Narrow-leaved sunflower

Helianthus angustifolius

Helianthus angustifolius, the narrow-leaved sunflower, is a perennial herbaceous plant belonging to the Asteraceae family and is primarily native to North America. This plant has the following characteristics and care instructions:
 - Growth Characteristics:
- Form: It has narrow leaves and long stems, growing to a height of approximately 1.5 to 2 meters.
- Flowering Period: Yellow flowers bloom from late summer to autumn.
- Environment: It prefers sunny locations and thrives in moist soil.
 - Propagation Methods:
- Seeds: Seeds harvested in autumn can be sown directly in early spring or germinated indoors and then transplanted.
- Division: It can be propagated by dividing root clumps in spring or autumn.
 - Cultivation Methods:
- Plant in well-draining soil and water frequently. Water thoroughly, especially during dry weather.
- Support stakes may be necessary due to its rapid growth. 4. Use in the Garden:
- Due to its tall stature and bright flowers, it is suitable as a border plant or background plant.
- It is also beneficial for ecological gardens as it attracts bees and butterflies.
 - Important Pests and Control Methods:
- Diseases: Root rot or leaf mold may occur due to excessive moisture. Prevent this by maintaining a well-drained environment and ensuring proper ventilation.
- Pests: Aphids or spider mites may occur; if detected, use soapy water spray or insecticides.
- Other: Although not mandatory, perform regular pruning and add compost for robust growth.

The Narrow-leaved Sunflower is a relatively easy plant to care for and is useful for adding color and structural elements to the garden. With just a little care, it grows healthily and provides a beautiful landscape.

Plant Family	Asteraceae
Height	150~240cm
Spread	60~120cm
Colors	yellow
Bloom Period	September to November
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

sunflower Argophilus
Helianthus argophyllus

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