Rudbeckia grandiflora

Rudbeckia grandiflora

Rudbeckia grandiflora is a perennial plant belonging to the Asteraceae family, characterized by its large, bright yellow flowers. Native to the southern and central regions of the Americas, it thrives in a variety of climates due to its strong vitality and cold tolerance.

Growth Characteristics
- Height: Grows to approximately 60 to 120 cm.
- Flowers: Bloom from summer to autumn, with a diameter of over 10 cm.
- Roots: As a perennial plant, it possesses deep-spreading roots.

Propagation Methods
- Seeds: Propagation is generally done by seeds, which are sown in the spring. Germination is generally good, but in colder regions, it is recommended to start indoors before transplanting.
- Division: It can also be propagated by dividing the clumps. This is usually done in the spring or autumn.

Cultivation Methods
- Soil: It prefers well-drained soil but grows well in standard garden soil.
- Sunlight: It likes sunny locations. - Watering: Although it is drought-tolerant, it requires sufficient moisture during the flowering period.
- Fertilizer: No special fertilizer is necessary, but it is beneficial to apply a small amount of organic fertilizer during the growing season.

Uses in the Garden
- Landscape Creation: The showy flowers provide a visual focal point in the garden and blend well with other perennial flowers.
- Arrangements: They remain fresh for a long time even when cut and placed in a vase.

Important Pests and Control Methods
- Diseases: It is relatively resistant to disease, but root rot can occur if the soil is overwatered. It is important to pay attention to drainage.
- Pests: Pests such as aphids may occur; to prevent this, you can use appropriate insecticides or soapy water.
- Prevention: Regular weeding and maintaining good ventilation by adjusting planting spacing helps prevent pests and diseases.

Rudbeckia grandiflora is a relatively easy-to-care-for plant, making it a suitable choice for gardening beginners. With proper care, you can enjoy beautiful flowers every year.

Plant Type
Plant Family	Asteraceae
Height	60~150cm
Spread	60~90cm
Colors	yellow
Bloom Period	April to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

Rudbeckia misouriensis
Rudbeckia missouriensis

Rudbeckia 'Little Henry'
Rudbeckia subtomentosa 'Little Henry'