Tamna Hyeonhosek

Corydalis hallaisanensis
Corydalis hallaisanensis is an endemic plant native to Jeju Island, Korea, and prefers sunny to partial shaded areas. The following is information regarding the plant's growth characteristics, propagation methods, cultivation methods, garden uses, and major pests and diseases and control methods.

Growth Characteristics
- Environmental Conditions: Corydalis hallaisanensis thrives in relatively moist, well-drained soil. It possesses strong tolerance to cold temperatures and wind, but care must be taken to avoid excessive direct sunlight.
- Growth Cycle: It germinates in spring, flowers in summer, and withers in autumn before entering a dormant period.
- Flowers: Purple or light purple flowers typically bloom between May and June.

Propagation Methods
- Seeds: Collect and sow seeds produced after the flowers have faded. It is best to sow seeds in the autumn, and to increase the germination rate, it is recommended to germinate them under conditions that closely mimic outdoor environments. - Root Division: Mature plants can be propagated by dividing their roots. This method is ideally performed in spring or autumn.

Cultivation Method
- Soil Preparation: Well-draining soil is required. It is recommended to use soil with a high organic matter content.
- Watering: Consistent watering is necessary during the growing season, but care should be taken to avoid overwatering.
- Fertilizer: It is recommended to use low-concentration compound fertilizer during periods of vigorous growth.

Uses in the GardenTamra-hyeonhosek (Corydalis yanhusuo) is well-suited for shaded gardens or naturalistic gardens. Its foliage is beautiful year-round, and the flowers that bloom in spring are attractive in themselves. Planting it in clusters makes it an excellent choice for creating spring landscapes.

Important Pests and Diseases & Control Methods
- Pests and Diseases: Common diseases include leaf blight and root rot.
- Leaf Blight Control: Remove infected leaves immediately and use low-concentration fungicides if necessary. - Root Rot Control: Improve soil drainage and avoid overwatering.
- Pests: Aphids may occur.
- Aphid Control: Physically remove them upon early detection, or use organic insecticides.

Corydalis thaliana halaisanensis is a beautiful ornamental plant in itself, and with proper care and propagation methods, it can continuously enhance the charm of your garden.
Plant Family	Corydalis family
Height	20cm
Colors	purple
Bloom Period	April~May
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-15°C
Dwarf Corydalis
Corydalis humilis
large cowsuckle
Corydalis gigantea