Hydrangea 'Diadem'

Hydrangea serrata 'Diadem'

Hydrangea serrata 'Diadem' is a widely loved garden variety due to its attractive flowers and relatively easy maintenance. This document explains its growth characteristics, propagation methods, cultivation techniques, uses in the garden, and pest and disease control methods.

Growth Characteristics
- Flower Color: The color primarily changes from blue to purple, although the color may vary depending on soil acidity.
- Flowering Period: It blooms mainly from late spring to summer.
- Height and Width: Upon maturity, it grows to a height of approximately 1 to 1.5 meters and a width of about 1 meter.
- Environment: It thrives in partial shade or full sun and prefers moist soil.

Propagation Methods
- Cuttings: It can be propagated by cutting new branches in early summer.
- Seeds: Propagation by seeds is also possible, but individual variations may occur.

Cultivation Methods
- Soil: It grows best in fertile, well-drained soil. Flower color can be changed by adjusting soil acidity.
- Watering: Water sufficiently during dry periods, but be careful not to overwater.
- Fertilizer: You can supplement nutrients using solid fertilizers in the spring and summer.
- Pruning: Pruning branches after flowering encourages healthy blooming in the following year.

Uses in the Garden
- It is excellent for planting as a localized, noteworthy flower, and placing it along hedges or boundaries provides a beautiful landscape.

Major Pests and Control Methods
- Powdery Mildew: May occur in densely populated trees; prevention is possible through periodic ventilation and humidity control.
- Aphids: Since these pests can damage leaves, control them using soapy water or insecticides upon early detection.
- Grasshoppers: These pests invade the underground parts; control them using soil insecticides. By taking all these factors into account when cultivating 'Diadem' mountain hydrangeas, you can add attractive colors and abundant growth to your garden.

Plant Family	Hydrangea
Height	60~90cm
Spread	60~90cm
Colors	Pink, blue
Bloom Period	June to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-20°C

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