When to Prune Sophora Japonica?
While small trees enhance the ornamental appeal of a yard, growing large trees in the landscape helps provide shade and wind protection. The Sophora japonica is a common tree in many areas that have moderate climates. Pruning this large tree at the correct time will encourage healthy growth and a uniform appearance. Does this Spark an idea?
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Characteristics
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Japanese pagoda tree is the common name for Sophora japonica. This tree grows to an average mature height of around 50 to 70 feet and has a canopy that reaches about 50 feet in diameter. Sophora japonicas produce yellow and white blossoms in July and August. As the blossoms fade, long-lasting cream-colored seedpods appear in their place. This tree experiences rapid growth that requires regular pruning.
Shaping
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Sophora japonica tends to produce low branches that may block the sunlight to the grass and ground covers growing below the canopy. Annual pruning serves to remove these lower branches as well as crowded branches within the canopy. The best time to perform annual pruning on a Sophora japonica is during the dormant season, usually between the months of November and February. Pruning at this time will avoid removing the flowers that form on the current season's growth and encourage abundant blossoms.
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Damage Control
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While winter is the best time for annual pruning, Sophora japonica requires regular maintenance to remove broken limbs and diseased growth. Checking your tree once a week will allow you to remove any damaged growth as soon as it appears. Examine the canopy for clusters of dead leaves. This is a common sign of wind and pest damage.
Technique
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The best method for trimming the lower branches of a tree is to remove the ones that emerge from the lower 5 to 8 feet of trunk. Examining your tree from a distance will help you create a uniform shape that enhances the overall appearance of the tree. Removing the branches about 1 inch from their point of origin on the trunk will help create the appearance of a straight, smooth trunk. Trimming off damaged and diseased branches about 3 inches into the healthy portion of branch will ensure complete removal and minimize the spread of disease.
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