Japanese zelkova

Distylium racemosum

Distylium racemosum possesses the following characteristics regarding growth, propagation, cultivation, garden uses, major pests and diseases, and control methods.

Growth Characteristics
- Scientific Name: Distylium racemosum
- English Name: Isu Tree
- Classification: An evergreen broad-leaved tree belonging to the Hamamelidaceae family
- Height: Generally grows to 10–15 meters, and can reach up to 20 meters.
- Leaves: Oval-shaped, glossy, and remain green in the autumn.
- Flowers: Small flowers bloom from winter to spring. The flowers are small and not showy.

Propagation Methods
- Seed Propagation: Can be propagated by sowing seeds; using fresh seeds is recommended to increase germination rates.
- Cutting Propagation: Can be propagated via semi-hardwood cuttings in the summer. Caution is required as rooting is not particularly fast.

Cultivation Methods
- Soil: Suitable for cultivation in well-drained areas; it prefers acidic soil. - Location: Grows well in sunny or partial shade; avoid strong winds.
- Watering: Water periodically when dry. Avoid overwatering.
- Fertilizer: Applying slow-release fertilizer appropriately in the spring is beneficial.

Uses in the Garden
- Popular as a landscaping tree and can also be used as a hedge.
- Provides shade throughout all four seasons due to its evergreen nature.
- Suitable as a landscape tree near streams or in parks.

Important Pests and Control Methods
- Diseases: Be careful of fungal diseases; if disease is detected, remove the affected plants promptly and use fungicides if necessary.
- Pests: Be careful of aphids and scale insects and use insecticides regularly.
- Prevention: To prevent pests and diseases, maintain good ventilation, avoid overwatering, and prune appropriately when necessary.

Rakemosum can grow healthily under proper care and can be utilized as an important landscaping element in gardens or parks.

Plant Family	Hamamelidaceae
Height	10~20m
Colors	red
Bloom Period	April~May
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-15°C

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