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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'