red ash tree

Fraxinus pennsylvanica
Fraxinus pennsylvanica is a plant with strong cold and drought tolerance that thrives in Korea's diverse climates. The following describes the growth characteristics, propagation and cultivation methods, garden uses, and pest and disease control methods of Fraxinus pennsylvanica.

Growth Characteristics
- Height and Diameter: Generally, it grows to a height of 10–20 m, and the trunk diameter can reach 30–60 cm.
- Leaves: The leaves are pinnately compound, arranged in clusters of 7–9, attached to a central axis. The surface of the leaves is dark green and turns yellow in the autumn.
- Flowers: Flowering occurs in April and May. The plant is either monoecious or dioecious. The flowers are usually inconspicuous.
- Fruit: The fruit, in the form of a samara, ripens in August and September and is easily dispersed by the wind.

Propagation Methods
- Seed Propagation: In its natural state, Fraxinus pennsylvanica primarily propagates by seeds. Seeds can be collected in the autumn and sown immediately, or sown the following spring after cold stratification.
- Propagation by Cuttings: Propagation is also possible through branch cuttings. Using green branches for cuttings in the spring results in a high success rate.

Cultivation Method
- Soil: It thrives in fertile, well-drained soil and prefers slightly acidic or neutral soil.
- Location: It grows well in sunny locations, but can adapt to partial shade to some extent.
- Watering: Regular watering is necessary during the dry germination period. Once rooted, it has good drought tolerance, allowing for reduced watering.
- Fertilizer: It can grow without special fertilizer, but applying slow-release fertilizer in the spring can promote healthy growth.

Garden UseThe Red Ash is commonly used as a garden tree or street tree due to its fast growth rate and beautiful form. Its leaves turn yellow in the autumn, creating an excellent landscape effect. Major Pests and Diseases and Control Methods
- Emerald Ash Borer: This is one of the major pests that attack Red Ash trees. Adults bore into the tree bark, causing damage. For prevention, it is necessary to apply insecticides promptly when pests appear.
- Fungal Diseases: Since excessive humidity can lead to fungal diseases, ensure good ventilation. If an outbreak occurs, control it using fungicides specifically designed for fungal diseases.

By referring to the information above, you can effectively cultivate and manage Red Ash trees. Excessive use of water or fertilizer can be harmful, so proper management is required.
Plant Family	Oleaceae
Height	12~25m
Spread	10~15m
Colors	purple
Bloom Period	April to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-40°C
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