Key Cultivation and Management Techniques for Korean Boxwood

Korean boxwood (Buxus sinica var. insularis) is an evergreen shrub with extremely strong cold resistance. It has characteristics such as resistance to wind and sand, tolerance to drought, and preference for shade.

In semi-shaded environments it can remain evergreen year-round, and in landscaping projects it can be used for hedges, parterre beds, shrub balls, and various pattern shapes.

Korean boxwood prefers fertile soil. Before sowing, the soil should be deep-plowed to 30 cm and organic fertilizer applied as a base fertilizer, and the bottom of the seedbed furrow should be leveled with a wooden batten. After sowing, cover with 3 cm of soil, then cover with 5 to 10 cm of grass. In mid-April of the following year, when there is no frost, remove the grass covering in three stages. Around May 1, special attention should be paid to cold waves, and if the weather changes, cover with grass promptly to prevent frost damage.

In summer, carry out cultivation and weeding well. Do not apply topdressing in the first year, so as to avoid overly vigorous growth that affects lignification in that year. Before winter, wind protection measures can be taken, or the plants can be dug up and stored in sand.

The advantage of overwintering in the seedbed is that transplanting the following year is not restricted by time and there is no transplanting shock; the disadvantage is that the shoot tips will die back. If dug up and stored in sand, planting should be done early in spring, and special attention must be paid to waterproofing during sand storage.

For field cultivation, the row spacing is 40 cm and the plant spacing is 10 cm. Generally, about 15,000 plants are used per mu. At planting, 30 jin of diammonium phosphate per mu can be used as a base fertilizer, and thereafter, urea topdressing is applied each spring at 50 jin per mu. After 3 to 4 years, they can be used as project seedlings.