Rudbeckia ‘Denver Daisy’

Rudbeckia ‘Denver Daisy’: A Tribute to Denver’s Rich Heritage

Rudbeckia ‘Denver Daisy’ is a striking cultivar of the Black-Eyed Susan, developed by Ernst Benary Seeds to commemorate the 150th anniversary of Denver, Colorado. This vibrant plant is perfectly suited for the arid climate of Colorado, thriving in hot, sunny areas with minimal moisture. The Denver Daisy boasts large, golden flowers, each adorned with a rich mahogany ring and a dark chocolate cone at the center. The blooms, which measure 3-4 inches across, appear from early summer until the first frost, providing a continuous display of eye-catching color.

Common Name: Denver Daisy Black-Eyed Susan
Scientific Name: Rudbeckia hirta ‘Denver Daisy’
Family: Asteraceae
Plant Type: Biennial or short-lived perennial, typically grown as an annual

Plant Characteristics

• Height: 18-24 inches (45-60 cm)
• Spread: 12-18 inches (30-45 cm)
• Blooming Season: Early summer to frost
• Exposure: Full sun
• Foliage: Medium green, coarse, and hairy leaves
• Flowers: Golden-yellow petals with a deep red ring around a dark brown cone
• Growth Rate: Rapid
• Growth Habit: Upright, clump-forming

Care Instructions Rudbeckia ‘Denver Daisy’:

Light Requirements:

Rudbeckia ‘Denver Daisy’ thrives in full sun, needing at least six hours of direct sunlight daily. This ensures the best flowering and overall growth.

Watering:

Once established, the Denver Daisy is moderately drought-tolerant. Water regularly during the first growing season to establish a deep, extensive root system. Thereafter, water as needed to keep the soil slightly moist but not soggy.

Soil:

This plant adapts to a wide range of soil types, including clay, sand, and loam. It prefers well-drained soil with medium moisture. While it can tolerate dry soils, it will not thrive in wet, poorly drained conditions.

Fertilizing:

Rudbeckia ‘Denver Daisy’ is not a heavy feeder. Apply a light application of a balanced, slow-release fertilizer in the spring to promote healthy growth and abundant blooms. Avoid over-fertilizing, as this can lead to excessive foliage at the expense of flowers.

Pruning:

Deadhead spent flowers regularly to encourage continuous blooming and prevent unwanted self-seeding. In the fall, leave the last flush of flowers on the plant to set seeds for winter interest and food for birds. Cut back the plant to the ground in early spring to promote fresh new growth.

Propagation of Rudbeckia ‘Denver Daisy’:

Seeds:

1. Sowing: Collect seeds from mature flower heads in the fall. Sow them directly in the garden in early spring or start indoors 6-8 weeks before the last frost date.
2. Germination: Keep the soil consistently moist until germination, which typically occurs within 14-21 days.
3. Transplanting: Transplant seedlings outdoors after the danger of frost has passed, spacing them 12-18 inches apart.

Division:

While Rudbeckia ‘Denver Daisy’ is typically propagated by seed, it can also be divided in early spring or fall. Carefully dig up the plant and separate the clumps, ensuring each division has several healthy shoots and roots. Replant immediately.

Special Features

• Heat and Drought Tolerance: Ideal for hot, dry climates once established.
• Deer Resistance: Less likely to be browsed by deer, making it a low-maintenance option for wildlife-prone areas.
• Pollinator-Friendly: The bright, nectar-rich flowers attract bees, butterflies, and other pollinating insects.
• Bird Attraction: The seed heads provide food for songbirds, such as American goldfinches, during the winter months.
• Low Maintenance: Requires minimal care, forgiving of neglect, and adaptability to various soil types.

Landscape Uses

• Borders and Beds: Perfect for adding color to mixed borders and garden beds.
• Containers: Suitable for decorative pots and container gardens.
• Cut Flowers: Long-lasting blooms make excellent cut flowers for indoor arrangements.
• Mass Planting: Effective when planted in large groups for a dramatic display of color.
• Pollinator Gardens: Enhances biodiversity by attracting pollinators and providing food for birds.

Conclusion

Rudbeckia ‘Denver Daisy’ is a versatile and vibrant addition to any garden, offering long-lasting color and low maintenance. Its rich golden flowers with mahogany accents make it stand out in borders, containers, and mass plantings. Whether you’re looking to attract pollinators, provide food for birds, or simply enjoy a splash of color from summer to fall, the Denver Daisy is a perfect choice. Its ease of care and adaptability to various growing conditions make it a favorite among gardeners and a fitting tribute to the city of Denver’s rich history.