Plant Profile: Buxus microphylla var. japonica 'Borderline'

Madonna might not be a fan of hydrangeas, but this particular plant could very well sway her opinion on boxwoods! Discovered as a branch sport by our friend and esteemed author Clarence Towe, known for his work on North American Azaleas, from Walhalla, SC, ‘Borderline’ features deep green leaves adorned with striking yellow and gold edges. It is not protected by any patent or trademark.

The term "boxwood" originates from the historical use of its wood for crafting intricately carved boxes. Another interpretation of the name refers to the square cross-section of the young plants' stems. Boxwoods serve beautifully as specimen plants or accents in landscaping, and they are also effective in shrub borders or as foundation plantings. They are frequently employed for edging and in formal hedges.

Japanese boxwood foliage typically retains its green color during winter when grown in shaded areas, but it may take on a reddish hue if exposed to full sunlight. Fortunately, vibrant green foliage usually returns by mid-spring. It’s important to promptly remove heavy snow from the plants to prevent damage to the stems and branches. Under optimal growing conditions, these plants can self-seed vigorously. They generally respond well to pruning and shearing, but it’s crucial to avoid pruning before the last frost of spring, as early cuts can encourage tender new growth that may be susceptible to late frosts. Additionally, avoid disturbing the soil around the plants due to their shallow root systems. A layer of organic mulch, such as bark or compost, about 1-2 inches thick, is beneficial for the roots. Regularly thinning the plants and removing any dead or damaged branches each year will enhance air circulation.

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