Large goldenrod

Coreopsis lanceolata

Coreopsis lanceolata is a perennial herbaceous plant characterized by the following growth characteristics, propagation methods, cultivation methods, garden uses, and information on major pests and diseases and control methods.

Growth Characteristics
- Height: It grows to approximately 30–90 cm and tends to grow upright.
- Flowers: It has bright yellow flowers that bloom from late spring to early summer. The flower size is approximately 4–5 cm.
- Leaves: It has thin, elongated leaves that are thin and pinnately divided.
- Light: It prefers sunlight and thrives in full sun.

Propagation Methods
- Seeds: It can be propagated by seeds, which are sown in spring or autumn.
- Division: It can be propagated by root division, which is usually performed in spring or autumn. Cultivation Method
 - Soil: It prefers well-drained soil; if the soil is too wet, it may develop root rot.
 - Watering: Once established, it can tolerate relatively dry environments, but sufficient watering is required during the initial stages.
 - Fertilizer: It does not generally require much fertilizer, but a moderate amount of slow-release fertilizer can be applied during the growing season.

Garden Use

Golden Coreopsis is suitable for planting in clusters along flowerbed edges, in naturalistic gardens, and in flower beds. Additionally, as it attracts butterflies and bees, it can be utilized in ecological gardens.

Important Pests and Diseases & Control Methods
- Root Rot: Since it is caused by excessive moisture, it can be prevented by improving drainage.
- Aphids: They can be removed by washing with water early on, or eco-friendly insecticides can be used.
- Fungal Diseases: Create a well-ventilated environment and use appropriate fungicides if necessary.

It is important to detect and respond to various pests and diseases early. It is advisable not to neglect observation and to select appropriate pest control methods.

Plant Family	Asteraceae
Height	30~100cm
Colors	yellow
Bloom Period	May to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

Parasitic plant
Coreopsis tinctoria

Goldenrod Drummondii
Coreopsis drummondii