Deam's Black-Eyed Susan
Rudbeckia fulgida var. deamii, Rudbeckia subtomentosa 'Deamii'Deam’s Black-Eyed Susan is a tall, late-season perennial prized for its abundant golden-yellow flowers and dark central cones. The daisy-like blooms appear above sturdy stems and create a bright display from late summer into fall when many other perennials begin to fade. Deep green foliage forms an attractive backdrop for the flowers and adds texture throughout the growing season. Its upright habit and long bloom period make it a standout feature in sunny gardens and naturalistic plantings.
Mature plants typically reach 3 to 5 feet tall with a spread of 2 to 4 feet, giving Deam’s Black-Eyed Susan a strong vertical presence in the landscape. It performs exceptionally well in mixed borders, pollinator gardens, and mass plantings where the cheerful flowers can be appreciated from a distance. The blooms combine beautifully with ornamental grasses and other late-season perennials, extending color and interest well into autumn. Its larger size also makes it suitable as a specimen within perennial beds.
Deam’s Black-Eyed Susan grows best in full sun and adapts to a wide range of soil conditions, provided drainage is adequate. Regular watering during establishment encourages healthy root development, while established plants tolerate periods of drought and summer heat. Fertilizer requirements are minimal, and overly rich soils may reduce flowering performance. Removing spent blooms can improve the appearance and encourage continued flowering throughout the season. Division every few years helps maintain vigor and strong bloom production.
Care Instructions:
Planting: Plant in a location that receives at least six hours of direct sunlight daily.
Soil: Adaptable to a variety of soils with good drainage.
Watering: Water regularly during establishment and during extended dry periods.
Fertilizing: Apply a balanced fertilizer in early spring if needed.
Pruning: Remove spent flowers to encourage additional blooming or leave seed heads for seasonal interest.
Spacing: Plant 2′ – 4′ (ft) apart
Maintenance: Divide clumps every few years to maintain vigor and flowering performance.
Gardeners value Deam’s Black-Eyed Susan for its reliable flowering, easy care requirements, and ability to support pollinators. Its long season of color, upright habit, and excellent garden performance make it a dependable addition to perennial borders and wildlife-friendly landscapes.
