Helianthemum numularium

Helianthemum nummularium

Helianthemum nummularium, commonly known as the 'Rock Rose,' is a perennial herbaceous plant native to Europe. The following is information regarding this plant's growth characteristics, propagation methods, cultivation techniques, garden uses, and major pests and diseases and control methods.

Growth Characteristics
- Sunlight: It thrives in direct sunlight, and blooms more abundantly in locations receiving ample sunlight.
- Soil: It prefers well-drained soil. It also grows well in sandy or gravelly soils.
- Humidity: It is susceptible to overwatering, so excessive watering should be avoided.
- Cold Hardiness: It is relatively resistant to cold and can adapt to various climates.

Propagation Methods
- Seeds: Directly sow seeds harvested in the autumn in early spring.
- Cuttings: In the summer, after the flowers have faded, new growth can be cut and propagated. Cultivation Method
- Plant in well-draining soil, and provide adequate watering while growing.
- Regular pruning helps maintain the plant's shape and promotes better flowering.

Garden Use
- Suitable for planting in rock gardens, on slopes, or around low walls; it is also excellent for use as ground cover.
- The diverse and bright flower colors, such as yellow, orange, and pink, enhance the landscape.

Important Pests and Control Methods
- Pests and Diseases: While generally resistant to pests and diseases, excessive moisture can lead to root rot or fungal issues.
- To prevent this, grow in well-draining soil and position the plant to ensure good ventilation.
- Control Methods: If problems occur, remove the infected parts and use an appropriate fungicide if necessary.

Based on this information, you will be able to grow a healthy Helianthemum numularium.

Plant Family	Cistus family
Height	15~30cm
Spread	60~90cm
Colors	yellow
Bloom Period	May~June
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-15°C

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