4棵树植物全年为一个美丽的景观

Often, trees are selected and grown for their foliage, fruit, or flowers—seasonal features that blossom and fade over the course of several months—but it’s not impossible to find deciduous trees (those with leaves that often drop over the winter) capable of delivering beauty year-round. The key is to narrow your search to trees with white bark. Even in winter months, when barren, uniquely alabaster branches offer a striking contrast against dark siding, a backdrop of evergreens, or even against the winter sky.

虽然白银树木并不罕见，但它们并不像其他树木那样普遍两个原因：某些品种需要非常具体的生长气候，而其他品种则受到疾病和昆虫侵扰的影响。在选择树之前，请确保它适合您的地理区域，通过咨询USDA Plant Hardiness Zone Map，这表明冬季冬季温度最冷。请记住，一些带有白色吠声的树木有额外的地理要求在种植区之上，如高度限制，所以您的作业为您的财产可以增长。以下四种类型的树木是最常用的是他们白皮的美丽，并且希望能够对你的院子恰到好处。

喜马拉雅桦树

您可能熟悉一些有米色或棕色树皮的桦树，而是一个选择少数喜马拉雅桦树（Betula utilisvar。Jacquemontii.) feature creamy white trunks and limbs. Native to the Himalayan region, these birch trees prefer cool, well-drained soil and全面的阳光曝光。These birch varieties grow best in zones 1 through 7, although areas where summer temps regularly exceed 80 degrees Fahrenheit can be detrimental to their growth. If you live in northern areas of the contiguous United States, Canada, or Alaska, check out the following trees with white bark—though very similar, each has a few special qualities.

• Doorenbos (Betula utilisvar。jacquemontii，'门b')每年增长高达两英尺，以达到40至50英尺的成熟高度，30英尺的皇冠蔓延。门诺斯特色剥落白皮落在露出浅橙色底层。在表面层脱落后，树皮很快就会变白，并且其树皮的缩小是一个持续的过程。棕色尾随花朵，被称为“柔绒，”出现在春天，其次是深绿色的叶子，在落下之前在秋天转动黄金。
• Jermyns（Betula utilisvar。Jacquemontii，'Jermyns')另一块剥皮皮喜马拉雅桦树每年增长大约两英尺，直到它达到30至35英尺的成熟高度，冠蔓延在20至25英尺。吉尔宁略小于其他喜马拉雅桦树，吉尔宁非常适合较小的院子。树在春天形成了长长的棕色西瓜盛开，然后罗纹绿叶在秋天变黄。
• Grayswood Ghost（Betula utilisvar。Jacquemontii., ‘Grayswood Ghost’)reaches 30 to 50 feet at maturity with a 30-foot crown spread. Grayswood Ghost is a fast grower, gaining up to three feet per year, and its bark is smooth and non-peeling. Expect brown bark on young Grayswood Ghost until the tree is about eight years old; by then, its bark gradually turns stark white. Like other Himalayan birch trees, it develops catkins in spring, followed by green leaves that turn a mellow yellow shade in fall.
• Silver Shadow (Betula utilisvar。Jacquemontii，'银色阴影')，略微较慢的种植者，每年将爬到一到两英尺，以达到35至45英尺的成熟高度，皇冠扩散为20英尺。像Grayswood Ghost一样，它的树皮是非剥皮，它在春天和柔软的黄色秋天叶子中具有棕色丁香。

虽然树木，自己，爱满阳，地面围绕着根源应该是阴影。这可以通过在躯干周围添加一层硬木树皮覆盖物来实现。此外，喜马拉雅桦树植物易患锯齿和蚜虫，它们可以发育疾病，如生锈和叶斑。为了获得最佳结果，您的树每年都会被树专业（树木家）检查一下，并根据需要处理以保持其顶级健康状况。

美国白杨

如果你是一个粉丝colorful autumn foliage, nothing beats the brilliant gold and orange show put on by a grove of Aspen trees on the side of a forested mountain. The American Aspen (Populus Temuloides.), also known as “quaking aspen” or “trembling aspen,” produces smooth white bark on a strong vertical trunk that can reach 80 feet at maturity with a narrow crown spread of only 20 feet. American Aspen’s striking white bark will develop contrasting black markings as it matures, which add to its visual interest. In optimal conditions, American Aspen is a quick grower, growing as much as four feet per year.

这种飙升的树在2到7的区域中增长了最佳，而它喜欢满天的阳光，它并不关心夏季温度，定期超过85华氏度。它还不会遵守低海拔：美国阿斯彭很少在低于2000英尺的海拔地区生长，并在5000至12,000英尺之间的高度之间增长。通过进入您的城市和国家这个交互式高度地图, you can determine if an American Aspen is suitable for your area. (Bonus points if you’re in the right elevation range和located near banks and streams, as these trees with white bark thrive with plenty of water and well-drained soil.)

With its tall, lean stature, American Aspen is well-suited to growing in clumps, and when planted three to five inches apart will produce a multi-trunk effect. It’s just as attractive when planted individually along fences and property lines, or anywhere else a statuesque border is desired. Aspens spread by root shoots, so if you have an optimal location, a few clumps of Aspen could become a spectacular grove in a 15 to 20 years.

美国梧桐

Reaching an average height of 100 feet at maturity with a similarly wide crown spread, the whitebark American Sycamore (Platanus occidentalis），是一个大景观的戏剧性补充。它在4到9的区域中变得很好，平均每年的两到两英尺半英尺。它在春天生产的微不足道的黄色花朵，使夏天能够进入大型绿色叶子（最多九英寸宽）。褐色不可食用的水果球在夏天开发，最终干燥，爆裂开放，以释放柔软的种子。它的斑驳白皮，开始棕色，10到12年后变成奶油白色，使其成为冬季景观中的最爱。

由于其large size (the average mature trunk measures three to eight feet in diameter but has been known to reach as much as 16 feet!), American Sycamore is best suited as a single specimen tree in a large area where it can reach its full growth potential. It thrives in well-drained, moist soil that’s high in organic matter. The largest American Sycamore specimens are found along waterways so plant this tree near a pond or stream for the best results.

Ghost Gum

如果你生活在9和10区，并且正在寻找快速增长的白班车树won’tlose its foliage during the winter months, consider planting a Ghost Gum (桉树育植物)。原产于澳大利亚,鬼魂口香糖,也叫“snow gum” and “white sallee,” has made a name for itself in warmer regions of the US. With its ability to grow up to three feet per year, it doesn’t take Ghost Gum long to become a specimen in the landscape. At maturity, it reaches 45 to 50 feet in height with a crown spread of 25 to 30 feet. In addition to its creamy colored smooth bark, Ghost Gum features attractive gnarled branches, and the tree emits a faint, but distinct, aroma of eucalyptus. Ghost Gum blossoms from October through December, covering the tree in an explosion of delicate white flowers that offer striking contrast against its deep green waxy leaves.

This variety grows in all types of soil,不会介意干旱, and flourishes in full sun (although it will tolerate partial shade). Perhaps unsurprisingly, it thrives in salty coastal regions. Its rapid growth rate and tough demeanor—resistant to smog, insects, and diseases—make it a good choice for planting in urban neighborhoods. Ghost Gum makes a good single specimen tree but is just as attractive when planted in groups of three or more.