broad-leaved ash

Fraxinus sieboldiana

Fraxinus sieboldiana is a deciduous broad-leaved tree distributed across Asia, including Korea, Japan, and China. It possesses the following characteristics regarding growth, propagation, cultivation, garden uses, major pests and diseases, and control methods.

Growth Characteristics
- Height: It can typically grow up to 10–15 meters, and its growth rate is relatively fast.
- Leaves: They are pinnately compound leaves with an even number of leaves. They mainly turn yellow in the autumn.
- Environment: It thrives in sunny locations and prefers well-drained soil. However, it is highly adaptable to various soil conditions.

Propagation Methods
- Seed Propagation: This method involves collecting fallen fruits in the autumn and sowing them the following spring. Cold treatment can increase germination rates.
- Cuttings: Branches of an appropriate length can be cut and propagated during the summer, but the success rate is not high. Cultivation Methods
- Planting: Early spring is the most suitable time, but autumn is also possible in areas free from cold damage.
- Watering: Water thoroughly during the initial period after planting, and provide additional water only during dry periods thereafter.
- Pruning: It is recommended to prune in late winter or early spring to maintain the tree's shape.

Uses in the Garden
- Japanese ash is highly popular as a landscape tree. Thanks to its neat shape and beautiful foliage, it is widely used as a garden or park tree.

Major Pests and Diseases & Control Methods
- Diseases: Major diseases include leaf blight and fungal leaf spot. If an outbreak occurs, remove diseased leaves and branches, and use an appropriate fungicide if necessary.
- Pests: Pests such as the leaf roller moth can be a problem. Upon early detection, they can be removed directly or organic insecticides can be used; in severe cases, chemical control may be required.

Japanese ash is relatively easy to care for and is a sturdy tree that can be utilized for various purposes in the garden.

Plant Family	Oleaceae
Height	18~24m
Spread	12~15m
Colors	yellow, green
Bloom Period	April to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

American ash
Fraxinus americana

red ash tree
Fraxinus pennsylvanica