Plate flower 'Black Knight'

Alcea rosea 'Blacknight'

Alcea rosea 'Blacknight'

Growth Characteristics:

Blacknight is a variety of Alcea rosea that produces dark purple or nearly black flowers. It grows to a height of approximately 1.8 to 2.4 meters, and flowering primarily occurs during the summer. It prefers strong sunlight and exhibits optimal growth in fertile, well-drained soil.

Propagation Method:

It is primarily propagated by seeds and can be sown directly in spring or late autumn. Seeds should be sown shallowly, and germination usually takes 10 to 14 days. Transplanting is easy, but care must be taken to avoid disturbing the roots.

Cultivation Method:
- Sunlight: Plant in a location where it can receive sufficient sunlight.
- Soil: Fertile, well-drained soil is ideal.
- Watering: Avoid overwatering and manage in a well-drained environment.
- Fertilizer: Use slow-release fertilizer during the growing season to promote nutrient supply. Use in Gardens:

Taking advantage of its tall growth characteristics, it is suitable as a background plant in gardens or flower beds. Additionally, planting in groups can enhance decorative effects. It can also be combined with other perennials to create color contrast.

Important Pests and Control Methods:
- Rust: Hollyhocks can be susceptible to rust, so periodically spray fungicides as a preventive measure or remove infected parts if the disease occurs.
- Aphids: Aphids may appear, so use soapy water or insecticides for active control.
- Drainage Management: Root rot can occur if the soil is too wet, so proper drainage management is necessary.

It is important to minimize pests and diseases through preventive measures and environmental management. Manage the plant to avoid environmental stress, ensuring it grows healthily.

Plant Family	Malvaceae
Height	150~180cm
Spread	30~60cm
Colors	sable
Bloom Period	July~August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-15°C

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