Buxus microphylla and Buxus sempervirens are two species of boxwood that are commonly used in bonsai. While they may appear similar at first glance, there are some distinct differences between the two species.
1. Growth Habit:
Buxus microphylla, also known as Japanese Box, has a more compact and bushy growth habit compared to Buxus sempervirens, or Common Box. Japanese Box tends to have smaller leaves and finer branches, giving it a more delicate appearance. On the other hand, Common Box has a more upright and vigorous growth habit, with larger leaves and thicker branches.
2. Growth Rate:
One of the key differences between the two species is their growth rate. Japanese Box is generally slower growing and less vigorous compared to Common Box. This slower growth rate makes Japanese Box more suitable for bonsai cultivation, as it requires less frequent pruning and maintenance.
3. Tolerance to Pruning:
Due to its slower growth and compact habit, Japanese Box generally tolerates pruning and shaping better than Common Box. It can be easily manipulated into different bonsai styles and responds well to regular pruning. Common Box, on the other hand, may require more careful pruning techniques to avoid excessive regrowth and maintain its desired shape.
4. Environmental Tolerance:
Both species are hardy and can tolerate a wide range of environmental conditions. However, Common Box is known to be more adaptable to different soil types and climates. It can tolerate both sun and shade, as well as colder temperatures. Japanese Box, while still quite hardy, prefers a slightly more sheltered position and may require some protection from harsh winter conditions.
5. Pest and Disease Resistance:
Both Buxus microphylla and Buxus sempervirens are susceptible to certain pests and diseases, such as boxwood leaf miner and boxwood blight. However, Common Box is generally considered to be more resistant to these issues compared to Japanese Box. It’s important to regularly monitor and care for both species to prevent and treat any potential pest or disease problems.
While Buxus microphylla (Japanese Box) and Buxus sempervirens (Common Box) share many similarities in terms of appearance, there are noticeable differences in their growth habit, growth rate, tolerance to pruning, environmental preferences, and pest resistance. These factors should be considered when choosing which species to use for bonsai cultivation, depending on the desired style and level of maintenance required.
