American elm

Ulmus americana

American Elm (Ulmus americana)

Growth Characteristics:

This is a deciduous tree widely distributed in the eastern and central regions of North America. It typically grows to a height of 20–30 meters; the trunk is erect, and the branches spread widely to form a rounded canopy. The leaves are alternate, oval-shaped, about 5–15 cm long, and have serrated edges. The tree has excellent soil adaptability and thrives in well-drained, moist soil.

Propagation Methods:

It is primarily propagated by seeds. Seeds mature after flowering in the spring and can be dispersed far and wide by wind. Grafting and cuttings are also used, but seed propagation is the most common method.

Cultivation Methods:
 - It is important to plant in a sunny location.
 - Well-drained, high-quality soil is suitable.
 - When planting, dig a hole that is sufficiently deep and wide, and plant with water. 4. After planting, water thoroughly to ensure the roots establish well.
 - Regular watering and fertilization are required during the growing season.

Uses in Gardens:
It is suitable for gardens or parks to provide shade. Additionally, due to its beautiful form, it is popular as a landscape tree and is widely used as a street tree.

Important Pests and Control Methods:

It is highly susceptible to Dutch elm disease. This disease has a high mortality rate as fungal mycelium invades through the tree trunk. Control requires selecting disease-resistant varieties or applying fungicides periodically. It is also important to remove diseased parts through pruning and prevent the movement of beetles that transmit the disease. It is recommended to follow expert guidelines for control measures.

Plant Type
Plant Family	Elm family
Height	18~24m
Spread	12~21m
Colors	yellow
Bloom Period	May to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-40°C

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