. Taking care of such bonsai is more delicate: in winter, it must be protected from frost, and in summer, during heat, it may need watering two to three times a day. Despite all the challenges, working on a bonsai of this size has its advantages: it can be created and brought to "perfection" in a shorter amount of time.