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Korean ash tree
Philadelphus schrenkii
Philadelphus schrenkii is well known as an attractive tree characterized by its showy, primarily white flowers. This tree has the following growth characteristics, propagation methods, cultivation methods, garden uses, major pests and diseases, and control methods. Growth Characteristics Philadelphus schrenkii prefers sunlight but can also thrive in partial shade. It prefers well-drained soil, and maintaining adequate humidity is important. This tree is resistant to cold damage and is a highly cold-hardy tree capable of growing in various climates. Propagation Methods Propagation is mainly achieved through cuttings or seed germination. Cuttings are taken during the summer; healthy branches should be selected and provided with sufficient moisture in light shade. For seed germination, seeds collected in the autumn should be refrigerated and sown in early spring. Cultivation Methods When cultivating Philadelphus schrenkii, plant it in a well-drained location and provide sufficient water during the initial stages. Mature trees are relatively drought-tolerant, but it is recommended to water them regularly during dry periods. Pruning is necessary in late winter or early spring to maintain their beauty. Uses in the GardenThis tree is particularly popular as a garden tree due to its beautiful flowers. It is suitable for planting as a hedge or ornamental tree. It is especially beautiful during the flowering season, making it an excellent focal point in the garden. Important Pests and Control MethodsThe main pests include powdery mildew and aphids. Powdery mildew can occur in excessive moisture, so maintain proper ventilation and be careful to avoid direct contact with water droplets. Aphids can be controlled using soapy water or specialized insecticides in the early stages of infestation. Preventively, it is important to select pest-resistant varieties and improve ventilation through regular pruning. By managing the Screnkeyi in this way, you can maintain beautiful flowers and a healthy tree.
Plant Type
Plant Family
Saxifragaceae
Height
2~4m
Spread
Colors
white
Bloom Period
April~May
Water Needs
commonly
Exposure
Sunny
Freezing Resistance
-40°C
Thin-leaved Korean Spiraea
Philadelphus tenuifolius
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Philadelphus pekinensis