American ash

Fraxinus americana
Fraxinus americana is a deciduous tree native to North America, primarily distributed in the eastern United States. The following describes the tree's growth characteristics, propagation methods, cultivation practices, garden uses, and major pests and diseases, as well as control methods.

Growth Characteristics
- Size: Mature trees grow to approximately 15 to 20 meters in height, and in some cases, exceed 30 meters.
- Form: It has a broad oval shape with branches spreading elegantly.
- Leaves: They are pinnately compound leaves, usually composed of 5 to 9 leaflets. In autumn, they provide beautiful fall foliage that changes from yellow to purple.
- Bark: It is gray and characterized by deep vertical fissures.

Propagation Methods
- Seeds: It can be propagated by seeds; sow them after stratifying them in a refrigerator for several months following harvest.
- Cuttings: It can also be propagated by taking cuttings from branches during the summer. Cultivation Methods
- Soil: It thrives in well-drained, fertile soil.
- Sunlight: It prefers full sun, but can grow sufficiently in partial shade.
- Watering: Avoid wet soil and water appropriately to prevent excessive moisture. However, sufficient water supply is necessary during the initial stages.
- Fertilization: Apply organic fertilizer in spring and autumn to keep the soil fertile.

Uses in Gardens
- Landscape Tree: American ash is suitable as a landscape tree in parks or gardens due to its beautiful foliage and elegant branch shape.
- Provides Shade: Its broad branches provide shade, making it suitable for gardens that desire a cool spot during the summer.

Major Pests and Control Methods
- Emerald Bear Larvae: This pest is one of the major pests of the ash. It can be controlled using insecticides or by capturing them using eco-friendly methods.
- Powdery Mildew: This can be prevented by creating a well-ventilated environment, and if it occurs, use an appropriate fungicide. - Branch Blight: Cut off diseased branches and burn them properly. It is also necessary to maintain cleanliness in the surrounding area to prevent the spread of pathogens.

If these management and prevention methods are strictly followed, American ash trees will grow healthily and can become an important element that enhances the beauty of your garden.
Plant Family	Oleaceae
Height	15~27m
Colors	red, green, purple
Bloom Period	May
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C
Water elm
Fraxinus chiisanensis
broad-leaved ash
Fraxinus sieboldiana